ILRS Site and System Information Form
      International Laser Ranging Service

 0.   Form

      Prepared by (Full Name)    : Ludwig Gruwaldt
      Preparer E-mail            : grun@gfz-potsdam.de
      Date Prepared              : 2013-09-05
      Report Type                : UPDATE
      Site Log Format Version    : 2.0
      Site Log Revision          : 


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

      Site Name                  : Potsdam SLR
      IERS DOMES Number          : 14106S009
      CDP Pad ID                 : 7836
      Subnetwork                 : EUROLAS
      Description                : AZ EL INTERSECT
      Monument Description       : Intersection of the az/el axes of the mount
      Monument Inscription       : N.A.
      Mark Description           : BRASS NAIL (2) in pillar below telescope
      Date Installed             : 1992-05-08
      Date Removed               : 
      Geologic Characteristic    : SAND
      Additional Information     : 


 2.   Site Location Information

      City or Town               : Potsdam
      State or Province          : Brandenburg
      Country                    : Germany
      Tectonic Plate             : Eurasian
      Local Time (UTC +/- hours) : 
      Approximate Position
        X coordinate          [m]: 3800639.8
        Y coordinate          [m]: 881981.9
        Z coordinate          [m]: 5028831.6
        Latitude            [deg]: 52.3800 N
        Longitude           [deg]: 13.0649 E
        Elevation             [m]: 133.7
      Survey Method              : 
      Date Measured              : 
      Additional Information     : 


 3.   General System Information

 3.01 System Name                : GFZLAS
      4-Character Code           : POTL
      CDP System Number          : 58
      CDP Occupation Number      : 01
      Eccentricity to SRP (if Not Identical With SRP)
        North                 [m]: 
        East                  [m]: 
        Up                    [m]: 
        Date Measured            : N.A.
      Date Installed             : 1992-05-08
      Date Removed               : 
      Additional Information     : 


 4.   Telescope Information

 4.01 Receiving Telescope Type   : CASSEGRAIN/MANGIN
        Aperture              [m]: 1
        Mount                    : AZ-EL
      Date Installed             : 
      Date Removed               : 
      Xmitting Telescope Type    : CASSEGRAIN/MANGIN (common optics)
        Aperture              [m]: 1 m
      Date Installed             : 
      Date Removed               : 
      Tracking Camera Type       : MCP Image Intensifier + CCD
        Model                    : Proxicam
        Manufacturer             : Proxitronic
        Field of View       [deg]: 0.3
        Minimum Magnitude   [mag]: 
      Date Installed             : 
      Date Removed               : 
      Transmit/Receive Path      : COMMON COUDE
      Transmit/Receive Switch    : ROTATING MIRROR
      Max Slew Rate Az    [deg/s]: 3
      Max Slew Rate El    [deg/s]: 3
      Max Used Tracking Rate Az  : 3
      Max Used Tracking Rate El  : 3
      Telescope Shelter          : ROLL-BACK ROOF
      Daylight Filter Type       : Interference FILTER,unblocked
      Dayl. Filt. Bandwidth  [nm]: 3
      Adjustable Attenuation     : RECEIVE
      Adjustable Field of View   : 
      Transmit Efficiency        : 0.5
      Receive Efficiency         : 0.2
      Date Installed             : 1992-05-08
      Date Removed               : 
      Additional Information     : 


 5.   Laser System Information

 5.01 Laser Type                 : ND:YAG
      Model                      : 
      Manufacturer               : 
      Number of Amplifiers       : 2
      Primary Wavelength     [nm]: 1064
      Primary Maximum Energy [mJ]: 20
      Secondary Wavelength   [nm]: 532
      Secondary Max. Energy  [mJ]: 10
      Xmit Energy Adjustable     : YES
        Additional Information   : 
      Pulse Width (FWHM)     [ps]: 35
      Max. Repetition Rate   [Hz]: 10
      Fullw. Beam Divergence  ["]: 10 - 60
        Theoretical Beam Div     : 
        Measured Beam Div        : 
          Method Used            : 
          Additional Information : 
      Final Beam Diameter     [m]: 1 m
      Eyesafe                    : NO
      Eyesafe Standard           : ANSI 136.1
      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             : 1992-05-08
      Date Removed               : 
      Additional Information     : 


 6.   Receiver System

 6.01.01 Primary Chain
         Wavelength          [nm]: 532
         Detector Type           : PMT
           Manufacturer          : Hamamatsu
           Model                 : H 5023
           Quantum Efficiency [%]: 8
           Nominal Gain          : 2e7
           Rise Time         [ps]: 700
           Jitter (Single PE)[ps]: 60
           Field of View Diam ["]: 
           Date Installed        : 1994-01-30
           Date Removed          : 
         Amplifier Type          : 
           Manufacturer          : 
           Model                 : 
           Gain                  : 
           Bandwidth             : 
           Date Installed        : 
           Date Removed          : 
           Additional Information: 
         Signal Processing       : CFD
           Manufacturer          : Tennelec
           Model                 : TC 454
           Date Installed        : 1994-01-30
           Date Removed          : 
           Amplitude Measurement : NO
           Return-Rate Controlled: YES
           Mode of Operation     : SINGLE/FEW PHOTON
           Additional Information: 
         Time of Flight Observ.  : INTERVAL
           Manufacturer          : Stanford Res.
           Model                 : SR 620
           Resolution        [ps]: 4
           Precision         [ps]: 30
           Date Installed        : 1992-05-08
           Date Removed          : 
         Additional Information  : 

 6.02.01 Secondary Chain
         Wavelength          [nm]: 532
         Detector Type           : Avalanche Photodiode
           Manufacturer          : RCA
           Model                 : C30902 S-TC
           Quantum Efficiency [%]: 28
           Nominal Gain          : N.A.
           Rise Time         [ps]: 
           Jitter (Single PE)[ps]: 150
           Field of View Diam ["]: 
           Date Installed        : 1992-05-08
           Date Removed          : 1994-01-30
         Amplifier Type          : 
           Manufacturer          : 
           Model                 : 
           Gain                  : 
           Bandwidth             : 
           Date Installed        : 
           Date Removed          : 
           Additional Information: 
         Signal Processing       : CFD
           Manufacturer          : Tennelec
           Model                 : TC 454
           Date Installed        : 1992-05-08
           Date Removed          : 
           Amplitude Measurement : NO
           Return-Rate Controlled: YES
           Mode of Operation     : SINGLE PHOTON
           Additional Information: 
         Time of Flight Observ.  : INTERVAL
           Manufacturer          : Stanford Res.
           Model                 : SR620
           Resolution        [ps]: 4
           Precision         [ps]: 30
           Date Installed        : 1992-05-08
           Date Removed          : 
         Additional Information  : RCA diode used only sparsely for distant
                                 : satellite ranging campaigns (as GPS)

 6.02.02 Secondary Chain
         Wavelength          [nm]: 532
         Detector Type           : Avalanche Photodiode
           Manufacturer          : Silicon Sensor
           Model                 : SSO-AD230
           Quantum Efficiency [%]: 25
           Nominal Gain          : N.A.
           Rise Time         [ps]: 190
           Jitter (Single PE)[ps]: 80
           Field of View Diam ["]: 
           Date Installed        : 1998-MM-DD
           Date Removed          : 
         Amplifier Type          : 
           Manufacturer          : 
           Model                 : 
           Gain                  : 
           Bandwidth             : 
           Date Installed        : 
           Date Removed          : 
           Additional Information: 
         Signal Processing       : CFD
           Manufacturer          : Tennelec
           Model                 : TC 454
           Date Installed        : 1992-05-08
           Date Removed          : 
           Amplitude Measurement : NO
           Return-Rate Controlled: YES
           Mode of Operation     : SINGLE PHOTON
           Additional Information: 
         Time of Flight Observ.  : INTERVAL
           Manufacturer          : Stanford Res.
           Model                 : SR620
           Resolution        [ps]: 4
           Precision         [ps]: 30
           Date Installed        : 1992-05-08
           Date Removed          : 
         Additional Information  : SSO diode not used for regular ranging 

 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                  : NIGHT
        Etalon                   : NIGHT
        GNSS                     : NIGHT
        Geosynchronous           : 
        Moon                     : NO
      Ave. Pass Switch Time   [s]: 300
      Average values for LAGEOS
        Single Shot RMS      [mm]: 20
        # of Obs per NP          : 50
        Use of Semi-trains       : NO
        # of Semi-train Tracks   : 3 - 4
      Range Gate Width       [ns]: 50 - 800000
      Beam Pointing Accuracy  ["]: 15
      Angle Encoder Resolution["]: 2
      Min. Tracking Elev.   [deg]: 20
      Laser Polarization @emitter: 
      Operation
        Months per Year          : 12
        Days per Week            : 6
        Hours per Day            : 12
        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      : 1994-06-28 HH:MM UT
      Date Last Applicable       : 2004-06-28 HH:MM UT
      Additional Information     : 


 8.   Calibration

 8.01 Calibration Type           : PRE+POST
      Target Location            : EXTERNAL WITHIN DOME
      Target Type                : Flat Surface
      Target Structure           : Room  Wall
      Number of Targets          : 
      Target Distance(s)      [m]: 2.5 m
        Date Measured            : N.A.
        Accuracy             [mm]: 3
        Verification             : Target calibrated by Cube Corner Reflector
                                 : in front of the telescope
      Return-Rate Controlled     : YES
      Eye-Safe Method            : 
        Additional Information   : 
      Mode of Operation          : SINGLE/FEW PHOTON
      Calibration performed      : 10
      Single Shot RMS        [mm]: 10
      Edit Criterion 1st Chain   : ITERATIVE 2.5 SIGMA
      Edit Criterion 2nd Chain   : ITERATIVE 2.5 SIGMA
      Application of Cal Data    : AVERAGE
      Date Installed             : 1992-05-08
      Date Removed               : 
      Additional Information     : 


 9.   Time and Frequency Standards

 9.01.01 Frequency Standard Type : Cesium
         Model                   : HP 5061A
         Manufacturer            : Hewlett Packard
         Short Term Stab.  [e-12]: 
         Long Term Stab.   [e-12]: 
         Time Reference          : GPS
         Synchronization         : GPS
         Epoch Accuracy      [ns]: 100
         Date Installed          : 1993-09-01
         Date Removed            : 1998-12-30
         Additional Information  : Cs standard out at end of 1998 (not replaced)

 9.01.02 Frequency Standard Type : GPS/QUARTZ
         Model                   : HP 58503A
         Manufacturer            : Hewlett Packard
         Short Term Stab.  [e-12]: 
         Long Term Stab.   [e-12]: 
         Time Reference          : GPS
         Synchronization         : GPS
         Epoch Accuracy      [ns]: 100
         Date Installed          : 1998-04-DD
         Date Removed            : 
         Additional Information  : 

 9.02.01 GNSS Timing Rcvr Model  : 9390
         Manufacturer            : Datum Inc.
         Date Installed          : 1992-05-08
         Date Removed            : 1998-12-30
         Additional Information  : this receiver together with internal Rb
                                 : standard was initially used as frequency
                                 : and time reference
                                 : Since installation of the Cs frequency
                                 : standard it was used to measure the time 
                                 : bias of the 1 pps pulses of the HP 5061.
                                 : Both units were replaced by the HP 58503
                                 :  in 1998

 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   : ITERATIVE 2.5 SIGMA
      Edit Criterion 2nd Chain   : ITERATIVE 2.5 SIGMA
      Upload interval            : AFTER EACH SHIFT
      Date First Applicable      : 1992-MM-DD 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             : 1992-05-08
      Date Removed               : 
      Additional Information     : 


12.   Meteorological Instrumentation

12.01.01 Pressure Sensor Model   : mercury station barometer
         Manufacturer            : Fuess ??
         Recording Interval      : PER PASS
         Accuracy          [mbar]: 0.2
         Height Diff to SRP   [m]: -2.5
         Distance from SRP    [m]: 
         Date Installed          : 1992-05-08 HH:MM UT
         Calibration Interval    : every few years
         Date Removed            : 1996-09-16 HH:MM UT
         Additional Information  : 

12.01.02 Pressure Sensor Model   : DPI 141
         Manufacturer            : Druck
         Recording Interval      : PER PASS
         Accuracy          [mbar]: 0.2
         Height Diff to SRP   [m]: -2.28
         Distance from SRP    [m]: 
         Date Installed          : 1996-09-16 HH:MM UT
         Calibration Interval    : every few years
         Date Removed            : 
         Additional Information  : 

12.02.01 Temp Sensor Model       : TM-200
         Manufacturer            : TIMETEC
         Recording Interval      : PER PASS
         Accuracy         [deg C]: 0.25 deg
         Date Installed          : 1996-09-16 HH:MM UT
         Calibration Interval    : SEVERAL YEARS
         Date Removed            : 
         Additional Information  : part of a PRARE meteo station

12.03.01 Humidity Sensor Model   : TM-200
         Manufacturer            : TIMETEC
         Recording Interval      : PER PASS
         Accuracy       [% rel h]: 1 %
         Date Installed          : 1996-09-16 HH:MM UT
         Calibration Interval    : SEVERAL YEARS
         Date Removed            : 
         Additional Information  : part of a PRARE meteo station


13.   Local Ties, Eccentricities, and Collocation Information

13.01 Collocated Permanent Geodetic Systems

13.01.01.01 GNSS                 : IGS/EUREF
            Date Installed       : 1994-10-14
            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                : YES
            Date Installed       : 1994-09-DD
            Date Removed         : 1998-12-DD
            Additional Info      : 
13.01.04.01 VLBI                 : NO
            Date Installed       : 
            Date Removed         : 
            Additional Info      : 
13.01.05.01 Gravimeter           : SUPERCONDUCTING (SLG)
            Date Installed       : 1992-06-01
            Date Removed         : 1998-10-30
            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           : GPS Potsdam
         Instrumentation Type    : GPS
         Instrumentation Status  : PERMANENT
         DOMES Number            : 14106M003
         CDP Number              : 
         Differential Components (ITRS)
           dx                 [m]: 50.091 +- 0.005
           dy                 [m]: 95.218 +- 0.005
           dz                 [m]: -40.439 +- 0.005
           Date Measured         : 1994-08-09
           Determined by         : 
         Date Installed          : 1994-10-14
         Date Removed            : 
         Additional Information  : (multiple lines)

13.02.02.01 Local Ties from the SRP to Other Monuments or Systems on Site

         Monument Name           : PRARE Potsdam
         Instrumentation Type    : PRARE
         Instrumentation Status  : PERMANENT
         DOMES Number            : 
         CDP Number              : 7730
         Differential Components (ITRS)
           dx                 [m]: -47.481 +- 0.005
           dy                 [m]: -57.390 +- 0.005
           dz                 [m]: 72.106 +- 0.005
           Date Measured         : 1994-04-13
           Determined by         : 
         Date Installed          : 1994-09-DD
         Date Removed            : 1998-12-DD
         Additional Information  : 

13.03.01.01 Eccentricities Between Other Monuments on Site

         From: Monument Name     : SLR Potsdam
               DOMES Number      : 14106S009
               CDP Number        : 7836
         To:   Monument Name     : SBG Potsdam
               DOMES Number      : 
               CDP Number        : 1181
         Differential Components (ITRS)
           dx                 [m]: -18.499 +- 0.005
           dy                 [m]: 23.424 +- 0.005
           dz                 [m]: 27.959 +- 0.005
           Date Measured         : 1994-04-13
           Determined by         : 
         Additional Information  : SBG Potsdam is the former SLR station


14.   Local Events Possibly Affecting Computed Position

14.01 Date                       : 
      Event                      : 
      Additional Information     : 


15.   On-Site, Point of Contact Agency Information

      Agency                     : GeoForschungsZentrum Potsdam
      Mailing Address            : Telegrafenberg
                                 : D-14473 Potsdam
      Website                    : 
      Primary Contact
        Contact Name             : Ludwig Grunwaldt
        Telephone (primary)      : +49/331/288-1733
        Telephone (secondary)    : +49/331/288-1164
        Fax                      : +49/331/288-1169
        E-mail                   : grun@gfz-potsdam.de
      Secondary Contact
        Contact Name             : Stefan Weisheit
        Telephone (primary)      : +49/331/288-1522
        Telephone (secondary)    : +49/331/288-1164
        Fax                      : 
        E-mail                   : weisheit@gfz-potsdam.de
      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   : http://www.gfz-potsdam.de/en/research/
                                 : organizational-units/departments-of-the-gfz/
                                 : department-1/global-geomonitoring-and-gravity
                                 : -field/topics/earth-system-parameters-and-
                                 : orbit-dynamics/history-of-satellite-laser-
                                 : ranging-in-potsdam/
      Hardcopy on File
        Site Map                 : NO
        Site Diagram             : NO
        Horizon Mask             : NO
        Monument Description     : NO
        Site Pictures            : NO
      Additional Information     :