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Helwan: 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)    : Dr. Makram Ibrahim                                         
       Preparer E-mail            : makram@nriag.sci.eg, makikh@yahoo.com
       Date Prepared              : 2017-07-27
       Report Type                : UPDATE
       Format Version             : 2.0
 
 
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  1.   Identification of the Ranging System Reference Point (SRP)
 
       Site Name                  : Helwan SLR
       IERS DOMES Number          : 30101S001
       CDP Pad ID                 : 7831
       Subnetwork                 : EUROLAS
       Description                : AZ EL INTERSECT
       Monument Description       : N.A.
       Monument Inscription       : N.A.
       Mark Description           : N.A.
       Date Installed             : 1983-05-01
       Date Removed               : (yyyy-mm-dd)
       Geologic Characteristic    : Sandstone
       Additional Information     : The system is operated in annual
                                  : Campaigns in cooperation with the Czech
                                  : Technical University in Prague 
 
 
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  2.   Site Location Information
 
       City or Town               : Helwan - Cairo
       State or Province          : N.A.
       Country                    : Egypt
       Tectonic Plate             : Africa
       Approximate Position
         X coordinate          [m]: 4728297
         Y coordinate          [m]: 2879661
         Z coordinate          [m]: 3156862
         Latitude            [deg]: 29.8590 N
         Longitude           [deg]: 31.3427 E
         Elevation             [m]: 145.46
       Additional Information     : (multiple lines)
 
 
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  3.   General System Information
 
  3.01 System Name                : HELLAS
       4-Character Code           : HLWL
       CDP System Number          : 46
       CDP Occupation Number      : 01
       Eccentricity to SRP (if Not Identical With SRP)
         North                 [m]: (m +- m)
         East                  [m]: (m +- m)  
         Up                    [m]: (m +- m)
         Date Measured            : (yyyy-mm-dd) 
       Date Installed             : 1983-05-01
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : (a new Laser Radar Control(LRC) will be 
                                     installed at the Helwan SLR-STation.
                                      This will keep the station in better effeciency)
              
 
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  4.   Telescope Information
 
  4.01 Receiving Telescope Type   : Keplarian
         Aperture              [m]: 0.4
         Mount                    : AZ-EL
       Xmitting Telescope Type    : Gallieleo type, refracting 
         Aperture              [m]: 0.38
       Tracking Camera Type       : NONE
         Model                    :
         Manufacturer             :
         Field of View       [deg]:
         Minimum Magnitude   [mag]:
       Transmit/Receive Path      : SEPARATE
       Transmit/Receive Switch    : NONE
       Max Slew Rate Az    [deg/s]: 2
       Max Slew Rate El    [deg/s]: 2
       Max Used Tracking Rate Az  : 2
       Max Used Tracking Rate El  : 2
       Telescope Shelter          : ROLL-BACK ROOF
       Daylight Filter Type       : NONE
       Dayl. Filt. Bandwidth  [nm]:
       Adjustable Attenuation     :  NO
       Transmit Efficiency        : ~0.9
       Receive Efficiency         : ~0.8
       Date Installed             : 1983-05-01
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : Receiving telescope has two positive 
                                  : lenses with a pinhole to focus.
                                  : The beam expanding telescope is of 
                                  : Gallieleo type, refracting, antireflection
                                  : coated. The beam is directed by the mount 
                                  : (flat) mirrors in a Coude path. The Coude 
                                  : path is used for transmitting only.
 
 
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  5.   Laser System Information
 
  5.01 Laser Type                 : ND:YAG
       Number of Amplifiers       : 3
       Primary Wavelength     [nm]: 1064
       Primary Maximum Energy [mJ]: not used for ranging
       Secondary Wavelength   [nm]: 532
       Secondary Max. Energy  [mJ]: 80
       Xmit Energy Adjustable     : YES
       Pulse Width (FWHM)     [ps]: 20
       Max. Repetition Rate   [Hz]: 5
       Fullw. Beam Divergence  ["]: 60-180
       Final Beam Diameter     [m]: 0.25 
       Eyesafe                    : NO
       Eyesafe Standard           : (ANSI 136.1/N.A./etc)
       Date Installed             : 1983-05-01
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : The laser beam is expanded at the laser 
                                  : bench to its final diameter/divergence of
                                  : 25 mm, adjustable 0.5-3 arcminutes.
 
 
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  6.   Receiver System
 
  6.01.01 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : PMT
            Manufacturer          : Hamamatsu
            Model                 : H 6533
            Quantum Efficiency [%]: 10
            Nominal Gain          : 5.7E+06
            Rise Time         [ps]: 700
            Jitter (Single PE)[ps]: 30
            Field of View      ["]: 120
            Date Installed        : 1998-05-15
            Date Removed          : (yyyy-mm-dd)
          Signal Processing       : CFD 
            Manufacturer          : Tennelec
            Model                 : TC454
            Date Installed        : 1998-05-15
            Date Removed          : (yyyy-mm-dd)
            Amplitude Measurement : NO
            Return-rate Controlled: YES
            Mode of Operation     : Single to Multi Photons
          Time of Flight Observ.  : INTERVAL
            Manufacturer          : Stanford
            Model                 : 620
            Resolution        [ps]: 4
            Precision         [ps]: 30
            Date Installed        : 1999-05-15
            Date Removed          : (yyyy-mm-dd)
          Additional Information  : (multiple lines)
 
 
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  7.   Tracking Capabilities
 
  7.01 Satellites
         Very Low Alt (<400 km)   : NIGHT
         Low Altitude (400-2000)  : NIGHT
         Lageos                   : NIGHT
         GLONASS                  : NO
         Etalon                   : NO
         GPS                      : NO
         Moon                     : NO
       Avge Pass Switch Time   [s]:
       Average values for Lageos
         Single Shot RMS      [mm]: 18
         # of Obs per NP          :
         Use of Semi-trains       : YES
         # of Semi-train Tracks   : 3
       Range Gate Width       [ns]: 4
       Beam Pointing Accuracy  ["]: 60
       Angle Encoder Resolution["]: 4
       Min. Tracking Elev.   [deg]: 28
       Operation
         Months per Year          : 12
         Days per Week            : 7
         Hours per Day            : 10
         Staff per Shift          : 2
         System Shared With       : NOTHING
         Time Allocated to SLR [%]: 100
         Remotely Controllable    : NO
       Date First Applicable      : 1983-05-01 
       Date Last Applicable       : (yyyy-mm-dd)
       Additional Information     : The observations are carried out for all 
                                  : satellites except above 10000 km
 
 
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  8.   Calibration
 
  8.01 Calibration Type           : PRE or POST
       Target Location            : EXTERNAL
       Target Type                : see additional information
       Target Structure           : see additional information
       Target Distance         [m]: 1.01
         Date Measured            : 1999-11-13
         Accuracy (mm)        [mm]: 5
         Verification             : 
       Return-rate Controlled     : YES
       Mode of Operation          : SINGLE
       Average Cal Interval  [min]:
       Single Shot RMS        [mm]: 7
       Edit Criterion 1st Chain   : 3.0 SIGMA
       Edit Criterion 2nd Chain   : 2.5 SIGMA
       Application of Cal Data    : LINEAR FIT
       Date Installed             : 1998-05-15
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : Pre/Post pass calibration to external 
                                  : target; ranging to effective distance 
                                  : 1.01 m, with 100 echos. Flags regularly 
                                  : in MERIT II format.
                                              
  
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  9.   Time and Frequency Standards
 
  9.01.01 Frequency Standard Type : Oven Controlled Crystal Oscillator
          Model                   : 58503B
          Manufacturer            : HP                          
          Short Term Stab.  [e-12]: 5
          Long Term Stab.   [e-12]: 1
          Time Reference          : GPS
          Synchronization         : GPS
          Epoch Accuracy      [ns]:
          Date Installed          : 1999-11-13
          Date Removed            : (yyyy-mm-dd)
          Additional Information  : (multiple lines)
 
  9.02.01 GPS Timing Rcvr Model   : 58503B
          Manufacturer            : HP 
          Date Installed          : 1999-11-13
          Date Removed            : (yyyy-mm-dd)
          Additional Information  : (multiple lines)
 
 
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 10.   Preprocessing Information
 
 10.01 On-site NP Generation      : YES
       Data Screening             : IRV+POLYNOMIAL
       Edit Criterion 1st Chain   : ITERATIVE 3.0 SIGMA
       Edit Criterion 2nd Chain   : N.A.
       Upload interval            : DAILY
       Date First Applicable      : (yyyy-mm-dd)
       Date Last Applicable       : (yyyy-mm-dd)
       Additional Information     : (multiple lines)
 
 
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 11.   Aircraft Detection
 
 11.01 Detection Type             : MOUNT OBSERVER
       Date Installed             : (yyyy-mm-dd)
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : (multiple lines)
 
 
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 12.   Meteorological Instrumentation
 
 12.01.01 Pressure Sensor Model   : DIGIQUARTZ MET3
          Manufacturer            : Paroscientific
          Recording Interval      : every 10 seconds 
          Accuracy          [mbar]: 0.1
          Height Diff to SRP   [m]: 1.2
          Date Installed          : 1999-11-13 
          Calibration Interval    : every few years
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : (multiple lines)
 
 12.02.01 Temp Sensor Model       : Platinum Resistance Temperature Probe
          Manufacturer            : Paroscientific
          Recording Interval      : every 10 seconds
          Accuracy         [deg C]: <=0.5
          Date Installed          : 1999-11-15
          Calibration Interval    : every few years
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : (multiple lines)
 
 12.03.01 Humidity Sensor Model   : Capacitance Probe
          Manufacturer            : Paroscientific
          Recording Interval      : every 10 seconds
          Accuracy       [% rel h]: 2 at 25 deg C
          Date Installed          : 1999-11-15
          Calibration Interval    : every few years 
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : (multiple lines)
 
 
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 13.   Local Ties, Eccentricities, and Collocation Information
 
 13.01 Collocated Permanent Geodetic Systems
 
       GPS                        : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       GLONASS                    : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       DORIS                      : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       PRARE                      : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       VLBI                       : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       Gravimeter                 : NO
         Date Installed           : (yyyy-mm-dd)
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
 
 
 13.02.xx Local Ties from the SRP to Other Monuments or Systems on Site
   
          Monument Name           :
          Instrumentation Type    : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/NONE)
          Instrumentation Status  : (PERMANENT/MOBILE)
          DOMES Number            : (XXXXXXXXX)
          CDP Number              : (XXXX)
          Differential Components (ITRS)
            dx                 [m]: (m +- m)
            dy                 [m]: (m +- m)
            dz                 [m]: (m +- m)
            Date Measured         : (yyyy-mm-dd)
            Determined by         :
          Date Installed          : (yyyy-mm-dd)
          Date Removed            : (yyyy-mm-dd)
          Additional Information  : (multiple lines)
 
 
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 14.   Local Events Possibly Affecting Computed Position
 
 14.01 Date                       : (yyyy-mm-dd hh:mm UT)
       Event                      : (EARTHQUAKE/CONSTRUCTION/etc)
       Additional Information     : (multiple lines)
 
 
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 15.   On-Site, Point of Contact Agency Information
 
       Agency                     : NRIAG
       Mailing Address            : National Research Institute of Astronomy and Geophysics 
                                  : , 11421, Elmarsed St., Helwan, Cairo, Egypt.  
       Primary Contact
         Contact Name             : Dr. Makram Ibrahim 
         Telephone (primary)      : +201005799722 
         Telephone (secondary)    
         Fax                      : +20 2 25548020  
         E-mail                   : makram@nriag.sci.eg
                                  : makikh@yahoo.com
       Secondary Contact
         Contact Name             :  
         Telephone (primary)      : 
         Telephone (secondary)     
         Fax                      : 
         E-mail                   :  
                                     
       Additional Information     : 
                                         
 
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 16.   Responsible Agency (if different from 15.)
 
       Agency                     : Czech Technical University
       Mailing Address            : Faculty of Nuclear Sciences and
                                  : Physical Engineering
                                  : Brehova 7
                                  : 115 19 Prague 1
                                  : Czech Republic
       Primary Contact
         Contact Name             : Dr. Josef Blazej 
         Telephone (primary)      : +420 224 358 659 
         Telephone (secondary)    :  
         Fax                      : +420 2 83072252
         E-mail                   : blazej@fjfi.cvut.cz
       Secondary Contact
         Contact Name             :
         Telephone (primary)      :
         Telephone (secondary)    :
         Fax                      :
         E-mail                   :
       Additional Information     : (multiple lines)
 
 
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 17.   More Information
 
       URL for More Information   : N.A.
       Hardcopy on File
         Site Map                 :  NO
         Site Diagram             :  NO
         Horizon Mask             :  NO
         Monument Description     :  NO
         Site Pictures            :  NO
       Additional Information     : (multiple lines)
 
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