ILRS Site and System Information Form
      International Laser Ranging Service

 0.   Form

      Prepared by (Full Name)    : Guo Tangyong
      Preparer E-mail            : whslr@public.wh.hb.cn, guoty@21cn.com
      Date Prepared              : 2002-05-09
      Report Type                : UPDATE
      Site Log Format Version    : 2.0
      Site Log Revision          : 


 1.   Identification of the Ranging System Reference Point (SRP)

      Site Name                  : Lhasa (TROS) SLR Station
      IERS DOMES Number          : 21613M003
      CDP Pad ID                 : 7356
      Subnetwork                 : WPLTN
      Description                : MONUMENT
      Monument Description       : concrete 
      Monument Inscription       : Lhasa SLR 7356  2001.7
      Mark Description           : Circle hat with diameter 4cm
      Date Installed             : 2001-07-10
      Date Removed               : 
      Geologic Characteristic    : BEDROCK
      Additional Information     : 


 2.   Site Location Information

      City or Town               : Lhasa
      State or Province          : Xizang
      Country                    : China
      Tectonic Plate             : Eurasian
      Local Time (UTC +/- hours) : 
      Approximate Position
        X coordinate          [m]: -100535.761
        Y coordinate          [m]: 5550605.396
        Z coordinate          [m]: 3137037.869
        Latitude            [deg]: 29.6349 N
        Longitude           [deg]: 91.0377 E
        Elevation             [m]: 3604.144
      Survey Method              : 
      Date Measured              : 
      Additional Information     : 


 3.   General System Information

 3.01 System Name                : TROS
      4-Character Code           : LHAL
      CDP System Number          : 84
      CDP Occupation Number      : 01
      Eccentricity to SRP (if Not Identical With SRP)
        North                 [m]: 0.000 +- 0.001
        East                  [m]: 0.000 +- 0.001
        Up                    [m]: 1.9041 +- 0.001
        Date Measured            : 2001-08-03
      Date Installed             : 1999-12-28
      Date Removed               : 
      Additional Information     : 


 4.   Telescope Information

 4.01 Receiving Telescope Type   : spherical REFRACTOR
        Aperture              [m]: 0.38
        Mount                    : ALT-AZ
      Date Installed             : 
      Date Removed               : 
      Xmitting Telescope Type    : GALILEI
        Aperture              [m]: 0.10
      Date Installed             : 
      Date Removed               : 
      Tracking Camera Type       : ICCD
        Model                    : M40
        Manufacturer             : YNGYC
        Field of View       [deg]: 0.04
        Minimum Magnitude   [mag]: 13
      Date Installed             : 
      Date Removed               : 
      Transmit/Receive Path      : SEPARATE
      Transmit/Receive Switch    : NONE
      Max Slew Rate Az    [deg/s]: 5
      Max Slew Rate El    [deg/s]: 5
      Max Used Tracking Rate Az  : 2
      Max Used Tracking Rate El  : 2
      Telescope Shelter          : SEALED DOME
      Daylight Filter Type       : Unknown
      Dayl. Filt. Bandwidth  [nm]: 0.3
      Adjustable Attenuation     : TRANSMIT
      Adjustable Field of View   : 
      Transmit Efficiency        : 0.38
      Receive Efficiency         : N.A.
      Date Installed             : 2000-08-20
      Date Removed               : 
      Additional Information     : Receive Efficiency: unknown


 5.   Laser System Information

 5.01 Laser Type                 : ND:YAG
      Model                      : 
      Manufacturer               : 
      Number of Amplifiers       : 1
      Primary Wavelength     [nm]: 1064
      Primary Maximum Energy [mJ]: N.A.
      Secondary Wavelength   [nm]: 532.1
      Secondary Max. Energy  [mJ]: 15
      Xmit Energy Adjustable     : NO
        Additional Information   : 
      Pulse Width (FWHM)     [ps]: 30
      Max. Repetition Rate   [Hz]: 10
      Fullw. Beam Divergence  ["]: 10 - 60
        Theoretical Beam Div     : 
        Measured Beam Div        : 
          Method Used            : 
          Additional Information : 
      Final Beam Diameter     [m]: 0.07
      Eyesafe                    : NO
      Eyesafe Standard           : N.A.
      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             : 2000-05-01
      Date Removed               : 
      Additional Information     : Primary Maximum Energy: 
                                 :     not used for laser ranging


 6.   Receiver System

 6.01.01 Primary Chain
         Wavelength          [nm]: 532
         Detector Type           : CSPAD
           Manufacturer          : PESO Consulting
           Model                 : 0407
           Quantum Efficiency [%]: 20
           Nominal Gain          : 
           Rise Time         [ps]: 100
           Jitter (Single PE)[ps]: 22
           Field of View Diam ["]: 120
           Date Installed        : 2000-05-01
           Date Removed          : 
         Amplifier Type          : 
           Manufacturer          : 
           Model                 : 
           Gain                  : 
           Bandwidth             : 
           Date Installed        : 
           Date Removed          : 
           Additional Information: 
         Signal Processing       : Time Walk Compensated
           Manufacturer          : Graz
           Model                 : 
           Date Installed        : 2000-05-01
           Date Removed          : 
           Amplitude Measurement : N.A.
           Return-Rate Controlled: NO
           Mode of Operation     : Single to Multi Photons
           Additional Information: 
         Time of Flight Observ.  : INTERVAL
           Manufacturer          : Stanford
           Model                 : 620
           Resolution        [ps]: 4
           Precision         [ps]: 30
           Date Installed        : 2000-02-01
           Date Removed          : 
         Additional Information  : Rise Time: <100

 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  : 


 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           : 
        Moon                     : NO
      Ave. Pass Switch Time   [s]: 20
      Average values for LAGEOS
        Single Shot RMS      [mm]: 30
        # of Obs per NP          : 60
        Use of Semi-trains       : YES
        # of Semi-train Tracks   : 4
      Range Gate Width       [ns]: 10 - 10000
      Beam Pointing Accuracy  ["]: 5
      Angle Encoder Resolution["]: 1
      Min. Tracking Elev.   [deg]: 12
      Laser Polarization @emitter: 
      Operation
        Months per Year          : 12
        Days per Week            : 7
        Hours per Day            : 15
        Staff per Shift          : 1
        System Shared With       : NOTHING
        Time Allocated to SLR [%]: 100
        Remotely Controllable    : NO
      Tracking Restrictions
        Go/No-go flag            : 
          Satellite Verification : 
          Date Verified          : 
        Maximum elevation        : 
          Satellite Verification : 
          Date Verified          : 
        Pass segments            : 
          Satellite Verification : 
          Date Verified          : 
        Schedule segments        : 
          Satellite Verification : 
          Date Verified          : 
        Maximum laser power limit: 
          Satellite Verification : 
        Date Verified            : 
      Date First Applicable      : 2000-01-15 HH:MM UT
      Date Last Applicable       : 
      Additional Information     : 


 8.   Calibration

 8.01 Calibration Type           : PRE+POST
      Target Location            : EXTERNAL
      Target Type                : FLAT SURFACE
      Target Structure           : METAL POLE
      Number of Targets          : 
      Target Distance(s)      [m]: 0.560
        Date Measured            : 2000-02-01
        Accuracy             [mm]: 4
        Verification             : 
      Return-Rate Controlled     : NO
      Eye-Safe Method            : 
        Additional Information   : 
      Mode of Operation          : DON`T KNOW
      Calibration performed      : 180
      Single Shot RMS        [mm]: 15
      Edit Criterion 1st Chain   : ITERATIVE 2.2 SIGMA
      Edit Criterion 2nd Chain   : N.A.
      Application of Cal Data    : AVERAGE
      Date Installed             : 2000-01-25
      Date Removed               : 
      Additional Information     : 


 9.   Time and Frequency Standards

 9.01.01 Frequency Standard Type : Oven Controlled Crystal Oscillator
         Model                   : 58503
         Manufacturer            : HP 
         Short Term Stab.  [e-12]: 5
         Long Term Stab.   [e-12]: 1
         Time Reference          : GPS
         Synchronization         : GPS
         Epoch Accuracy      [ns]: 150
         Date Installed          : 1999-07-01
         Date Removed            : 
         Additional Information  : 

 9.02.01 GNSS Timing Rcvr Model  : 58503
         Manufacturer            : HP
         Date Installed          : 1999-07-01
         Date Removed            : 
         Additional Information  : 

 9.03.01 One-way System Calibration
         Date performed          : 
         Direction Calibrated    : 
         Additional Information  : 


10.   Preprocessing Information

10.01 On-site NP Generation      : YES
      Data Screening             : IRV+POLYNOMIAL
      Return-Rate Rejection      : 
      Edit Criterion 1st Chain   : MANUAL
      Edit Criterion 2nd Chain   : N.A.
      Upload interval            : HOURLY
      Date First Applicable      : 2000-08-31 HH:MM UT
      Date Last Applicable       : 
      Additional Information     : 


11.   Aircraft Detection

11.01 Detection Type             : MOUNT OBSERVER
      Manufacturer/Provider      : 
      Automatic Laser Shutoff    : 
      Alarms Recorded            : 
      Hazard Distance        [km]: 
      Date Installed             : 1999-07-01
      Date Removed               : 
      Additional Information     : 


12.   Meteorological Instrumentation

12.01.01 Pressure Sensor Model   : WUPTH
         Manufacturer            : C&D
         Recording Interval      : PER PASS
         Accuracy          [mbar]: ~ 0.8
         Height Diff to SRP   [m]: ~ -0.9
         Distance from SRP    [m]: 
         Date Installed          : 2000-07-01 HH:MM UT
         Calibration Interval    : YEARLY
         Date Removed            : 
         Additional Information  : 

12.02.01 Temp Sensor Model       : WUPTH
         Manufacturer            : C&D
         Recording Interval      : PER PASS
         Accuracy         [deg C]: 0.2
         Date Installed          : 2000-07-01 HH:MM UT
         Calibration Interval    : YEARLY
         Date Removed            : 
         Additional Information  : 

12.03.01 Humidity Sensor Model   : WUPTH
         Manufacturer            : C&D
         Recording Interval      : PER PASS
         Accuracy       [% rel h]: 4
         Date Installed          : 2000-07-01 HH:MM UT
         Calibration Interval    : YEARLY
         Date Removed            : 
         Additional Information  : 


13.   Local Ties, Eccentricities, and Collocation Information

13.01 Collocated Permanent Geodetic Systems

13.01.01.01 GNSS                 : IGS
            Date Installed       : 1995-05-02
            Date Removed         : 
            Additional Info      : 
13.01.01.02 GNSS                 : NO
            Date Installed       : 
            Date Removed         : 
            Additional Info      : 
13.01.02.01 DORIS                : NO
            Date Installed       : 
            Date Removed         : 
            Additional Info      : 
13.01.03.01 PRARE                : NO
            Date Installed       : 
            Date Removed         : 
            Additional Info      : 
13.01.04.01 VLBI                 : NO
            Date Installed       : 
            Date Removed         : 
            Additional Info      : 
13.01.05.01 Gravimeter           : NO
            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           : LHAS
         Instrumentation Type    : GPS
         Instrumentation Status  : PERMANENT
         DOMES Number            : 21613M001
         CDP Number              : N.A.
         Differential Components (ITRS)
           dx                 [m]: 6402.057 +- 0.000218
           dy                 [m]: 1334.271 +- 0.001620
           dz                 [m]: -2178.113 +- 0.000937
           Date Measured         : 2001-08-04
           Determined by         : Inst. of Seis., China Seismological Bureau
         Date Installed          : 
         Date Removed            : 
         Additional Information  : The dx,dy and dz are the system reference
                                 : point(AZ EL INTERSECT) minus LHAS(GPS IGS)

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  : 


14.   Local Events Possibly Affecting Computed Position

14.01 Date                       : 
      Event                      : 
      Additional Information     : 


15.   On-Site, Point of Contact Agency Information

      Agency                     : Institute of Seismology,
                                 : China Seismological Bureau   
      Mailing Address            : No. 70 Central Xiao Hong Shan district,
                                 : Wuhan 430071, P.R. China
      Website                    : 
      Primary Contact
        Contact Name             : SLR group
        Telephone (primary)      : 
        Telephone (secondary)    : 
        Fax                      : 
        E-mail                   : whslr@public.wh.hb.cn, guoty@21cn.com
      Secondary Contact
        Contact Name             : 
        Telephone (primary)      : 
        Telephone (secondary)    : 
        Fax                      : 
        E-mail                   : 
      Tertiary Contact
        Contact Name             : 
        Telephone (primary)      : 
        Telephone (secondary)    : 
        Fax                      : 
        E-mail                   : 
      Additional Information     : 


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     : 


17.   More Information

      URL for More Information   : N.A.
      Hardcopy on File
        Site Map                 : 
        Site Diagram             : 
        Horizon Mask             : 
        Monument Description     : 
        Site Pictures            : 
      Additional Information     :