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Potsdam: Site Log
Instructions and Update Site Log
You can use the hyperlinks to quickly get to the section of interest or you can scroll down to read them all.
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) : 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 :
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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 :
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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 :
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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 :
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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 :
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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]: 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 :
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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 :
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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 :
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 :
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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 :
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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 :
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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 :
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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 :
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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
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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 : 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
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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 : 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 :
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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.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 :
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