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Herstmonceux: Site Log

Instructions and Update Site Log

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Section: 0. Form
Section: 1. Identification of the Ranging System Reference Point (SRP)
Section: 2. Site Location Information
Section: 3. General System Information
Section: 4. Telescope Information
Section: 5. Laser System Information
Section: 6. Receiver System
Section: 7. Tracking Capabilities
Section: 8. Calibration
Section: 9. Time and Frequency Standards
Section: 10. Preprocessing Information
Section: 11. Aircraft Detection
Section: 12. Meteorological Instrumentation
Section: 13. Local Ties, Eccentricities, and Collocation Information
Section: 14. Local Events Possibly Affecting Computed Position
Section: 15. On-Site, Point of Contact Agency Information
Section: 16. Responsible Agency (if different from 15.)
Section: 17. More Information

 
       ILRS Site and System Information Form
       International Laser Ranging Service
 
  0.   Form
 
       Prepared by (Full Name)    : Robert Sherwood
       Preparer E-mail            : rshe@nerc.ac.uk
       Date Prepared              : 2018-02-05
       Report Type                : UPDATE
       Site Log Format Version    : 2.0
       Site Log Revision          : 
 
 
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  1.   Identification of the Ranging System Reference Point (SRP)
 
       Site Name                  : Herstmonceux
       IERS DOMES Number          : 13212S001
       CDP Pad ID                 : 7840
       Subnetwork                 : EUROLAS
       Description                : AZ EL INTERSECT
       Monument Description       : N.A.
       Monument Inscription       : N.A.
       Mark Description           : N.A.
       Date Installed             : 1982-01-01
       Date Removed               : 
       Geologic Characteristic    : CLAYS/SANDSTONES
       Additional Information     : Local geology: The site is bounded to the
                                  : south by old, but now drained, marshland
                                  : with the English Channel about 6 km away.
                                  : The underlying structure is interbedded
                                  : clays and sandstones called the Hastings
                                  : Beds. There is no history of seismic
                                  : activity in the area.
 
 
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  2.   Site Location Information
 
       City or Town               : Hailsham
       State or Province          : East Sussex
       Country                    : UK
       Tectonic Plate             : Eurasian
       Local Time (UTC +/- hours) : 
       Approximate Position
         X coordinate          [m]: 4033463.1
         Y coordinate          [m]: 23662.8
         Z coordinate          [m]: 4924305.6
         Latitude            [deg]: 50.8674 N
         Longitude           [deg]: 0.3361 E
         Elevation             [m]: 75
       Survey Method              : 
       Date Measured              : 
       Additional Information     : The site is located in the grounds of
                                  : Herstmonceux Castle
 
 
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  3.   General System Information
 
  3.01 System Name                : Herstmonceux
       4-Character Code           : HERL
       CDP System Number          : 35
       CDP Occupation Number      : 01
       Eccentricity to SRP (if Not Identical With SRP)
         North                 [m]: 
         East                  [m]: 
         Up                    [m]: 
         Date Measured            : N.A.
       Date Installed             : 1982-01-01
       Date Removed               : 
       Additional Information     : 
 
 
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  4.   Telescope Information
 
  4.01 Receiving Telescope Type   : CASSEGRAIN
         Aperture              [m]: 0.5
         Mount                    : AZ-EL
       Date Installed             : 1982-01-01
       Date Removed               : 
       Xmitting Telescope Type    : REFRACTOR
         Aperture              [m]: 0.1
       Date Installed             : 1982-01-01
       Date Removed               : 
       Tracking Camera Type       : TV on wide field Celestron
         Model                    : 
         Manufacturer             : 
         Field of View       [deg]: 2.0
         Minimum Magnitude   [mag]: 8
       Date Installed             : 
       Date Removed               : 
       Transmit/Receive Path      : SEPARATE
       Transmit/Receive Switch    : NONE
       Max Slew Rate Az    [deg/s]: 20
       Max Slew Rate El    [deg/s]:  5
       Max Used Tracking Rate Az  : 20
       Max Used Tracking Rate El  : 5
       Telescope Shelter          : EYE-LID DOME, see additional information
       Daylight Filter Type       : Oven controlled spectral filter
       Dayl. Filt. Bandwidth  [nm]: 0.15
       Adjustable Attenuation     : NO
       Adjustable Field of View   : 
       Transmit Efficiency        : 0.7
       Receive Efficiency         : 0.7
       Date Installed             : 1983-01-01
       Date Removed               : 2010-09-01
       Additional Information     : The dome`s hemisphere is divided into 4
                                  : segments the bottom two of which are fixed 
                                  : to a circular rail and the top two open by 
                                  : sliding over the bottom two.
                                  : The whole structure can be rotated manually, 
                                  : normally only necessary to protect the 
                                  : telescope/observer from the wind
                                  : since this scheme means that all the sky
                                  : above 25 degrees elevation is available with
                                  : the dome in any position. In normal operation
                                  : the lowest part of the opening are aligned
                                  : East-West to provide access to the ground
                                  : targets.
 
  4.02 Receiving Telescope Type   : CASSEGRAIN
         Aperture              [m]: 0.5
         Mount                    : AZ-EL
       Date Installed             : 2010-09-01
       Date Removed               : 
       Xmitting Telescope Type    : REFRACTOR
         Aperture              [m]: 0.1
       Date Installed             : 2010-09-01
       Date Removed               : 
       Tracking Camera Type       : TV on wide field Celestron
         Model                    : 
         Manufacturer             : 
         Field of View       [deg]: 2.0
         Minimum Magnitude   [mag]: 8
       Date Installed             : 
       Date Removed               : 
       Transmit/Receive Path      : SEPARATE
       Transmit/Receive Switch    : NONE
       Max Slew Rate Az    [deg/s]: 20
       Max Slew Rate El    [deg/s]:  5
       Max Used Tracking Rate Az  : 20
       Max Used Tracking Rate El  : 5
       Telescope Shelter          : EYE-LID DOME
       Daylight Filter Type       : Oven controlled spectral filter
       Dayl. Filt. Bandwidth  [nm]: 0.15
       Adjustable Attenuation     : NO
       Adjustable Field of View   : 
       Transmit Efficiency        : 0.7
       Receive Efficiency         : 0.7
       Date Installed             : 2010-09-01
       Date Removed               : 
       Additional Information     : The diocroic beam-splitter in the receive
                                  : path has been replaced by a modern 
                                  : equivalent. The diocroic reflects 
                                  : non-green light to an intensified camera
                                  : to enable star and satellite imaging 
                                  : The new optic`s transmit efficiency is 
                                  : greater than 95% and its polarisation 
                                  : discrimination is very low. There is 
                                  : sufficient reflection (~2%) of 
                                  : backscattered green laser light to enable
                                  : the `beam` to be visible in the camera.  
 
 
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  5.   Laser System Information
 
  5.01 Laser Type                 : ND:YAG
       Model                      : 
       Manufacturer               : 
       Number of Amplifiers       : 2
       Primary Wavelength     [nm]: 1064
       Primary Maximum Energy [mJ]: 
       Secondary Wavelength   [nm]: 532
       Secondary Max. Energy  [mJ]: 20
       Xmit Energy Adjustable     : NO
         Additional Information   : 
       Pulse Width (FWHM)     [ps]: 100
       Max. Repetition Rate   [Hz]: 14
       Fullw. Beam Divergence  ["]: 5 - 200
         Theoretical Beam Div     : 
         Measured Beam Div        : 
           Method Used            : 
           Additional Information : 
       Final Beam Diameter     [m]: 0.03
       Eyesafe                    : NO
       Eyesafe Standard           : British Standard 4803
       Polarization on Exit       : 
       Laser Fire Control         : 
       Laser Energy Monitor       : 
       Start Diode Type           : 
         Manufactorer             : 
         Model                    : 
         Quantum Efficiency    [%]: 
         Rise/Fall Time       [ps]: 
         Date Installed           : 
         Date Removed             : 
         Signal Processing        : 
           Manufacturer           : 
           Model                  : 
           Date Installed         : 
           Date Removed           : 
           Additional Information : 
       Date Installed             : 1982-01-01
       Date Removed               : 
       Additional Information     : An observer is always present at the 
                                  : telescope during ranging and using a slaved
                                  : radar system to detect aircraft close to
                                  : the beam and kill the laser. For terrestrial
                                  : calibration a ND filter is inserted
                                  : to render the beam eyesafe.
 
  5.02 Laser Type                 : ND:VAN
       Model                      : 
       Manufacturer               : 
       Number of Amplifiers       : 2
       Primary Wavelength     [nm]: 1064
       Primary Maximum Energy [mJ]: 
       Secondary Wavelength   [nm]: 532
       Secondary Max. Energy  [mJ]: 0.5
       Xmit Energy Adjustable     : NO
         Additional Information   : 
       Pulse Width (FWHM)     [ps]: 10
       Max. Repetition Rate   [Hz]: 2000
       Fullw. Beam Divergence  ["]: 5 - 200
         Theoretical Beam Div     : 
         Measured Beam Div        : 
           Method Used            : 
           Additional Information : 
       Final Beam Diameter     [m]: 0.03
       Eyesafe                    : NO
       Eyesafe Standard           : British Standard 4803
       Polarization on Exit       : 
       Laser Fire Control         : 
       Laser Energy Monitor       : 
       Start Diode Type           : 
         Manufactorer             : 
         Model                    : 
         Quantum Efficiency    [%]: 
         Rise/Fall Time       [ps]: 
         Date Installed           : 
         Date Removed             : 
         Signal Processing        : 
           Manufacturer           : 
           Model                  : 
           Date Installed         : 
           Date Removed           : 
           Additional Information : 
       Date Installed             : 2005-06-01
       Date Removed               : 2014-10-06
       Additional Information     : Each one of the two lasers is selectable
                                  : by the observer via the control interface
                                  : in real time during observing.
                                  : For example, for LRO ranging the 14Hz YAG
                                  : is employed and the 2kHz VAN for most 
                                  : other observing, depending on sky 
                                  : conditions. The control system `knows`
                                  : which laser was used for a given pass, 
                                  : and selects during reduction appropriate 
                                  : range calibration values from recent
                                  : calibration ranging, carried out for each
                                  : laser at least hourly.
 
  5.03 Laser Type                 : ND:YAG
       Model                      : 
       Manufacturer               : 
       Number of Amplifiers       : 2
       Primary Wavelength     [nm]: 1064
       Primary Maximum Energy [mJ]: 
       Secondary Wavelength   [nm]: 532
       Secondary Max. Energy  [mJ]: 1.0
       Xmit Energy Adjustable     : NO
         Additional Information   : 
       Pulse Width (FWHM)     [ps]: 10
       Max. Repetition Rate   [Hz]: 1000
       Fullw. Beam Divergence  ["]: 5 - 200
         Theoretical Beam Div     : 
         Measured Beam Div        : 
           Method Used            : 
           Additional Information : 
       Final Beam Diameter     [m]: 0.03
       Eyesafe                    : NO
       Eyesafe Standard           : British Standard 4803
       Polarization on Exit       : 
       Laser Fire Control         : 
       Laser Energy Monitor       : 
       Start Diode Type           : 
         Manufactorer             : 
         Model                    : 
         Quantum Efficiency    [%]: 
         Rise/Fall Time       [ps]: 
         Date Installed           : 
         Date Removed             : 
         Signal Processing        : 
           Manufacturer           : 
           Model                  : 
           Date Installed         : 
           Date Removed           : 
           Additional Information : 
       Date Installed             : 2014-10-06
       Date Removed               : 
       Additional Information     : Upgrade to Nd-Van 2kHz laser system,
                                  : now Nd-Yag and gives more energy in the
                                  : green (approx 1mj at 1 kHz).
                                  : While 2 kHz operation is possible with
                                  : less energy per pulse, we are currently
                                  : running at 1 kHz.
 
 
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  6.   Receiver System
 
  6.01.01 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : CSPAD
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 1999-07-30
            Date Removed          : 2001-01-03
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1995-01-01
            Date Removed          : 2007-02-01
          Additional Information  : Four Stanford counters of varying
                                  : ages were used historically - for 
                                  : details of usage see SCH and
                                  : SCI files. The telescope has a field of 
                                  : view of 10 arc minutes. However this is 
                                  : reduced to a maximum of 250 arcsecs 
                                  : by an iris in the light path.
                                  : For normal daytime observing
                                  : the iris size is reduced to 50 arcsecs. 
                                  : For normal night observing a 100 arcsecs
                                  : iris is used.
                                  : Whichever iris is used, the light is
                                  : focused onto the detector via a field lens.
 
  6.01.02 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : SPAD3b
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2001-01-03
            Date Removed          : 2001-01-24
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1995-01-01
            Date Removed          : 2007-02-01
          Additional Information  : Four Stanford counters of varying
                                  : ages were used historically - for details
                                  : of usage see SCH and SCI files.
                                  : The telescope has a field of 
                                  : view of 10 arc minutes. However this is 
                                  : reduced to a maximum of 250 arcsecs 
                                  : by an iris in the light path.
                                  : For normal daytime observing
                                  : the iris size is reduced to 50 arcsecs. 
                                  : For normal night observing a 100 arcsecs
                                  : iris is used.
                                  : Whichever iris is used, the light is
                                  : focused onto the detector via a field lens.
 
  6.01.03 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : CSPAD
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2001-01-24
            Date Removed          : 2002-10-04
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1995-01-01
            Date Removed          : 2007-02-01
          Additional Information  : Four Stanford counters of varying
                                  : ages were used historically - 
                                  : for details of usage see SCH and
                                  : SCI files. The telescope has a field of 
                                  : view of 10 arc minutes. However this is 
                                  : reduced to a maximum of 250 arcsecs 
                                  : by an iris in the light path.
                                  : For normal daytime observing
                                  : the iris size is reduced to 50 arcsecs. 
                                  : For normal night observing a 100 arcsecs 
                                  : iris is used.
                                  : Whichever iris is used, the light is
                                  : focused onto the detector via a field lens.
 
  6.01.04 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : SPAD3b
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2002-10-04
            Date Removed          : 2002-10-16
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1995-01-01
            Date Removed          : 2007-02-01
          Additional Information  : Four Stanford counters of varying
                                  : ages were used historically - 
                                  : for details of usage see SCH and SCI 
                                  : files. The telescope has a field of 
                                  : view of 10 arc minutes. However this is 
                                  : reduced to a maximum of 250 arcsecs 
                                  : by an iris in the light path.
                                  : For normal daytime observing
                                  : the iris size is reduced to 50 arcsecs. 
                                  : For normal night observing a 100 arcsecs 
                                  : iris is used.
                                  : Whichever iris is used, the light is
                                  : focused onto the detector via a field lens.
 
  6.01.05 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : CSPAD
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2002-10-16
            Date Removed          : 
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1995-01-01
            Date Removed          : 2007-02-01
          Additional Information  : Four Stanford counters of varying
                                  : ages were used historically - 
                                  : for details of usage see SCH and SCI 
                                  : files. The telescope has a field of 
                                  : view of 10 arc minutes. However this is 
                                  : reduced to a maximum of 250 arcsecs 
                                  : by an iris in the light path.
                                  : For normal daytime observing
                                  : the iris size is reduced to 50 arcsecs. 
                                  : For normal night observing a 100 arcsecs 
                                  : iris is used.
                                  : Whichever iris is used, the light is
                                  : focused onto the detector via a field lens.
 
  6.01.06 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : CSPAD
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2002-10-16
            Date Removed          : 2009-02-01
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : Event Timer
            Manufacturer          : Home Build around 3 Thales Modules:
            Model                 : 2x timing modules 2396-201-000 No.s 12 & 13
                                  : 1x clock module 3396-211-000 No. 6
            Resolution        [ps]: 1
            Precision         [ps]: 5
            Date Installed        : 2007-02-01
            Date Removed          : 
          Additional Information  : 
 
  6.01.07 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : SPAD
            Manufacturer          : PESO Consulting
            Model                 : 
            Quantum Efficiency [%]: 20
            Nominal Gain          : 
            Rise Time         [ps]: 1500
            Jitter (Single PE)[ps]: 30
            Field of View Diam ["]: 20 - 250
            Date Installed        : 2009-02-01
            Date Removed          : 
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : N.A.
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: YES
            Mode of Operation     : Single Photon
            Additional Information: 
          Time of Flight Observ.  : Event Timer
            Manufacturer          : Home build around 3 Thales Modules
            Model                 : 2x timing modules 2396-201-000 No.s 12 & 13
                                  : 1x clock module 3396-211-000 No. 6
            Resolution        [ps]: 1
            Precision         [ps]: 5
            Date Installed        : 2007-02-01
            Date Removed          : 
          Additional Information  : 
 
  6.02.01 Secondary Chain
          Wavelength          [nm]: 
          Detector Type           : 
            Manufacturer          : 
            Model                 : 
            Quantum Efficiency [%]: 
            Nominal Gain          : 
            Rise Time         [ps]: 
            Jitter (Single PE)[ps]: 
            Field of View Diam ["]: 
            Date Installed        : 
            Date Removed          : 
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : 
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : 
            Return-Rate Controlled: 
            Mode of Operation     : 
            Additional Information: 
          Time of Flight Observ.  : 
            Manufacturer          : 
            Model                 : 
            Resolution        [ps]: 
            Precision         [ps]: 
            Date Installed        : 
            Date Removed          : 
          Additional Information  : 
 
  6.03.01 Tertiary Chain
          Wavelength          [nm]: 
          Detector Type           : 
            Manufacturer          : 
            Model                 : 
            Quantum Efficiency [%]: 
            Nominal Gain          : 
            Rise Time         [ps]: 
            Jitter (Single PE)[ps]: 
            Field of View Diam ["]: 
            Date Installed        : 
            Date Removed          : 
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : 
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : 
            Manufacturer          : 
            Model                 : 
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : 
            Return-Rate Controlled: 
            Mode of Operation     : 
            Additional Information: 
          Time of Flight Observ.  : 
            Manufacturer          : 
            Model                 : 
            Resolution        [ps]: 
            Precision         [ps]: 
            Date Installed        : 
            Date Removed          : 
          Additional Information  : 
 
 
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  7.   Tracking Capabilities
 
  7.01 Satellites
         Very Low Alt (<400 km)   : YES
         Low Altitude (400-2000)  : YES
         LAGEOS/LARES             : YES
         GLONASS                  : YES
         Etalon                   : YES
         GNSS                     : YES
         Geosynchronous           : NIGHT
         Moon                     : NO
       Ave. Pass Switch Time   [s]: ~30
       Average values for LAGEOS
         Single Shot RMS      [mm]: 16
         # of Obs per NP          : 150
         Use of Semi-trains       : YES
         # of Semi-train Tracks   : 4
       Range Gate Width       [ns]: 200 - 30000
       Beam Pointing Accuracy  ["]: 2
       Angle Encoder Resolution["]: 2
       Min. Tracking Elev.   [deg]: 25
       Laser Polarization @emitter: 
       Operation
         Months per Year          : 12
         Days per Week            : 7
         Hours per Day            : 20
         Staff per Shift          : 1
         System Shared With       : NOTHING
         Time Allocated to SLR [%]: 100
         Remotely Controllable    : NO
       Tracking Restrictions
         Go/No-go flag            : YES
           Satellite Verification : 
           Date Verified          : 
         Maximum elevation        : YES
           Satellite Verification : 
           Date Verified          : 
         Pass segments            : YES
           Satellite Verification : 
           Date Verified          : 
         Schedule segments        : 
           Satellite Verification : 
           Date Verified          : 
         Maximum laser power limit: 
           Satellite Verification : 
         Date Verified            : 
       Date First Applicable      : 1982-01-01 HH:MM UT
       Date Last Applicable       : 
       Additional Information     : Hz laser
                                  : With no ND filters in the receive path
                                  : the daytime range-gate limit is of 
                                  : order 600ns. However for low satellites
                                  : and considerable ND (up to 10^4), a 
                                  : range gate of 3000ns is possible. In 
                                  : practice a small range gate 500ns for
                                  : low satellites is possible and the 
                                  : use of observer-entered time bias 
                                  : corrections is used to level the 
                                  : satellite O-C track satellite into 
                                  : the range gate. At night time a RG of 
                                  : up to 30000ns is possible without 
                                  : saturation.
 
  7.02 Satellites
         Very Low Alt (<400 km)   : YES
         Low Altitude (400-2000)  : YES
         LAGEOS/LARES             : YES
         GLONASS                  : YES
         Etalon                   : YES
         GNSS                     : YES
         Geosynchronous           : NIGHT
         Moon                     : NO
       Ave. Pass Switch Time   [s]: ~30
       Average values for LAGEOS
         Single Shot RMS      [mm]: 12
         # of Obs per NP          : 1000
         Use of Semi-trains       : NO
         # of Semi-train Tracks   : n/a
       Range Gate Width       [ns]: 200 - 2000
       Beam Pointing Accuracy  ["]: 2
       Angle Encoder Resolution["]: 2
       Min. Tracking Elev.   [deg]: 25
       Laser Polarization @emitter: 
       Operation
         Months per Year          : 12
         Days per Week            : 7
         Hours per Day            : 20
         Staff per Shift          : 1
         System Shared With       : NOTHING
         Time Allocated to SLR [%]: 100
         Remotely Controllable    : NO
       Tracking Restrictions
         Go/No-go flag            : YES
           Satellite Verification : 
           Date Verified          : 
         Maximum elevation        : YES
           Satellite Verification : 
           Date Verified          : 
         Pass segments            : YES
           Satellite Verification : 
           Date Verified          : 
         Schedule segments        : 
           Satellite Verification : 
           Date Verified          : 
         Maximum laser power limit: 
           Satellite Verification : 
         Date Verified            : 
       Date First Applicable      : 1982-01-01 HH:MM UT
       Date Last Applicable       : 
       Additional Information     : KhZ laser
                                  : With no ND filters in the receive path
                                  : the daytime range-gate limit is of order
                                  : 600ns. However for low satellites and
                                  : considerable ND (up to 10^4), a range 
                                  : gate of 2000ns is possible.
                                  : In practice a small range gate <500ns
                                  : for low satellites is possible and the 
                                  : use of observer-entered time bias 
                                  : corrections is used to level the 
                                  : satellite O-C track satellite into the 
                                  : range gate.
                                  : At night time a RG of up to 2000ns is
                                  : possible without saturation.
 
 
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  8.   Calibration
 
  8.01 Calibration Type           : PRE+POST
       Target Location            : EXTERNAL
       Target Type                : see additional information
       Target Structure           : BRICK BUILDING, see additional information
       Number of Targets          : 
       Target Distance(s)      [m]: 120
         Date Measured            : 1993-06-09
         Accuracy             [mm]: 2-3
         Verification             : 4 other targets
       Return-Rate Controlled     : YES
       Eye-Safe Method            : ND filters plus partial mirror
         Additional Information   : 
       Mode of Operation          : SINGLE PHOTON
       Calibration performed      : 60 see additional information
       Single Shot RMS        [mm]: 9
       Edit Criterion 1st Chain   : ITERATIVE 2.5 SIGMA
       Edit Criterion 2nd Chain   : N.A.
       Application of Cal Data    : LINEAR FIT
       Date Installed             : 1982-01-01
       Date Removed               : 2018-02-05
       Additional Information     : Targets are made of two polished steel
                                  : sheets at right angles so as to
                                  : translate the beam horizontally from
                                  : the emitter telescope to the receiving
                                  : telescope.  The 2 polished sheets are
                                  : mounted on brick building about 30 feet
                                  : above the ground, 120m from dome. The 
                                  : HERT IGS system is co-mounted and offers
                                  : local stability monitoring.
                                  : A secondary target of 2 polished sheets is
                                  : mounted on standard concrete survey
                                  : pillar about 3 feet above the ground
                                  : at 600m.
                                  : We will always attempt to get calibrations 
                                  : before and after satellite but when there 
                                  : are several satellites back-to-back we will 
                                  : calibrate before and after the batch. The 
                                  : realtime system gives alarm messages should
                                  : the time since last calibration exceed 60 
                                  : minutes
 
  8.03 Calibration Type           : PRE+POST
       Target Location            : EXTERNAL
       Target Type                : see additional information
       Target Structure           : BRICK BUILDING, see additional information
       Number of Targets          : 
       Target Distance(s)      [m]: 120
         Date Measured            : 2017-04-26
         Accuracy             [mm]: 1-2
         Verification             : 2 other targets
       Return-Rate Controlled     : YES
       Eye-Safe Method            : ND filters plus partial mirror
         Additional Information   : 
       Mode of Operation          : SINGLE PHOTON
       Calibration performed      : 60 see additional information
       Single Shot RMS        [mm]: 4
       Edit Criterion 1st Chain   : ITERATIVE 2.5 SIGMA
       Edit Criterion 2nd Chain   : N.A.
       Application of Cal Data    : LINEAR FIT
       Date Installed             : 2018-02-05
       Date Removed               : 
       Additional Information     : Targets are made of two polished steel
                                  : sheets at right angles so as to
                                  : translate the beam horizontally from
                                  : the emitter telescope to the receiving
                                  : telescope.  The 2 polished sheets are
                                  : mounted on brick building about 30 feet
                                  : above the ground, 120m from dome. The 
                                  : HERT IGS system is co-mounted and offers 
                                  : local stability monitoring. A new target 
                                  : of similar construction but easier to 
                                  : survey has been installed alongside the 
                                  : existing external target and surveyed 
                                  : in 2017.
                                  : The new target is adopted as primary 
                                  : calibration as of 2018-02-05.
 
 
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  9.   Time and Frequency Standards
 
  9.01.01 Frequency Standard Type : Crystal Oscillator
          Model                   : 2110
          Manufacturer            : Austron
          Short Term Stab.  [e-12]: 3
          Long Term Stab.   [e-12]: 1
          Time Reference          : GPS
          Synchronization         : GPS
          Epoch Accuracy      [ns]: 100 - 300
          Date Installed          : 1996-06-19
          Date Removed            : 2010-05-15
          Additional Information  : Epoch accuracy not measured explicitly.
                                  : A 10 MHz signal from the Datum GPS 
                                  : receiver is feed to the Austron 
                                  : Disciplined Frequency and that output
                                  : is used for our time interval frequency.
 
  9.01.02 Frequency Standard Type : Active Hydrogen maser (AHM)
          Model                   : iMaser
          Manufacturer            : T4Science
          Short Term Stab.  [e-12]: 0.003
          Long Term Stab.   [e-12]: 0.001
          Time Reference          : GPS
          Synchronization         : N/A
          Epoch Accuracy      [ns]: 50
          Date Installed          : 2010-05-15
          Date Removed            : 
          Additional Information  : A 10 MHz signal from the AHM is fed to
                                  : the event timer and used as a very
                                  : stable source of time interval frequency.
                                  : A 1pps signal from the AHM is fed to the
                                  : event timer in order to generate LR epochs. 
                                  : AHM drift is monitored relative to 
                                  : UTC (GPS) and as a result LR epochs are 
                                  : never allowed to drift relative to UTC(GPS)
                                  : by more than ~30ns but greatly benefit from
                                  : being independent of the ~20ns steering
                                  : events in the GPS timescale.
                                  : The AHM also drives the SGF IGS 
                                  : receiver HERS.
 
  9.02.01 GNSS Timing Rcvr Model  : 9390-52133
          Manufacturer            : Datum
          Date Installed          : 1995-01-01
          Date Removed            : 2018-12-05
          Additional Information  : 
 
  9.03.01 One-way System Calibration
          Date performed          : 
          Direction Calibrated    : 
          Additional Information  : 
 
 
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 10.   Preprocessing Information
 
 10.01 On-site NP Generation      : YES
       Data Screening             : Orbit solution (SOLVE) + Gaussian fit
       Return-Rate Rejection      : above 20% return rate
       Edit Criterion 1st Chain   : 3.0 SIGMA
       Edit Criterion 2nd Chain   : N.A.
       Upload interval            : after each pass 
       Date First Applicable      : 1982-01-01 HH:MM UT
       Date Last Applicable       : 
       Additional Information     : 
 
 
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 11.   Aircraft Detection
 
 11.01 Detection Type             : RADAR
       Manufacturer/Provider      : 
       Automatic Laser Shutoff    : 
       Alarms Recorded            : 
       Hazard Distance        [km]: 
       Date Installed             : 1984-01-01
       Date Removed               : 
       Additional Information     : RADAR interfaced to LR control s/w and 
                                  : automatically interrupts laser on detection
                                  : of aircraft within ~2 degrees of laser 
                                  : direction.
                                  : Observer always on the observing platform
                                  : when ranging to satellites
 
 11.02 Detection Type             : Aircraft ADS-B receiver
       Manufacturer/Provider      : 
       Automatic Laser Shutoff    : 
       Alarms Recorded            : 
       Hazard Distance        [km]: 
       Date Installed             : 2013-01-01
       Date Removed               : 
       Additional Information     : Aircraft locations in alt-az are computed
                                  : and displayed for the observer in ltime
                                  : Audible warning sounds when any aircraft
                                  : is predicted to pass close to direction of 
                                  : laser Observer always on the observing 
                                  : platform when ranging to satellites
 
 
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 12.   Meteorological Instrumentation
 
 12.01.01 Pressure Sensor Model   : DPI 141
          Manufacturer            : Druck
          Recording Interval      : EVERY 5 MINUTES
          Accuracy          [mbar]: 0.15
          Height Diff to SRP   [m]: 0
          Distance from SRP    [m]: 
          Date Installed          : 1999-06-29 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 
          Additional Information  : Pressures continuously compared with
                                  : results from second Druck and with local
                                  : mercury and UK Met Office barometers
 
 12.02.01 Temp Sensor Model       : HMP 140
          Manufacturer            : Vaisala
          Recording Interval      : EVERY 5 MINUTES
          Accuracy         [deg C]: 0.1
          Date Installed          : 1997-07-04 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 2001-12-18 HH:MM UT
          Additional Information  : Temperatures continuously compared with
                                  : results from another temperature sensor
 
 12.02.02 Temp Sensor Model       : MP103A-T7-W4W
          Manufacturer            : Rotronics
          Recording Interval      : EVERY 5 MINUTES
          Accuracy         [deg C]: 0.1
          Date Installed          : 2001-12-18 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 2010-09-07 HH:MM UT
          Additional Information  : Temperatures continuously compared with
                                  : results from another temperature sensor
 
 12.02.03 Temp Sensor Model       : MP103A-T7-W4W
          Manufacturer            : Rotronics
          Recording Interval      : EVERY 5 MINUTES
          Accuracy         [deg C]: 0.1
          Date Installed          : 2010-09-07 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 
          Additional Information  : Temperatures continuously compared with
                                  : results from another temperature sensor.
                                  : Upgrade of previous model.
 
 12.03.01 Humidity Sensor Model   : HMP 140
          Manufacturer            : Vaisala
          Recording Interval      : EVERY 5 MINUTES
          Accuracy       [% rel h]: 5
          Date Installed          : 1996-06-19 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 2001-12-18 HH:MM UT
          Additional Information  : Relative humidities continuously compared
                                  : with results from another device
 
 12.03.02 Humidity Sensor Model   : MP103A-T7-W4W
          Manufacturer            : Rotronics
          Recording Interval      : EVERY 5 MINUTES
          Accuracy       [% rel h]: 1.5
          Date Installed          : 2001-12-18 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 2010-09-07 HH:MM UT
          Additional Information  : Relative humidities continuously compared
                                  : with results from another device
 
 12.03.03 Humidity Sensor Model   : MP103A-T7-W4W
          Manufacturer            : Rotronics
          Recording Interval      : EVERY 5 MINUTES
          Accuracy       [% rel h]: 1.5
          Date Installed          : 2010-09-07 HH:MM UT
          Calibration Interval    : see below
          Date Removed            : 
          Additional Information  : Relative humidities continuously compared
                                  : with results from another device. 
                                  : Upgrade of previous model.
 
 
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 13.   Local Ties, Eccentricities, and Collocation Information
 
 13.01 Collocated Permanent Geodetic Systems
 
 13.01.01.01 GNSS                 : IGS+EUREF
             Date Installed       : 1992-07-29
             Date Removed         : 
             Additional Info      : HERS
 13.01.01.02 GNSS                 : IGS+EUREF
             Date Installed       : 2003-03-01
             Date Removed         : 
             Additional Info      : HERT
 13.01.02.01 DORIS                : NO
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 13.01.03.01 PRARE                : YES
             Date Installed       : 2005-06-01
             Date Removed         : 2005-11-01
             Additional Info      : PRARE System owned by UK Proudman
                                  : Oceanography Lab installed for 6 months
                                  : prior to shipping to South Atlantic
 13.01.04.01 VLBI                 : NO
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 13.01.05.01 Gravimeter           : YES
             Date Installed       : 2006-10-19
             Date Removed         : 
             Additional Info      : Absolute Gravimeter manufactured by Micro-g
                                  : solutions, FG-5 229. Installed in basement 
                                  : of SGF below ground level to the south 
                                  : east of the SLR and to the south and below 
                                  : the HERS GNSS receiver.
                                  : British Ordinance Survey positions for four
                                  : position studs measured to allow for three 
                                  : visiting gravimeters to be run alongside the
                                  : SGF 229 unit. 
                                  : Gravimeter room is constantly dehumidified
                                  : and temperature controlled Hum~55% 
                                  : temp~22degC Routine Operations began 2007
                                  : November. 
                                  : Nominally in use for 24hrs once per week.
                                  : Upgraded to FG5-X in early 2013.
 13.01.06.01 Other SLR            : 
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 
 13.02.01.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : HERS
          Instrumentation Type    : GPS+GLONASS
          Instrumentation Status  : PERMANENT
          DOMES Number            : 13212M007
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: 6.4992 +- 0.001
            dy                 [m]: 10.2707 +- 0.001
            dz                 [m]: -3.9410 +- 0.001
            Date Measured         : 2008-06-15
            Determined by         : IGN, France
          Date Installed          : 1998-07-01
          Date Removed            : 
          Additional Information  : IGS code for the GPS is HERS. The IGN major
                                  : re-measurement gave up to 6mm changes from 
                                  : the original UK OS tie-results of 1992
 
 13.02.02.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : HERT
          Instrumentation Type    : GPS+GLONASS (realtime stream)
          Instrumentation Status  : PERMANENT
          DOMES Number            : 13212M010
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: -2.6863 +- 0.001
            dy                 [m]: -124.8209 +- 0.001
            dz                 [m]: 13.0074 +- 0.001
            Date Measured         : 2008-06-15
            Determined by         : IGN, France
          Date Installed          : 2003-03-01
          Date Removed            : 
          Additional Information  : IGS code for the GPS is HERT. The IGN major
                                  : re-measurements gave up to 15mm changes 
                                  : from the previous 2002 GPS campaign results
 
 13.02.03.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : Absolute Gravimeter PIER 1
          Instrumentation Type    : FG-5
          Instrumentation Status  : FG-5 to be moved around piers
          DOMES Number            : 
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: 10.2216 +- 0.002
            dy                 [m]: 8.8863 +- 0.005
            dz                 [m]: -22.4002 +- 0.002
            Date Measured         : 2006-07-DD
            Determined by         : British Ordinance Survey
          Date Installed          : 2006-10-19
          Date Removed            : 
          Additional Information  : 
 
 13.02.04.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : Absolute Gravimeter PIER 2
          Instrumentation Type    : FG-5
          Instrumentation Status  : FG-5 to be moved around piers
          DOMES Number            : 
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: 
            dy                 [m]: 
            dz                 [m]: 
            Date Measured         : 2006-MM-DD
            Determined by         : British Ordinance Survey
          Date Installed          : 2006-10-19
          Date Removed            : 
          Additional Information  : 
 
 13.02.05.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : Absolute Gravimeter PIER 3
          Instrumentation Type    : FG-5
          Instrumentation Status  : FG-5 to be moved around piers
          DOMES Number            : 
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: 
            dy                 [m]: 
            dz                 [m]: 
            Date Measured         : 2006-MM-DD
            Determined by         : British Ordinance Survey
          Date Installed          : 2006-10-19
          Date Removed            : 
          Additional Information  : 
 
 13.02.06.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : Absolute Gravimeter PIER 4
          Instrumentation Type    : FG-5
          Instrumentation Status  : FG-5 to be moved around piers
          DOMES Number            : 
          CDP Number              : 
          Differential Components (ITRS)
            dx                 [m]: 
            dy                 [m]: 
            dz                 [m]: 
            Date Measured         : 2006-MM-DD
            Determined by         : British Ordinance Survey
          Date Installed          : 2006-10-19
          Date Removed            : 
          Additional Information  : 
 
 13.03.01.01 Eccentricities Between Other Monuments on Site
 
          From: Monument Name     : 
                DOMES Number      : 
                CDP Number        : 
          To:   Monument Name     : 
                DOMES Number      : 
                CDP Number        : 
          Differential Components (ITRS)
            dx                 [m]: 
            dy                 [m]: 
            dz                 [m]: 
            Date Measured         : 
            Determined by         : 
          Additional Information  : 
 
 
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 14.   Local Events Possibly Affecting Computed Position
 
 14.01 Date                       : 
       Event                      : 
       Additional Information     : 
 
 
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 15.   On-Site, Point of Contact Agency Information
 
       Agency                     : Natural Environment Research Council
       Mailing Address            : NERC Space Geodesy Facility
                                  : Herstmonceux Castle
                                  : Hailsham
                                  : East Sussex BN27 1RN
       Website                    : sgf.rgo.ac.uk
       Primary Contact
         Contact Name             : Dr Graham Appleby
         Telephone (primary)      : +44 (0)1323 833888
         Telephone (secondary)    : +44 (0)7803 932453
         Fax                      : +44 (0)1323 833929
         E-mail                   : gapp@nerc.ac.uk 
       Secondary Contact
         Contact Name             : Robert Sherwood
         Telephone (primary)      : +44 (0)1323 833888
         Telephone (secondary)    : 
         Fax                      : +44 (0)1323 833929
         E-mail                   : rshe@nerc.ac.uk 
       Tertiary Contact
         Contact Name             : 
         Telephone (primary)      : 
         Telephone (secondary)    : 
         Fax                      : 
         E-mail                   : 
       Additional Information     : 
 
 
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 16.   Responsible Agency (if different from 15.)
 
       Agency                     : Natural Environment Research Council,
                                  : British Geological Survey
       Mailing Address            : Director of Earth Hazards and Observatories 
                                  : British Geological Survey, 
                                  : West Mains Road, Edinburgh EH9 3LA
       Primary Contact
         Contact Name             : Dr David Kerridge
         Telephone (primary)      : +44 131 650 0220
         Telephone (secondary)    : 
         Fax                      : 
         E-mail                   : djk@bgs.ac.uk
       Secondary Contact
         Contact Name             : 
         Telephone (primary)      : 
         Telephone (secondary)    : 
         Fax                      : 
         E-mail                   : 
       Additional Information     : 
 
 
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 17.   More Information
 
       URL for More Information   : http://sgf.rgo.ac.uk/
       Hardcopy on File
         Site Map                 : YES
         Site Diagram             : YES
         Horizon Mask             : NO
         Monument Description     : NO
         Site Pictures            : YES
       Additional Information     : 
  9.02.02 GNSS Timing Rcvr Model  : S650
          Manufacturer            : Microsemi
          Date Installed          : 2018-12-05
          Date Removed            : 
          Additional Information  : 
 
 
 
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