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Sejong: 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)    : Hyung-Chul Lim
       Preparer E-mail            : hclim@kasi.re.kr
       Date Prepared              : 2017-09-06
       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                  : Sejong
       IERS DOMES Number          : 23907S002
       CDP Pad ID                 : 7394
       Subnetwork                 : WPLTN
       Description                : AZ EL INTERSECT
       Monument Description       : N.A.
       Monument Inscription       : N.A.
       Mark Description           : N.A.
       Date Installed             : 2015-08-07
       Date Removed               : 
       Geologic Characteristic    : BEDROCK
       Additional Information     : DAEK station was moved to the SEJL station.
                                  : SEJL is located in Sejong city.
 
 
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  2.   Site Location Information
 
       City or Town               : Sejong
       State or Province          : Sejong
       Country                    : Republic of Korea
       Tectonic Plate             : Eurasian
       Local Time (UTC +/- hours) : 9
       Approximate Position
         X coordinate          [m]: -3110108.3836
         Y coordinate          [m]: 4082170.2894
         Z coordinate          [m]: 3774911.7489
         Latitude            [deg]: 36.520991 N
         Longitude           [deg]: 127.302913 E
         Elevation             [m]: 176.415
       Survey Method              : 
       Date Measured              : 
       Additional Information     : 
 
 
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  3.   General System Information
 
  3.01 System Name                : Sejong
       4-Character Code           : SEJL
       CDP System Number          : 26
       CDP Occupation Number      : 01
       Eccentricity to SRP (if Not Identical With SRP)
         North                 [m]: 
         East                  [m]: 
         Up                    [m]: 
         Date Measured            : N.A.
       Date Installed             : 2015-08-07
       Date Removed               : 
       Additional Information     : 
 
 
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  4.   Telescope Information
 
  4.01 Receiving Telescope Type   : CASSEGRAIN
         Aperture              [m]: 0.4
         Mount                    : AZ-EL
       Date Installed             : 2015-07-10
       Date Removed               : 
       Xmitting Telescope Type    : REFRACTOR
         Aperture              [m]: 0.1
       Date Installed             : 2015-07-10
       Date Removed               : 
       Tracking Camera Type       : CCD
         Model                    : PCO1600 for day; WAT-120N for night
         Manufacturer             : PCO for day; Watec for night
         Field of View       [deg]: 0.08
         Minimum Magnitude   [mag]: N.A.
       Date Installed             : 2011-08-10
       Date Removed               : 
       Transmit/Receive Path      : SEPARATE
       Transmit/Receive Switch    : NONE
       Max Slew Rate Az    [deg/s]: 20
       Max Slew Rate El    [deg/s]: 10
       Max Used Tracking Rate Az  : 20
       Max Used Tracking Rate El  : 10
       Telescope Shelter          : DOME
       Daylight Filter Type       : SPECTRAL FILTER, No Oven Control
       Dayl. Filt. Bandwidth  [nm]: 0.27
       Adjustable Attenuation     : NO
       Adjustable Field of View   : NO
       Transmit Efficiency        : 92.3
       Receive Efficiency         : 64.9
       Date Installed             : 2015-08-07
       Date Removed               : 
       Additional Information     : 
 
 
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  5.   Laser System Information
 
  5.01 Laser Type                 : ND:YAG
       Model                      : RG-L-532
       Manufacturer               : Photonics Industries 
       Number of Amplifiers       : 2
       Primary Wavelength     [nm]: 1064
       Primary Maximum Energy [mJ]: 
       Secondary Wavelength   [nm]: 532
       Secondary Max. Energy  [mJ]: 2.5
       Xmit Energy Adjustable     : NO
         Additional Information   : 
       Pulse Width (FWHM)     [ps]: 50
       Max. Repetition Rate   [Hz]: 5000
       Fullw. Beam Divergence  ["]: 5 - 200
         Theoretical Beam Div     : N.A.
         Measured Beam Div        : N.A.
           Method Used            : N.A.
           Additional Information : 
       Final Beam Diameter     [m]: 0.08
       Eyesafe                    : NO
       Eyesafe Standard           : N.A.
       Polarization on Exit       : UNKNOWN
       Laser Fire Control         : CONTROLLED
       Laser Energy Monitor       : OCCASSIONAL
       Start Diode Type           : pin diode
         Manufactorer             : KASI
         Model                    : N.A.
         Quantum Efficiency    [%]: N.A.
         Rise/Fall Time       [ps]: 35ps/5
         Date Installed           : 2012-09-15
         Date Removed             : N.A.
         Signal Processing        : Pulse Distrubution Unit
           Manufacturer           : KASI
           Model                  : N.A
           Date Installed         : 2012-09-26
           Date Removed           : 
           Additional Information : 
       Date Installed             : 2012-09-26
       Date Removed               : 
       Additional Information     : 
 
 
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  6.   Receiver System
 
  6.01.01 Primary Chain
          Wavelength          [nm]: 532
          Detector Type           : CSPAD
            Manufacturer          : PESO Consulting
            Model                 : N.A.
            Quantum Efficiency [%]: 20
            Nominal Gain          : N.A.
            Rise Time         [ps]: 100
            Jitter (Single PE)[ps]: 20
            Field of View Diam ["]: 90
            Date Installed        : 2012-09-26
            Date Removed          : 
          Amplifier Type          : 
            Manufacturer          : 
            Model                 : 
            Gain                  : N.A.
            Bandwidth             : 
            Date Installed        : 
            Date Removed          : 
            Additional Information: 
          Signal Processing       : Time Walk Compensated
            Manufacturer          : PESO Consulting
            Model                 : N.A.
            Date Installed        : 
            Date Removed          : 
            Amplitude Measurement : NO
            Return-Rate Controlled: NO
            Mode of Operation     : SINGLE to FEW PHOTON
            Additional Information: 
          Time of Flight Observ.  : EVENT
            Manufacturer          : Inst. of Electr. and Computer Science, Riga
            Model                 : A033-ET
            Resolution        [ps]: 1
            Precision         [ps]: 4
            Date Installed        : 2012-09-26
            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                  : NIGHT
         Etalon                   : NIGHT
         GNSS                     : NIGHT
         Geosynchronous           : NO
         Moon                     : NO
       Ave. Pass Switch Time   [s]: 30
       Average values for LAGEOS
         Single Shot RMS      [mm]: 15
         # of Obs per NP          : 300
         Use of Semi-trains       : NO
         # of Semi-train Tracks   : N.A.
       Range Gate Width       [ns]: 100 - 6000
       Beam Pointing Accuracy  ["]: 5
       Angle Encoder Resolution["]: 0.02
       Min. Tracking Elev.   [deg]: 20
       Laser Polarization @emitter: UNKNOWN
       Operation
         Months per Year          : 12
         Days per Week            : 7
         Hours per Day            : 24
         Staff per Shift          : 1
         System Shared With       : NOTHING
         Time Allocated to SLR [%]: 100
         Remotely Controllable    : NO
       Tracking Restrictions
         Go/No-go flag            : NO
           Satellite Verification : NONE
           Date Verified          : 
         Maximum elevation        : YES
           Satellite Verification : NONE
           Date Verified          : 
         Pass segments            : YES
           Satellite Verification : NONE
           Date Verified          : 
         Schedule segments        : YES
           Satellite Verification : NONE
           Date Verified          : 
         Maximum laser power limit: NO
           Satellite Verification : NO
         Date Verified            : 
       Date First Applicable      : 
       Date Last Applicable       : 
       Additional Information     : 
 
 
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  8.   Calibration
 
  8.01 Calibration Type           : PRE+POST
       Target Location            : EXTERNAL WITHIN DOME
       Target Type                : Prism and Diffuser
       Target Structure           : METAL POLE
       Number of Targets          : 1
       Target Distance(s)      [m]: 1.07
         Date Measured            : 2012-09-26
         Accuracy             [mm]: 0.5
         Verification             : Multiple lines
       Return-Rate Controlled     : NO
       Eye-Safe Method            : OTHER
         Additional Information   : 
       Mode of Operation          : FEW PHOTON
       Calibration performed      : 60
       Single Shot RMS        [mm]: 4.5
       Edit Criterion 1st Chain   : ITERATIVE 2.2 SIGMA
       Edit Criterion 2nd Chain   : N.A.
       Application of Cal Data    : LINEAR FIT
       Date Installed             : 2012-09-26
       Date Removed               : 
       Additional Information     : Target consists of a prism and a diffuser
                                  : to reduce the beam strength
 
 
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  9.   Time and Frequency Standards
 
  9.01.01 Frequency Standard Type : RUBIDIUM
          Model                   : XLi 
          Manufacturer            : SYMMETRICOM 
          Short Term Stab.  [e-12]: 6
          Long Term Stab.   [e-12]: 1
          Time Reference          : GPS
          Synchronization         : GPS
          Epoch Accuracy      [ns]: 30
          Date Installed          : 2012-09-26
          Date Removed            : 
          Additional Information  : 
 
  9.02.01 GNSS Timing Rcvr Model  : XLI 
          Manufacturer            : SYMMETRICOM
          Date Installed          : 2012-09-26
          Date Removed            : 
          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             : CPF+POLYNOMIAL
       Return-Rate Rejection      : NONE
       Edit Criterion 1st Chain   : ITERATIVE 2.2 SIGMA
       Edit Criterion 2nd Chain   : NONE
       Upload interval            : DAILY
       Date First Applicable      : 2012-10-12 10:00 UT
       Date Last Applicable       : 
       Additional Information     : 
 
 
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 11.   Aircraft Detection
 
 11.01 Detection Type             : RADAR
       Manufacturer/Provider      : Honeywell
       Automatic Laser Shutoff    : YES
       Alarms Recorded            : YES
       Hazard Distance        [km]: 40
       Date Installed             : 2012-09-26
       Date Removed               : 
       Additional Information     : 
 
 
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 12.   Meteorological Instrumentation
 
 12.01.01 Pressure Sensor Model   : WXT520
          Manufacturer            : VAISALA
          Recording Interval      : EVERY MINUTE
          Accuracy          [mbar]: 0.5
          Height Diff to SRP   [m]: 0.2
          Distance from SRP    [m]: 6
          Date Installed          : 2012-09-26 00:00 UT
          Calibration Interval    : TWO YEARLY
          Date Removed            : 
          Additional Information  : 
 
 12.02.01 Temp Sensor Model       : WXT520
          Manufacturer            : VAISALA
          Recording Interval      : EVERY MINUTE
          Accuracy         [deg C]: 0.3
          Date Installed          : 2012-09-26 00:00 UT
          Calibration Interval    : TWO YEARLY
          Date Removed            : 
          Additional Information  : 
 
 12.03.01 Humidity Sensor Model   : WXT520
          Manufacturer            : VAISALA
          Recording Interval      : EVERY MINUTE
          Accuracy       [% rel h]: 3
          Date Installed          : 2012-09-26 00:00 UT
          Calibration Interval    : TWO YEARLY
          Date Removed            : 
          Additional Information  : 
 
 
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 13.   Local Ties, Eccentricities, and Collocation Information
 
 13.01 Collocated Permanent Geodetic Systems
 
 13.01.01.01 GNSS                 : IGS
             Date Installed       : 2012-02-15
             Date Removed         : 
             Additional Info      : 
 13.01.01.02 GNSS                 : 
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 13.01.02.01 DORIS                : 
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 13.01.03.01 PRARE                : 
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 13.01.04.01 VLBI                 : YES
             Date Installed       : 2012-03-27
             Date Removed         : 
             Additional Info      : 
 13.01.05.01 Gravimeter           : 
             Date Installed       : 
             Date Removed         : 
             Additional Info      : 
 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           : SEJN
          Instrumentation Type    : GPS
          Instrumentation Status  : PERMANENT
          DOMES Number            : 23907M001
          CDP Number              : N.A.
          Differential Components (ITRS)
            dx                 [m]: 24.996 +- 0.01
            dy                 [m]: -74.281 +- 0.01
            dz                 [m]: 113.619 +- 0.01
            Date Measured         : 
            Determined by         : 
          Date Installed          : 
          Date Removed            : 
          Additional Information  : 
 
 13.02.02.01 Local Ties from the SRP to Other Monuments or Systems on Site
 
          Monument Name           : VLBI, SEJONG
          Instrumentation Type    : VLBI
          Instrumentation Status  : PERMANENT
          DOMES Number            : 23907S001
          CDP Number              : 7368
          Differential Components (ITRS)
            dx                 [m]: 27.089 +- 0.01
            dy                 [m]: -101.419 +- 0.01
            dz                 [m]: 166.989 +- 0
            Date Measured         : 
            Determined by         : 
          Date Installed          : 
          Date Removed            : 
          Additional Information  : 
 
 13.03.01.01 Eccentricities Between Other Monuments on Site
 
          From: Monument Name     : SEJN
                DOMES Number      : 23907M001
                CDP Number        : N.A.
          To:   Monument Name     : VLBI, SEJONG
                DOMES Number      : 23907S001
                CDP Number        : 7368
          Differential Components (ITRS)
            dx                 [m]: 2.093 +- 0.01
            dy                 [m]: -27.138 +- 0.01
            dz                 [m]: 53.370 +- 0.0
            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                     : Korea Astronomy and Space Science Institute
       Mailing Address            : 776 Daedeok-Daero Yuseong-gu Daejeon
                                  : 305-348 Republic of Korea
       Website                    : http://slr.re.kr/en/default.aspx
       Primary Contact
         Contact Name             : Hyung-Chul Lim
         Telephone (primary)      : +82-42-865-3235
         Telephone (secondary)    : 
         Fax                      : +82-42-861-5610
         E-mail                   : hclim@kasi.re.kr
       Secondary Contact
         Contact Name             : Ki-Pyoung Sung
         Telephone (primary)      : +82-42-865-2079
         Telephone (secondary)    : 
         Fax                      : +82-42-861-5610
         E-mail                   : kpsung@kasi.re.kr
       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                     : 
       Mailing Address            : 
       Primary Contact
         Contact Name             : 
         Telephone (primary)      : 
         Telephone (secondary)    : 
         Fax                      : 
         E-mail                   : 
       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://www.kasi.re.kr
       Hardcopy on File
         Site Map                 : NO
         Site Diagram             : NO
         Horizon Mask             : NO
         Monument Description     : NO
         Site Pictures            : NO
       Additional Information     : 
 
 
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