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ILRS Home  Stations Site Listing Riga
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Riga: Site Log
Instructions and Update Site Log
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Section: 0. FormSection: 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) : Kazimirs Lapushka
Preparer E-mail : riglas@lanet.lv
Date Prepared : 2002-05-09
Report Type : UPDATE
Format Version : 1.0
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1. Identification of the Ranging System Reference Point (SRP)
Site Name : RIGA
IERS DOMES Number : 12302S002
CDP Pad ID : 1884
Subnetwork : EUROLAS
Description : AZ EL INTERSECT
Monument Description : N.A.
Monument Inscription : N.A.
Mark Description : N.A.
Date Installed : 1987-09-01
Date Removed : (yyyy-mm-dd)
Geologic Characteristic : SAND
Additional Information : (multiple lines)
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2. Site Location Information
City or Town : Riga
State or Province : Vidzeme
Country : Latvia
Tectonic Plate : Eurasian
Approximate Position
X coordinate [m]: 3183895.956
Y coordinate [m]: 1421497.045
Z coordinate [m]: 5322803.761
Latitude [deg]: 56.9486 N
Longitude [deg]: 24.0591 E
Elevation [m]: 31.332745
Additional Information : ITRF 96 1997.0
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3. General System Information
3.01 System Name : Riga
4-Character Code : RIGL
CDP System Number : 44
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]: (m +- m)
East [m]: (m +- m)
Up [m]: (m +- m)
Date Measured : (yyyy-mm-dd)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Mount : AZ-EL
Xmitting Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Tracking Camera Type : Image Amplifier + CCD/TV
Model : EP-16, SK-2005
Manufacturer : SUN-KWANG
Field of View [deg]: 0.3
Minimum Magnitude [mag]: 11.0
Transmit/Receive Path : COMMON
Transmit/Receive Switch : ROTATING MIRROR
Max Slew Rate Az [deg/s]: 2.0
Max Slew Rate El [deg/s]: 2.0
Max Used Tracking Rate Az : 2.0
Max Used Tracking Rate El : 2.0
Telescope Shelter : ROLL-BACK ROOF
Daylight Filter Type : Holographyc reflective notch filter
Dayl. Filt. Bandwidth [nm]: 0.4
Adjustable Attenuation : RECEIVE
Transmit Efficiency : ~0.60
Receive Efficiency : ~0.30
Date Installed : 1987-09-01
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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5. Laser System Information
5.01 Laser Type : ND:YAG
Number of Amplifiers : 1
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 280
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 120
Xmit Energy Adjustable : NO
Pulse Width (FWHM) [ps]: 130
Max. Repetition Rate [Hz]: 10
Fullw. Beam Divergence ["]: 4-40
Final Beam Diameter [m]: 0.8
Eyesafe : NO
Eyesafe Standard : NONE
Date Installed : 1995-04-14
Date Removed : (yyyy-mm-dd)
Additional Information : three-pass amplifier
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532.0
Detector Type : PMT
Manufacturer : Russia
Model : FEU-164
Quantum Efficiency [%]: 12
Nominal Gain :
Rise Time [ps]: 2000
Jitter (Single PE)[ps]: 80
Field of View ["]: 180
Date Installed : 1999-09-20
Date Removed : (yyyy-mm-dd)
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 2000-07-10
Date Removed : (yyyy-mm-dd)
Amplitude Measurement : YES
Return-rate Controlled: NO
Mode of Operation : Single to Multi Photons
Time of Flight Observ. : INTERVAL
Manufacturer : Latvian University
Model : SETIC-9801
Resolution [ps]: 10
Precision [ps]: 15
Date Installed : 1999-02-08
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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7. Tracking Capabilities
7.01 Satellites
Very Low Alt (<400 km) : NIGHT
Low Altitude (400-2000) : NIGHT
Lageos : NIGHT
GLONASS : NIGHT
Etalon : NIGHT
GPS : NIGHT
Moon : NO
Avge Pass Switch Time [s]: 180
Average values for Lageos
Single Shot RMS [mm]: 15
# of Obs per NP : 30
Use of Semi-trains : NO
# of Semi-train Tracks : N.A.
Range Gate Width [ns]: 200-256000
Beam Pointing Accuracy ["]: 1
Angle Encoder Resolution["]: none
Min. Tracking Elev. [deg]: 15
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 5-17
Staff per Shift : 3
System Shared With : none
Time Allocated to SLR [%]: 100
Remotely Controllable : NO
Date First Applicable : (yyyy-mm-dd)
Date Last Applicable : (yyyy-mm-dd)
Additional Information : (multiple lines)
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : INTERNAL
Target Type : Fiber-optics cable, flat surface, CCR
Target Structure : METAL POLE
Target Distance [m]: 154.7120, 41.730, 16.399
Date Measured : (yyyy-mm-dd)
Accuracy (mm) [mm]: 10
Verification : internal calibration checked with external calibration
Return-rate Controlled : NO
Mode of Operation : Single to Multi Photons
Average Cal Interval [min]: 1
Single Shot RMS [mm]: 10
Edit Criterion 1st Chain : ITERATIVE 2.0 SIGMA
Edit Criterion 2nd Chain : (ITERATIVE n.n SIGMA/MANUAL/NONE/N.A./etc)
Application of Cal Data : (AVERAGE/LINEAR FIT/etc)
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Rubidium
Model : CH1-74
Manufacturer : Russia
Short Term Stab. [e-12]: unknown
Long Term Stab. [e-12]: unknown
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 200
Date Installed : 1980-01-15
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
9.02.01 GPS Timing Rcvr Model : SNR-8000
Manufacturer : ROGUE
Date Installed : 1995-12-05
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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10. Preprocessing Information
10.01 On-site NP Generation : YES
Data Screening : POLYNOMIAL
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : AFTER EACH SHIFT
Date First Applicable : (yyyy-mm-dd hh:mm UT)
Date Last Applicable : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
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11. Aircraft Detection
11.01 Detection Type : NONE
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : Barometer-Paulin VBM2
Manufacturer : Ericcson
Recording Interval : PER PASS
Accuracy [mbar]: 0.2
Height Diff to SRP [m]: 0.5
Date Installed : (yyyy-mm-dd hh:mm UT)
Calibration Interval : (YEARLY/MONTHLY/etc)
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
12.02.01 Temp Sensor Model : Mercury Thermometer
Manufacturer : unknown
Recording Interval : PER PASS
Accuracy [deg C]: 0.2
Date Installed : (yyyy-mm-dd hh:mm UT)
Calibration Interval : (YEARLY/MONTHLY/etc)
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
12.03.01 Humidity Sensor Model : hair hygrometer, psychrometer
Manufacturer : unknown
Recording Interval : PER PASS
Accuracy [% rel h]: 15
Date Installed : (yyyy-mm-dd hh:mm UT)
Calibration Interval : (YEARLY/MONTHLY/etc)
Date Removed : (yyyy-mm-dd hh:mm UT)
Additional Information : (multiple lines)
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13. Local Ties, Eccentricities, and Collocation Information
13.01 Collocated Permanent Geodetic Systems
GPS : EUREF
Date Installed : 1995-12-05
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
GLONASS : NO
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
DORIS : NO
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
PRARE : NO
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
VLBI : NO
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
Gravimeter : ABSOLUTE FG5.Sessions.
Date Installed : 1995.FGI, 1996.IFAG, 1996.DMA(USA)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
13.02.01 Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : Permanent GPS antenna
Instrumentation Type : GPS
Instrumentation Status : PERMANENT
DOMES Number : 12302M002
CDP Number : (XXXX)
Differential Components (ITRS)
dx [m]: 3.401 +- 0.0005
dy [m]: -18.661 +- 0.0004
dz [m]: 6.963 +- 0.0007
Date Measured : 1994-01-01
Determined by : local GPS session
Date Installed : (yyyy-mm-dd)
Date Removed : (yyyy-mm-dd)
Additional Information : (multiple lines)
13.03.01 Eccentricities Between Other Monuments on Site
From: Monument Name : Mobile laser platform
DOMES Number : 12302M001
CDP Number : 7560
To: Monument Name : GPS antenna
DOMES Number : 12302M002
CDP Number : (XXXX)
Differential Components (ITRS)
dx [m]: -14.837 +- 0.0004
dy [m]: 4.831 +- 0.0003
dz [m]: 13.913 +- 0.0007
Date Measured : 1994-01-01
Determined by : local GPS Session
Additional Information : (multiple lines)
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14. Local Events Possibly Affecting Computed Position
14.01 Date : (yyyy-mm-dd hh:mm UT)
Event : (EARTHQUAKE/CONSTRUCTION/etc)
Additional Information : (multiple lines)
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15. On-Site, Point of Contact Agency Information
Agency : Astronomical Institute of University of
Latvia
Mailing Address : Blw.Rainis 19, Riga, LV-1586, Latvia
Primary Contact
Contact Name : Dr. Kazimirs Lapushka
Telephone (primary) : 371 7 611984
Telephone (secondary) : 371 7 034580
Fax : 371 7 820180
E-mail : riglas@lanet.lv
Secondary Contact
Contact Name : MSC Valdis Laposhka
Telephone (primary) : 371 7 611984
Telephone (secondary) : 371 7 034580
Fax : 371 7 820180
E-mail : riglas@lanet.lv
Additional Information : (multiple lines)
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16. Responsible Agency (if different from 15.)
Agency : (multiple lines)
Mailing Address : (multiple lines)
Primary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information : (multiple lines)
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17. More Information
URL for More Information : N.A.
Hardcopy on File
Site Map : NO
Site Diagram : NO
Horizon Mask : NO
Monument Description : NO
Site Pictures : NO
Additional Information : (multiple lines)
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