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Riga
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Riga Contact:
| Agency | Institute of Astronomy University of Latvia |
| Mailing Address | Institute of Astronomy University of Latvia Jelgavas 3, Riga, Latvia LV-1004 |
| Primary Contact | |
| Contact Name | Kalvis Salmins |
| Telephone (primary) | 371 26594290 |
| Telephone (secondary) | |
| Fax | |
| kalvis.salmins@lu.lv | |
| Secondary Contact | |
| Contact Name | |
| Telephone (primary) | |
| Telephone (secondary) | |
| Fax | |
Riga Coordinates:
Approximate Position:
| X coordinate | [m] | 3183895.6062 |
| Y coordinate | [m] | 1421497.3037 |
| Z coordinate | [m] | 5322803.9237 |
| Latitude | [deg] | 56.948553 N |
| Longitude | [deg] | 24.059080 E |
| Elevation | [m] | 31.35 |
| Survey Method | ||
| Date Measured | ||
| Additional Information | ITRF 2020 2000.0 | |
Riga News:
Local Events:
No local events found.
SLRMail Messages:
No SLRMail mesages found.Riga Link:
No site link found.Riga: 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) : Kalvis Salmins
Preparer E-mail : kalvis.salmins@lu.lv
Date Prepared : 2025-02-19
Report Type : UPDATE
Site Log Format Version : 2.0
Site Log Revision : A
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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 : Concrete monolith.
Monument Inscription : None
Mark Description : brass rod survey marker
Date Installed : 1987-09-01
Date Removed :
Geologic Characteristic : SAND
Additional Information :
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2. Site Location Information
City or Town : Riga
State or Province : Vidzeme
Country : Latvia
Tectonic Plate : Eurasian
Local Time (UTC +/- hours) : 2
Approximate Position
X coordinate [m]: 3183895.6062
Y coordinate [m]: 1421497.3037
Z coordinate [m]: 5322803.9237
Latitude [deg]: 56.948553 N
Longitude [deg]: 24.059080 E
Elevation [m]: 31.35
Survey Method : GNSS CAMPAIGN, tachymetry
Date Measured : 2021-01-26
Additional Information : ITRF 2020 2000.0
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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]:
East [m]:
Up [m]:
Date Measured : 1987-09-01
Date Installed : 1987-09-01
Date Removed :
Additional Information :
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4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN-COUDE
Aperture [m]: 1.0
Mount : ALT-AZ
Date Installed :
Date Removed :
Xmitting Telescope Type : CASSEGRAIN-COUDE
Aperture [m]: 1.0
Date Installed :
Date Removed :
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
Date Installed : 2021-01-01
Date Removed :
Transmit/Receive Path : COMMON COUDE
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 : Holographic reflective notch filter
Dayl. Filt. Bandwidth [nm]: 0.4
Adjustable Attenuation : RECEIVE
Adjustable Field of View :
Transmit Efficiency : 0.6
Receive Efficiency : 0.3
Date Installed : 1987-09-01
Date Removed : 2008-01-01
Additional Information :
4.02 Receiving Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Mount : AZ-EL
Date Installed :
Date Removed :
Xmitting Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Date Installed :
Date Removed :
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
Date Installed :
Date Removed :
Transmit/Receive Path : COMMON COUDE
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 : ANDOVER interference filter
Dayl. Filt. Bandwidth [nm]: 0.93
Adjustable Attenuation : RECEIVE
Adjustable Field of View :
Transmit Efficiency : 0.60
Receive Efficiency : 0.30
Date Installed : 2008-01-01
Date Removed : 2019-02-14
Additional Information :
4.03 Receiving Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Mount : AZ-EL
Date Installed :
Date Removed :
Xmitting Telescope Type : CASSEGRAIN COUDE
Aperture [m]: 1.0
Date Installed :
Date Removed :
Tracking Camera Type : EMCCD
Model : IXon ULTRA 888
Manufacturer : Oxford
Field of View [deg]: 0.18
Minimum Magnitude [mag]: 13.0
Date Installed : 2019-02-14
Date Removed :
Transmit/Receive Path : COMMON COUDE
Transmit/Receive Switch : ROTATING MIRROR
Max Slew Rate Az [deg/s]: 2.4
Max Slew Rate El [deg/s]: 2.4
Max Used Tracking Rate Az : 2.4
Max Used Tracking Rate El : 2.4
Telescope Shelter : ROLL-BACK ROOF
Daylight Filter Type : Spectral Filter
Dayl. Filt. Bandwidth [nm]: 0.15
Adjustable Attenuation : RECEIVE
Adjustable Field of View : YES: FOV 30-120
Transmit Efficiency : 0.3
Receive Efficiency : 0.3
Date Installed : 2019-02-14
Date Removed :
Additional Information :
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model :
Manufacturer : Ekspla
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
Additional Information :
Pulse Width (FWHM) [ps]: 130
Max. Repetition Rate [Hz]: 10
Fullw. Beam Divergence ["]: 4 - 40
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.8
Eyesafe : NO
Eyesafe Standard : None
Polarization on Exit : Linear
Laser Fire Control : Controlled
Laser Energy Monitor : Continuos
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 : 1995-04-14
Date Removed : 2004-12-15
Additional Information :
5.02 Laser Type : ND:YAG
Model :
Manufacturer :
Number of Amplifiers : 1
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 250
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 120
Xmit Energy Adjustable : YES
Additional Information :
Pulse Width (FWHM) [ps]: 150
Max. Repetition Rate [Hz]: 10
Fullw. Beam Divergence ["]: 20 - 40
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.85
Eyesafe : NO
Eyesafe Standard : NONE
Polarization on Exit : LINEAR
Laser Fire Control : CONTROLLED, SYNCRONISED TO UTC
Laser Energy Monitor : CONTINUOUS
Start Diode Type : APD
Manufactorer : Hamamamtsu
Model : C5658
Quantum Efficiency [%]: 16
Rise/Fall Time [ps]: 500
Date Installed :
Date Removed :
Signal Processing : CFD
Manufacturer : Tennelec
Model : 454
Date Installed : 2004-12-15
Date Removed :
Additional Information :
Date Installed : 2004-12-15
Date Removed :
Additional Information :
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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]: 1000
Field of View Diam ["]: 180
Date Installed : 1999-09-20
Date Removed : 2001-04-30
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : CFD
Manufacturer : TENNELEC
Model : TC-454
Date Installed : 2000-07-10
Date Removed : 2001-04-30
Amplitude Measurement : YES
Return-Rate Controlled: NO
Mode of Operation : MULTI-SINGLE
Additional Information:
Time of Flight Observ. : Selective Ewent Timer
Manufacturer : custom made
Model : SETIC-9801
Resolution [ps]: 10
Precision [ps]: 15
Date Installed : 1999-02-08
Date Removed : 2006-06-06
Additional Information :
6.01.02 Primary Chain
Wavelength [nm]: 532.0
Detector Type : PMT module
Manufacturer : Hamamatsu
Model : H6780-20
Quantum Efficiency [%]: 31
Nominal Gain : 1e7
Rise Time [ps]: 780
Jitter (Single PE)[ps]: 240
Field of View Diam ["]: 180
Date Installed : 2001-04-30
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 2000-07-10
Date Removed :
Amplitude Measurement : YES
Return-Rate Controlled: NO
Mode of Operation : Single to Multi Photons
Additional Information:
Time of Flight Observ. : Event timer
Manufacturer : EDI Latvia
Model : RTS-2006
Resolution [ps]: 6
Precision [ps]: 10
Date Installed : 2006-06-06
Date Removed : 2016-04-28
Additional Information : RTS-2006 is based on Riga ET-A032
6.01.03 Primary Chain
Wavelength [nm]: 532.0
Detector Type : PMT module
Manufacturer : Hamamatsu
Model : H11901-20
Quantum Efficiency [%]: 18
Nominal Gain : 1e7
Rise Time [ps]: 570
Jitter (Single PE)[ps]: N.A.
Field of View Diam ["]: 30 - 120
Date Installed : 2016-04-28
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : CFD
Manufacturer : Tennelec
Model : TC454
Date Installed : 2000-07-10
Date Removed : 2019-04-12
Amplitude Measurement : YES
Return-Rate Controlled: NO
Mode of Operation : Single to Multi Photons
Additional Information:
Time of Flight Observ. : Event timer
Manufacturer : EDI Latvia
Model : RTS-2006
Resolution [ps]: 6
Precision [ps]: 10
Date Installed : 2006-06-06
Date Removed :
Additional Information : RTS-2006 is based on Riga ET-A032
6.01.04 Primary Chain
Wavelength [nm]: 532
Detector Type : PMT
Manufacturer : Hamamatsu
Model : H11901-20
Quantum Efficiency [%]: 15
Nominal Gain :
Rise Time [ps]: 700
Jitter (Single PE)[ps]:
Field of View Diam ["]: 30 - 120
Date Installed : 2019-04-12
Date Removed :
Amplifier Type :
Manufacturer : Hamamatsu
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : Leading edge
Manufacturer : EDI
Model : TS/ATIC
Date Installed : 2019-04-12
Date Removed :
Amplitude Measurement : YES
Return-Rate Controlled: NO
Mode of Operation : Multi
Additional Information: PMT time-walk compensation is done during
: post processing
Time of Flight Observ. : EVENT
Manufacturer : EDI
Model : RTS 2006
Resolution [ps]: 8
Precision [ps]: 8
Date Installed :
Date Removed :
Additional Information :
6.02.01 Secondary Chain
Wavelength [nm]: 532
Detector Type : HPD
Manufacturer : PicoQuant
Model : PMA-40
Quantum Efficiency [%]: 44
Nominal Gain :
Rise Time [ps]: 400
Jitter (Single PE)[ps]:
Field of View Diam ["]: 20 - 120
Date Installed :
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : LEADING EDGE
Manufacturer : EDI
Model : TS/ATIC
Date Installed : 2019-04-12
Date Removed :
Amplitude Measurement : YES
Return-Rate Controlled: NO
Mode of Operation : MULTI, FEW PHOTON, SINGLE
Additional Information: Amplifier is builtin in the detector package
Time of Flight Observ. : EVENT
Manufacturer : EDI
Model : RTS-2006
Resolution [ps]: 8
Precision [ps]: 8
Date Installed : 2023-08-01
Date Removed :
Additional Information : Experimental setup
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) : NIGHT
Low Altitude (400-2000) : NIGHT
LAGEOS/LARES : NIGHT
GLONASS : NIGHT
Etalon : NIGHT
GNSS : NIGHT
Geosynchronous : NO
Moon : NO
Ave. Pass Switch Time [s]: 300
Average values for LAGEOS
Single Shot RMS [mm]: 13
# of Obs per NP : 20 - 300
Use of Semi-trains : NO
# of Semi-train Tracks : NO
Range Gate Width [ns]: 20 - 256000
Beam Pointing Accuracy ["]: 5
Angle Encoder Resolution["]: N.A.
Min. Tracking Elev. [deg]: 15
Laser Polarization @emitter:
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 5 - 17
Staff per Shift : 2 - 3
System Shared With : none
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 : 1987-09-05 HH:MM UT
Date Last Applicable : 2016-07-27 HH:MM UT
Additional Information :
7.02 Satellites
Very Low Alt (<400 km) : NIGHT
Low Altitude (400-2000) : NIGHT
LAGEOS/LARES : NIGHT
GLONASS : NIGHT
Etalon : NIGHT
GNSS : NIGHT
Geosynchronous : NO
Moon : NO
Ave. Pass Switch Time [s]: 300
Average values for LAGEOS
Single Shot RMS [mm]: 12
# of Obs per NP : 20 - 300
Use of Semi-trains : NO
# of Semi-train Tracks : NO
Range Gate Width [ns]: 20 - 256000
Beam Pointing Accuracy ["]: 15
Angle Encoder Resolution["]: none
Min. Tracking Elev. [deg]: 15
Laser Polarization @emitter: LINEAR
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 5 - 17
Staff per Shift : 2
System Shared With : R&D, Space debris, Photometry
Time Allocated to SLR [%]: 70
Remotely Controllable : NO
Tracking Restrictions
Go/No-go flag : NO
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 : 2016-07-27 HH:MM UT
Date Last Applicable :
Additional Information : Daylight tracking currently limited to
: period before and after twilight
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : INTERNAL+EXTERNAL
Target Type : Fiber-optics cable, flat surface,CCR
Target Structure : METAL POLE
Number of Targets :
Target Distance(s) [m]: 154.7120,41.730,16.399
Date Measured : 1998-10-15
Accuracy [mm]: 10
Verification : (multiple lines)
Return-Rate Controlled : NO
Eye-Safe Method :
Additional Information :
Mode of Operation : SINGLE/MULTI PHOTON
Calibration performed : 1
Single Shot RMS [mm]: 10
Edit Criterion 1st Chain : ITERATIVE 2.0 SIGMA
Edit Criterion 2nd Chain :
Application of Cal Data : LINEAR FIT
Date Installed : 1998-10-10
Date Removed : 2006-07-10
Additional Information :
8.02 Calibration Type : PRE+POST
Target Location : INTERNAL+EXTERNAL
Target Type : Fiber-optics cable, flat surface, CCR
Target Structure : METAL POLE
Number of Targets :
Target Distance(s) [m]: 153.41, 41.730,
Date Measured :
Accuracy [mm]: 10
Verification : internal calibration checked with external
Return-Rate Controlled : YES
Eye-Safe Method :
Additional Information :
Mode of Operation : SINGLE/MULTI PHOTON
Calibration performed : each pass
Single Shot RMS [mm]: 6 - 7
Edit Criterion 1st Chain : ITERATIVE 2.0 SIGMA
Edit Criterion 2nd Chain : ITERATIVE 1.0 SIGMA
Application of Cal Data : LINEAR FIT
Date Installed : 2006-07-10
Date Removed : 2016-05-03
Additional Information :
8.03 Calibration Type : PRE+POST
Target Location : INTERNAL+EXTERNAL
Target Type : Fiber-optics cable, CCR
Target Structure : CCR at front of telescope, CONCRETE PIER
Number of Targets : 2
Target Distance(s) [m]: 25.003, 1.289
Date Measured : 2016-MM-DD
Accuracy [mm]: 2
Verification : internal calibration checked with external
Return-Rate Controlled : YES
Eye-Safe Method : ND FILTERS
Additional Information :
Mode of Operation : SINGLE/MULTI PHOTON
Calibration performed : 120
Single Shot RMS [mm]: 8
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : ITERATIVE 1.0 SIGMA
Application of Cal Data : LINEAR INTERPOLATION
Date Installed : 2016-05-03
Date Removed :
Additional Information :
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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]:
Long Term Stab. [e-12]:
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 200
Date Installed : 1980-01-15
Date Removed : 2014-02-25
Additional Information :
9.01.02 Frequency Standard Type : Rubidium disciplined by GPS
Model : SecureSync 1200-033
Manufacturer : Spectracom
Short Term Stab. [e-12]: 2
Long Term Stab. [e-12]: 50
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 30
Date Installed : 2014-02-25
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : SNR-8000
Manufacturer : ROGUE
Date Installed : 1995-12-05
Date Removed : 2001-06-01
Additional Information :
9.02.02 GNSS Timing Rcvr Model : 58540A
Manufacturer : SIMMETRICOM
Date Installed : 2001-06-01
Date Removed : 2014-02-25
Additional Information :
9.02.03 GNSS Timing Rcvr Model : SecureSync 1200-033
Manufacturer : Spectracom
Date Installed : 2014-02-25
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 : Orbital & POLYNOMIAL
Return-Rate Rejection :
Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : AFTER EACH SHIFT
Date First Applicable :
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : visual
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed :
Date Removed :
Additional Information :
11.02 Detection Type : ADS-B receiver + visual
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed : 2014-03-11
Date Removed :
Additional Information :
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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
Distance from SRP [m]:
Date Installed : 1987-09-01 HH:MM UT
Calibration Interval : YEARLY
Date Removed : 2007-03-30 HH:MM UT
Additional Information :
12.01.02 Pressure Sensor Model : BAROCAP
Manufacturer : VAISALA
Recording Interval : 10 min
Accuracy [mbar]: 0.5
Height Diff to SRP [m]: +2
Distance from SRP [m]:
Date Installed : 2007-03-30 HH:MM UT
Calibration Interval : YEARLY
Date Removed : 2025-01-13 13:00 UT
Additional Information : BAROCAP belongs to WXT510 Vaisala
: Weather transmitter
12.01.03 Pressure Sensor Model : WXT-536
Manufacturer : Vaisala
Recording Interval : 10min
Accuracy [mbar]: 0.1
Height Diff to SRP [m]: -0.136
Distance from SRP [m]: 16
Date Installed : 2024-10-14 13:00 UT
Calibration Interval : NA
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : Mercury Thermometer
Manufacturer : unknown
Recording Interval : PER PASS
Accuracy [deg C]: 0.2
Date Installed : 1987-09-01 HH:MM UT
Calibration Interval : YEARLY to Riga Meteo
Date Removed : 2007-03-30 HH:MM UT
Additional Information :
12.02.02 Temp Sensor Model : TERMOCAP
Manufacturer : VAISALA
Recording Interval : 10 min
Accuracy [deg C]: 0.3
Date Installed : 2007-03-30 HH:MM UT
Calibration Interval : YEARLY
Date Removed : 2025-01-13 13:00 UT
Additional Information : TERMOCAP belongs to WXT510 Vaisala
: Weather transmitter
12.02.03 Temp Sensor Model : WXT-536
Manufacturer : Vaisala
Recording Interval : 10min
Accuracy [deg C]: 0.3
Date Installed : 2024-10-14 13:00 UT
Calibration Interval : na
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : hair hygrometer,psychrometer
Manufacturer : unknown
Recording Interval : PER PASS
Accuracy [% rel h]: 15
Date Installed : 1987-09-01 HH:MM UT
Calibration Interval : MONTHLY to Riga meteo
Date Removed : 2007-03-30 HH:MM UT
Additional Information :
12.03.02 Humidity Sensor Model : HUMICAP180
Manufacturer : VAISALA
Recording Interval : 10 min
Accuracy [% rel h]: 3
Date Installed : 2007-03-30 HH:MM UT
Calibration Interval : YEARLY
Date Removed : 2025-01-13 13:00 UT
Additional Information : HUMICAP180 belongs to WXT510 Vaisala
: Weather transmitter
12.03.03 Humidity Sensor Model : WXT-536
Manufacturer : Vaisala
Recording Interval : 10 min
Accuracy [% rel h]: 3
Date Installed : 2024-10-14 13:00 UT
Calibration Interval : na
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 : EUREF, IGS
Date Installed : 1995-12-05
Date Removed :
Additional Info : (multiple lines)
13.01.01.02 GNSS : EUREF, IGS
Date Installed : 2013-12-11
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 : Permanent GPS antenna
Instrumentation Type : GPS
Instrumentation Status : PERMANENT
DOMES Number : 12302M002
CDP Number :
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 :
Date Removed :
Additional Information :
13.02.[0-9][0-9].[0-9][0-9] Local Ties from the SRP to Other Monuments or Systems on Site
13.02.[0-9][0-9].[0-9][0-9] Local Ties from the SRP to Other Monuments or Systems on Site
13.02.[0-9][0-9].[0-9][0-9] Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name :
Monument Name :
Monument Name : GNSS antenna
Instrumentation Type : GNSS
Instrumentation Type :
Instrumentation Type : GPS+GLONASS+GALILEO+BEIDOU
Instrumentation Status : PERMANENT
Instrumentation Status :
Instrumentation Status : PERMANENT
DOMES Number : 12302M002
DOMES Number :
DOMES Number : 12302M002
CDP Number :
CDP Number :
CDP Number :
Differential Components (ITRS)
Differential Components (ITRS)
Differential Components (ITRS)
dx [m]:
dx [m]: 3.411 +- 0.0014
dx [m]: 3.411 +- 0.0014
dy [m]:
dy [m]: -18.673 +- 0.0014
dy [m]: -18.673 +- 0.0014
dz [m]: 6.951 +- 0.0026
dz [m]:
dz [m]: 6.951 +- 0,0026
Date Measured : 2021-01-14
Date Measured :
Date Measured : 2021-01-26
Determined by :
Determined by :
Determined by : Latvian Geospatial Information Agency
Date Installed :
Date Installed :
Date Installed :
Date Removed :
Date Removed :
Date Removed :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
Additional Information :
13.02.[0-9][0-9].[0-9][0-9] Local Ties from the SRP to Other Monuments or Systems on Site
Monument Name : M1884
Instrumentation Type : NONE
Instrumentation Status : MOBILE
DOMES Number : 12302M001
CDP Number : 7560
Differential Components (ITRS)
dx [m]: 18.2429 +- 0.0006
dy [m]: -23.4994 +- 0.0021
dz [m]: -6.9677 +- 0.0016
Date Measured : 2021-01-26
Determined by : Latvian Geospatial Information Agency
Date Installed :
Date Removed :
Additional Information :
13.03.01.01 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 :
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 :
13.03.[0-9][0-9].[0-9][0-9] Eccentricities Between Other Monuments on Site
From: Monument Name : M1884, Mobile laser platform
DOMES Number : 12302M001
CDP Number : 7560
To: Monument Name : GNNS antenna
DOMES Number : 12302M002
CDP Number :
Differential Components (ITRS)
dx [m]: -14.8331 +- 0.0013
dy [m]: 4.8273 +- 0.009
dz [m]: 13.9197 +- 0.0021
Date Measured : 2021-01-26
Determined by : Latvian Geospatial Information Agency
Additional Information :
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14. Local Events Possibly Affecting Computed Position
14.01 Date :
Event :
Additional Information :
Back to top
15. On-Site, Point of Contact Agency Information
Agency : Institute of Astronomy
: University of Latvia
Mailing Address : Institute of Astronomy University of Latvia
: Jelgavas 3, Riga, Latvia LV-1004
Website :
Primary Contact
Contact Name : Kalvis Salmins
Telephone (primary) : 371 26594290
Telephone (secondary) :
Fax :
E-mail : kalvis.salmins@lu.lv
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Tertiary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Additional Information :
Back to top
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 :
Back to top
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 : YES
Additional Information :
Back to top
Riga: Meteorological data
Note: For a larger view, please select a thumbnail.
| Type | Since 2012 | Monthly Average Offset |
|---|---|---|
| Temperature |  |
 |
Humidity |  |
 |
| Pressure |  |
 |
Riga: LAGEOS performance
Note: For a larger view, please select a thumbnail.
| type | Since 2012 | Monthly average |
|---|---|---|
| RMS |  |
 |
| Cal RMS |  |
|
| Sys Dly |  |
 |
| Obs per NPT |
 |
 |
| FR Obs per Pass |
 |
 |
Riga: 7-day tracking information
Click on a plot to view a larger image.
| Days ago | |
|---|---|
| 1 |  |
| 2 |  |
| 3 |  |
| 4 |  |
| 5 |  |
| 6 |  |
| 7 |  |
Riga: Satellite Information (as a function of local time and satellite range)
Click on a plot to view a larger image.
| satellite | local time | range | ||
|---|---|---|---|---|
| npt rms | numFR /npt | npt rms | numFR /npt |
|
| Ajisai 30 sec |
 |
 |
 |
 |
| Cryosat-2 15 sec |
 |
 |
 |
 |
| Etalon-1 300 sec |
 |
 |
 |
 |
| Etalon-2 300 sec |
 |
 |
 |
 |
| Galileo-102 300 sec |
 |
 |
|
 |
| Galileo-202 300 sec |
 |
 |
|
 |
| Galileo-209 300 sec |
 |
 |
|
 |
| Galileo-210 300 sec |
 |
 |
|
 |
| GLONASS-131 300 sec |
 |
 |
 |
 |
| GLONASS-134 300 sec |
 |
 |
 |
 |
| GLONASS-138 300 sec |
 |
 |
 |
 |
| GLONASS-139 300 sec |
 |
 |
 |
 |
| GRACE-FO-1 5 sec |
 |
 |
 |
 |
| GRACE-FO-2 5 sec |
 |
 |
 |
 |
| Jason-3 15 sec |
 |
 |
 |
 |
| LAGEOS-1 120 sec |
 |
 |
 |
 |
| LAGEOS-2 120 sec |
 |
 |
 |
 |
| LARES 30 sec |
 |
 |
 |
 |
| Starlette 30 sec |
 |
 |
 |
 |
| Stella 30 sec |
 |
 |
 |
 |
| Swarm-A 5 sec |
 |
 |
 |
 |
| Swarm-B 5 sec |
 |
 |
 |
 |
| Swarm-C 5 sec |
 |
 |
 |
 |
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- Web Curator: Lori J. Tyahla
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