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Wettzell: 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) : Johann Eckl
Preparer E-mail : johann.eckl@bkg.bund.de
Date Prepared : 2023-03-15
Report Type : UPDATE
Site Log Format Version : 2.0
Site Log Revision : 0
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1. Identification of the Ranging System Reference Point (SRP)
Site Name : Wettzell
IERS DOMES Number : 14201S018
CDP Pad ID : 8834
Subnetwork : EUROLAS
Description : AZ EL INTERSECT
Monument Description : N.A.
Monument Inscription : N.A.
Mark Description : N.A.
Date Installed : 1989-03-01
Date Removed :
Geologic Characteristic : BEDROCK
Additional Information : Intersection point is tied to a local
: survey network consisting of 20 network
: pillars. Survey accuracy is better than
: 1 mm.
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2. Site Location Information
City or Town : Koetzting
State or Province : Bavaria
Country : Germany
Tectonic Plate : Eurasian
Local Time (UTC +/- hours) :
Approximate Position
X coordinate [m]: 4075576.8
Y coordinate [m]: 931785.5
Z coordinate [m]: 4801583.6
Latitude [deg]: 49.1444 N
Longitude [deg]: 12.8780 E
Elevation [m]: 665
Survey Method :
Date Measured :
Additional Information :
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3. General System Information
3.01 System Name : WLRS
4-Character Code : WETL
CDP System Number : 10
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]:
East [m]:
Up [m]:
Date Measured : N.A.
Date Installed : 1989-03-01
Date Removed :
Additional Information :
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4. Telescope Information
4.01 Receiving Telescope Type : Coude afocal
Aperture [m]: 0.75
Mount : AZ-EL
Date Installed : 1989-03-01
Date Removed :
Xmitting Telescope Type : Coude afocal
Aperture [m]: 0.75
Date Installed :
Date Removed :
Tracking Camera Type : sCMOS
Model : Zyla 5.5
Manufacturer : ANDOR
Field of View [deg]: 0.05
Minimum Magnitude [mag]: 14
Date Installed : 2016-01-01
Date Removed :
Transmit/Receive Path : COMMON COUDE
Transmit/Receive Switch : POLARIZER
Max Slew Rate Az [deg/s]: 10
Max Slew Rate El [deg/s]: 5
Max Used Tracking Rate Az : 10
Max Used Tracking Rate El : 5
Telescope Shelter : Baader dome installed 2005/09/19
Daylight Filter Type : SPECTRAL FILTER and FABRY-PEROT
Dayl. Filt. Bandwidth [nm]: 0.15 - 0.3
Adjustable Attenuation : TRANSMIT & RECEIVE
Adjustable Field of View : yes
Transmit Efficiency : 0.5
Receive Efficiency : 0.5
Date Installed : 1989-03-01
Date Removed :
Additional Information :
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model : SC-3000ps YAG HE REGEN V2, SpitLight
Manufacturer : HIGH Q LASER, INNOLAS
Number of Amplifiers : 1
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 100
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 50
Xmit Energy Adjustable : YES
Additional Information : dual pulse option
Pulse Width (FWHM) [ps]: 10
Max. Repetition Rate [Hz]: 20
Fullw. Beam Divergence ["]: 1 - 40
Theoretical Beam Div : 1
Measured Beam Div : 2.5
Method Used : ILRS Procedure
Additional Information : beam collimated
Final Beam Diameter [m]: 0.75
Eyesafe : NO
Eyesafe Standard :
Polarization on Exit : LINEAR
Laser Fire Control :
Laser Energy Monitor : occassional
Start Diode Type : Silicon
Manufactorer : PESO-Consulting
Model : optical trigger device
Quantum Efficiency [%]:
Rise/Fall Time [ps]:
Date Installed : 2019-MM-DD
Date Removed :
Signal Processing : none
Manufacturer :
Model :
Date Installed :
Date Removed :
Additional Information :
Date Installed : 2013-11-DD
Date Removed :
Additional Information : used for LLR
5.02 Laser Type : ND:YAG
Model : SC-3000ps YAG HE REGEN V2
Manufacturer : High Q
Number of Amplifiers :
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 1.2
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 0.2
Xmit Energy Adjustable : YES
Additional Information : gradient ND filter to adjust Xmit
Pulse Width (FWHM) [ps]: 10
Max. Repetition Rate [Hz]: 667
Fullw. Beam Divergence ["]: 1 - 40
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.75
Eyesafe :
Eyesafe Standard :
Polarization on Exit : CIRCULAR
Laser Fire Control :
Laser Energy Monitor :
Start Diode Type : Silicon
Manufactorer : PESO Consulting
Model : optical trigger device
Quantum Efficiency [%]:
Rise/Fall Time [ps]:
Date Installed : 2019-06-07
Date Removed :
Signal Processing : none
Manufacturer :
Model :
Date Installed :
Date Removed :
Additional Information :
Date Installed : 2019-06-07
Date Removed :
Additional Information : used for SLR
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : MCP
Manufacturer : Photek
Model : PMT 210
Quantum Efficiency [%]: 14
Nominal Gain : 5e5
Rise Time [ps]: 100
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 30
Date Installed : 2009-03-24
Date Removed : 2019-06-06
Amplifier Type : none
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : Timing Discriminator
Manufacturer : Ortec
Model : 9327
Date Installed : 2009-03-24
Date Removed : 2019-06-06
Amplitude Measurement : NO
Return-Rate Controlled: YES
Mode of Operation : Single
Additional Information:
Time of Flight Observ. : EVENT
Manufacturer : Dassault/Thales
Model : WLRS-ET
Resolution [ps]: 1.22
Precision [ps]: 5.0
Date Installed : N.A.
Date Removed : 2019-06-06
Additional Information : used for LEO satellites
: and LAGEOS
6.01.02 Primary Chain
Wavelength [nm]: 1064
Detector Type : SPAD
Manufacturer : Princeton Lightwave
Model : PGA-080u-1064TOT
Quantum Efficiency [%]: 70
Nominal Gain : 1e8
Rise Time [ps]: 150
Jitter (Single PE)[ps]: 20
Field of View Diam ["]: 18
Date Installed : 2019-06-07
Date Removed :
Amplifier Type : N.A.
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement :
Return-Rate Controlled:
Mode of Operation :
Additional Information:
Time of Flight Observ. : EVENT
Manufacturer : Dassault/Thales
Model : WLRS-ET2
Resolution [ps]: 1.22
Precision [ps]: 2.0
Date Installed : 2019-06-07
Date Removed :
Additional Information :
6.02.01 Secondary Chain
Wavelength [nm]: 532
Detector Type : APD
Manufacturer : Lasercomponents
Model : SAP500T8
Quantum Efficiency [%]: 80
Nominal Gain : 1e8
Rise Time [ps]: 150
Jitter (Single PE)[ps]: 50
Field of View Diam ["]: 18
Date Installed : 2012-MM-DD
Date Removed : 2019-06-06
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing :
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : N.A.
Return-Rate Controlled: YES
Mode of Operation : SINGLE
Additional Information:
Time of Flight Observ. : EVENT
Manufacturer : Dassault/Thales
Model : WLRS-ET
Resolution [ps]: 1.22
Precision [ps]: 5
Date Installed : N.A.
Date Removed : 2019-06-06
Additional Information : used for HEO above 10000 km
6.02.02 Secondary Chain
Wavelength [nm]: 532
Detector Type : SPAD
Manufacturer : Lasercomponents
Model : SAP300T8
Quantum Efficiency [%]: 80
Nominal Gain : 1e8
Rise Time [ps]: 150
Jitter (Single PE)[ps]: 25
Field of View Diam ["]: 10 - 30
Date Installed : 2019-06-07
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. : EVENT
Manufacturer : Dassault/Thales
Model : WLRS-ET2
Resolution [ps]: 1.22
Precision [ps]: 2
Date Installed : 2019-06-07
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 : YES
Etalon : YES
GNSS : YES
Geosynchronous : YES
Moon : YES
Ave. Pass Switch Time [s]: ~ 50
Average values for LAGEOS
Single Shot RMS [mm]: 10
# of Obs per NP : 2400
Use of Semi-trains : NO
# of Semi-train Tracks : N.A.
Range Gate Width [ns]: 200 - 3000
Beam Pointing Accuracy ["]: 2
Angle Encoder Resolution["]: AZ 0.075 EL 0.090
Min. Tracking Elev. [deg]: 20
Laser Polarization @emitter: see laser system
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 :
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 : 1991-06-07 HH:MM UT
Date Last Applicable :
Additional Information :
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8. Calibration
8.01 Calibration Type : REALTIME
Target Location : INTERNAL
Target Type : N.A.
Target Structure : N.A.
Number of Targets :
Target Distance(s) [m]:
Date Measured :
Accuracy [mm]:
Verification : by external target
Return-Rate Controlled : YES
Eye-Safe Method : ND FILTERS
Additional Information :
Mode of Operation : SINGLE PHOTON
Calibration performed : parallel to each satellite observation
Single Shot RMS [mm]: N.A.
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : ITERATIVE 2.5 SIGMA
Application of Cal Data : LINEAR FIT
Date Installed : 1989-03-01
Date Removed : 2019-06-06
Additional Information : Calibration to an external target is
: necessary to determine the additional
: constant from the calibration point to the
: intersect of azimuth and elevation. This
: calibration is done twice a year or when
: required.
8.02 Calibration Type : PRE+POST
Target Location : INTERNAL+EXTERNAL
Target Type : N.A., CORNER CUBE, CORNER CUBE
Target Structure : N.A., METAL POLE, METAL POLE
Number of Targets : 3
Target Distance(s) [m]: N.A., 10.303, 2,425
Date Measured : N.A.
Accuracy [mm]: 1
Verification : yearly local tie survey
Return-Rate Controlled : YES
Eye-Safe Method : ND FILTERS
Additional Information :
Mode of Operation : SINGLE PHOTON
Calibration performed : HALF-HOUR
Single Shot RMS [mm]: 4
Edit Criterion 1st Chain : ITERATIVE 2.0 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : LINEAR FIT
Date Installed : 2019-06-07
Date Removed :
Additional Information : Internal calibration is used for
: SLR PRE&POST calibration. 2 external
: calibration targets are used to determine
: & verify system delay. One of the targets
: is GOW station fiducial.
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : H-MASER
Model : EFOS
Manufacturer : Observatoire Cantonal de Neuchatel
Short Term Stab. [e-12]: 0.15
Long Term Stab. [e-12]: 0.002
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 100
Date Installed : 1989-03-01
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : TTR 6
Manufacturer : Allen Osborne
Date Installed : 1995-10-01
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 : IRV+POLYNOMIAL
Return-Rate Rejection :
Edit Criterion 1st Chain : 2.5 SIGMA
Edit Criterion 2nd Chain : 2.5 SIGMA
Upload interval : AFTER EACH PASS
Date First Applicable : 1991-06-07 HH:MM UT
Date Last Applicable : 2019-06-06 24:00 UT
Additional Information :
10.02 On-site NP Generation : YES
Data Screening : SHORT ARC FIT
Return-Rate Rejection : MAX 10 %
Edit Criterion 1st Chain : 2.2 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : AFTER EACH PASS SEGMENT
Date First Applicable : 2019-06-07 00:00 UT
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : ADSB,DFS Position Data,IR-Camera
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]: 4
Date Installed : 2017-MM-DD
Date Removed :
Additional Information :
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : Digiquartz 740-16B
Manufacturer : Paroscientific
Recording Interval : EVERY 1 MINUTE
Accuracy [mbar]: 0.1
Height Diff to SRP [m]: 9,354
Distance from SRP [m]: 40
Date Installed : 1990-01-01 HH:MM UT
Calibration Interval : 2019-02-26, YEARLY
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : 809
Manufacturer : Lambrecht
Recording Interval : EVERY 1 MINUTE
Accuracy [deg C]: 0.3
Date Installed : 1990-01-01 HH:MM UT
Calibration Interval : MONTHLY
Date Removed : 2022-01-25 HH:MM UT
Additional Information :
12.02.02 Temp Sensor Model : EE33-PFTM2022N
Manufacturer : E+E_Elektronik
Recording Interval : EVERY 3 MINUTES
Accuracy [deg C]: 0.25
Date Installed : 2022-01-25 HH:MM UT
Calibration Interval : YEARLY
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : 809
Manufacturer : Lambrecht
Recording Interval : EVERY 1 MINUTE
Accuracy [% rel h]: 2.5
Date Installed : 1990-01-01 HH:MM UT
Calibration Interval : MONTHLY
Date Removed : 2022-01-25 HH:MM UT
Additional Information : A watervapour radiometer
: is also available.
12.03.02 Humidity Sensor Model : EE33-PFTM2022N
Manufacturer : E+E_Elektronik
Recording Interval : EVERY 3 MINUTES
Accuracy [% rel h]: 2.3
Date Installed : 2022-01-25 HH:MM UT
Calibration Interval : 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+EUREF
Date Installed : 1995-02-09
Date Removed :
Additional Info : another IGS site installed 1997-02-06
13.01.01.02 GNSS : IGLOS
Date Installed : 1999-02-01
Date Removed :
Additional Info :
13.01.02.01 DORIS : NO
Date Installed :
Date Removed :
Additional Info :
13.01.03.01 PRARE : YES
Date Installed : 1997-01-20
Date Removed : 1997-02-03
Additional Info : Other PRARE installations;
: 1996-03-26 to 1996-05-21
: 1996-12-11 to 1996-12-23
: 1997-01-02 to 1997-01-12
13.01.04.01 VLBI : YES
Date Installed : 1983-01-01
Date Removed :
Additional Info :
13.01.05.01 Gravimeter : SUPERCONDUCTING
Date Installed : 1998-11-01
Date Removed :
Additional Info :
13.01.06.01 Other SLR : 7827
Date Installed : 2014-05-01
Date Removed :
Additional Info :
13.02.01.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : WTZR
Instrumentation Type : GPS
Instrumentation Status : PERMANENT
DOMES Number : 14201M010
CDP Number :
Differential Components (ITRS)
dx [m]: 3.828 +- 0.001
dy [m]: 68.200 +- 0.001
dz [m]: -15.517 +- 0.001
Date Measured : 1995-02-13
Determined by :
Date Installed : 1995-02-09
Date Removed :
Additional Information : All systems are tied to a local
: network cinsisting of more then
: 20 survey points. The accuracy
: of the differential components
: are better then 1 mm. Footpoint
: measurements were made and will
: be made regulary.
13.02.02.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : WTZT
Instrumentation Type : GPS
Instrumentation Status : PERMANENT
DOMES Number : 14201M011
CDP Number :
Differential Components (ITRS)
dx [m]: 0.757 +- 0.001
dy [m]: 69.820 +- 0.001
dz [m]: -13.360 +- 0.001
Date Measured : 1995-02-13
Determined by :
Date Installed : 1997-02-06
Date Removed :
Additional Information :
13.02.03.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : VLBI, Wettzell
Instrumentation Type : VLBI
Instrumentation Status : PERMANENT
DOMES Number : 14201S004
CDP Number : 7224
Differential Components (ITRS)
dx [m]: -36.976 +- 0.001
dy [m]: -50.198 +- 0.001
dz [m]: 45.799 +- 0.001
Date Measured : 1996-01-04
Determined by :
Date Installed : 1983-01-01
Date Removed :
Additional Information :
13.02.04.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : WTZZ
Instrumentation Type : GLONASS
Instrumentation Status : PERMANENT
DOMES Number : 14201M014
CDP Number :
Differential Components (ITRS)
dx [m]:
dy [m]:
dz [m]:
Date Measured :
Determined by :
Date Installed : 1997-02-06
Date Removed :
Additional Information :
13.02.05.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name :
Instrumentation Type : PRARE
Instrumentation Status : MOBILE
DOMES Number :
CDP Number :
Differential Components (ITRS)
dx [m]: -45.786 +- 0.001
dy [m]: -45.910 +- 0.001
dz [m]: 45.350 +- 0.001
Date Measured : 1994-03-22
Determined by :
Date Installed : 1996-03-26
Date Removed : 1997-02-03
Additional Information :
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 :
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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 : BKG und FESG
: Geodaetisches Observatorium Wettzell
: Sackenrieder Str. 25
: D-93444 Bad Koetzting
: Germany
Mailing Address : VL_SLR_Wettzell@bkg.bund.de
Website :
Primary Contact
Contact Name : Johann Eckl
Telephone (primary) : 09941/603119
Telephone (secondary) :
Fax :
E-mail : johann.eckl@bkg.bund.de
Secondary Contact
Contact Name : Johann-Theodor Bachem
Telephone (primary) : 09941/603111
Telephone (secondary) :
Fax :
E-mail : johann-theodor.bachem@bkg.bund.de
Tertiary Contact
Contact Name : Schreiber Ulrich
Telephone (primary) : 09941/603113
Telephone (secondary) :
Fax :
E-mail : ulrich.schreiber@tum.de
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 : www.bkg.bund.de
Hardcopy on File
Site Map : YES
Site Diagram : NO
Horizon Mask : NO
Monument Description : NO
Site Pictures : YES
Additional Information :
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