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Riga: 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)    : Kalvis Salminsh
       Preparer E-mail            : kalvis.salmins@lu.lv
       Date Prepared              : 2016-07-27
       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       : Concrete monolith.
       Monument Inscription       : none
       Mark Description           : brass rod
       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]: 3183895.880
         Y coordinate          [m]: 1421497.086
         Z coordinate          [m]: 5322803.800
         Latitude            [deg]: 56.948551 N
         Longitude           [deg]: 24.059075 E
         Elevation             [m]: 31.3367
       Additional Information     : ITRF 2005 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]: 0.0
         East                  [m]: 0.0
         Up                    [m]: 0.0
         Date Measured            : 1987-09-01
       Date Installed             : 1987-09-01
       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                    : ALT-AZ
       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 mirrors
       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
       Transmit Efficiency        : 0.6
       Receive Efficiency         : 0.3
       Date Installed             : 1987-09-01
       Date Removed               : 2008-01-01
       Additional Information     : (multiple lines)
  
  
  4.02 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 MIRRORS
       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
       Transmit Efficiency        : ~0.60
       Receive Efficiency         : ~0.30
       Date Installed             : 2008-01-01
       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 three-pass
       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               : 2004-12-15
       Additional Information     : (multiple lines)
  
  
  5.02 Laser Type                 : ND:YAG
       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
       Pulse Width (FWHM)     [ps]: 150
       Max. Repetition Rate   [Hz]: 10
       Fullw. Beam Divergence  ["]: 4-40
       Final Beam Diameter     [m]: 0.008
       Eyesafe                    : NO
       Eyesafe Standard           : NONE
       Date Installed             : 2004-12-15
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : three-pass amplifier
  
  
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  6.   Receiver System
  
  6.01. 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      ["]: 180
            Date Installed        : 1999-09-20
            Date Removed          : 2001-04-30
          Signal Processing       : CFD
            Manufacturer          : TENNELEC
            Model                 : TC-454
            Date Installed        : 2000-07-10
            Date Removed          : 2001-04-30
            Amplitude Measurement : YES, Fast amplitude converter,
                                     Custom made
            Return-rate Controlled: NO
            Mode of Operation     : MULTI-SINGLE
          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  : (multiple lines)
  
  
  6.02. Primary Chain
          Wavelength          [nm]: 532.0
          Detector Type           : PMT module
            Manufacturer          : Hamamatsu
            Model                 : H6780-20
            Quantum Efficiency [%]: 31
            Nominal Gain          : 1x10E6
            Rise Time         [ps]: 780
            Jitter (Single PE)[ps]: 240
            Field of View      ["]: 180
            Date Installed        : 2001-04-30
            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.  : 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
  
  6.03. Primary Chain
          Wavelength          [nm]: 532.0
          Detector Type           : PMT module
            Manufacturer          : Hamamatsu
            Model                 : H11901-20
            Quantum Efficiency [%]: 18
            Nominal Gain          : 1x10E6
            Rise Time         [ps]: 570
            Jitter (Single PE)[ps]: NA
            Field of View      ["]: 120
            Date Installed        : 2016-04-28
            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.  : Event timer
            Manufacturer          : EDI Latvia
            Model                 : RTS-2006
            Resolution        [ps]: 6
            Precision         [ps]: 10
            Date Installed        : 2006-06-06
            Date Removed          : (yyyy-mm-dd)
          Additional Information  : RTS-2006 is based on Riga ET-A032
  
  
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  7.   Tracking Capabilities
  
  7.01 Satellites
         Very Low Alt (<400 km)   : NIGHT/TWILIGHT
         Low Altitude (400-2000)  : NIGHT/TWILIGHT
         Lageos                   : NIGHT
         GLONASS                  : NIGHT
         Etalon                   : NIGHT
         GPS                      : NIGHT
         Moon                     : NO
       Avge 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["]: none
       Min. Tracking Elev.   [deg]: 15
       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
       Date First Applicable      : 1987-09-05
       Date Last Applicable       : 2016-07-27
       Additional Information     : (multiple lines)
  
 7.02 Satellites
         Very Low Alt (<400 km)   : NIGHT/TWILIGHT
         Low Altitude (400-2000)  : NIGHT/TWILIGHT
         Lageos                   : NIGHT/TWILIGHT
         GLONASS                  : NIGHT
         Etalon                   : NIGHT
         GPS                      : NIGHT
         Moon                     : NO
       Avge 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["]: none
       Min. Tracking Elev.   [deg]: 15
       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
       Date First Applicable      : 2016-07-27
       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 & EXTERNAL
       Target Type                : Fiber-optics cable, flat surface,CCR
       Target Structure           : METAL POLE
       Target Distance         [m]: 154.7120,41.730,16.399
         Date Measured            : 1998-10-15
         Accuracy (mm)        [mm]: 10
         Verification             : (multiple lines)
       Return-rate Controlled     : NO
       Mode of Operation          : MULTI,full range for scaling.
       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
       Application of Cal Data    : LINEAR FIT
       Date Installed             : 1998-10-10
       Date Removed               : 2006-07-10
       Additional Information     : (multiple lines)
  
  
  
  8.02 Calibration Type           : PRE+POST
       Target Location            : INTERNAL&EXTERNAL
       Target Type                : Fiber-optics cable, flat surface, CCR
       Target Structure           : METAL POLE
       Target Distance         [m]: 153.41, 41.730,
         Date Measured            : many sessions
         Accuracy (mm)        [mm]: 10
       Verification               : internal calibration checked with external
       Return-rate Controlled     : YES
       Mode of Operation          : Single to Multi Photons
       Average Cal Interval  [min]: 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     : (multiple lines)
 
 
  8.03 Calibration Type           : PRE+POST
       Target Location            : INTERNAL&EXTERNAL
       Target Type                : Fiber-optics cable, CCR
       Target Structure           : CCR at front of telescope
       Target Distance         [m]: 25.003, 1.289
         Date Measured            : many sessions
         Accuracy (mm)        [mm]: 2-3
       Verification               : internal calibration checked with external
       Return-rate Controlled     : YES
       Mode of Operation          : Single to Multi Photons
       Average Cal Interval  [min]: 120
       Single Shot RMS        [mm]: 7-8
       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               : (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          : UTC(GPS)
          Synchronization         : GPS
          Epoch Accuracy      [ns]: 200
          Date Installed          : 1980-01-15
          Date Removed            : 2014-02-25
          Additional Information  : (multiple lines)
  
  9.01.02 Frequency Standard Type : Rubidium disciplined by GPS
          Model                   : SecureSync 1200-033
          Manufacturer            : Spectracom
          Short Term Stab.  [e-12]: 20 1 sec, Allan variance
          Long Term Stab.   [e-12]: 50 1 month, without GPS
          Time Reference          : UTC(GPS)
          Synchronization         : GPS
          Epoch Accuracy      [ns]: <30
          Date Installed          : 2014-02-25
          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            : 2001-06-01
          Additional Information  : (multiple lines)
  
  9.02.02 GPS Timing Rcvr Model   : 58540A
          Manufacturer            : SIMMETRICOM
          Date Installed          : 2001-06-01
          Date Removed            : 2014-02-25
          Additional Information  : (multiple lines)
  
  9.02.03 GPS Timing Rcvr Model   : SecureSync 1200-033
          Manufacturer            : Spectracom
          Date Installed          : 2014-02-25
          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             : Orbital & 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             : visual
       Date Installed             : (yyyy-mm-dd)
       Date Removed               : (yyyy-mm-dd)
       Additional Information     : (multiple lines)
  
 11.02 Detection Type             : ADS-B receiver + visual
       Date Installed             : 2014-03-11
       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          : 1987-09-01
          Calibration Interval    : YEARLY
          Date Removed            : 2007-03-30
          Additional Information  : (multiple lines)
  
 12.01.02 Pressure Sensor Model   : BAROCAP
          Manufacturer            : VAISALA
          Recording Interval      : 10 min
          Accuracy          [HPA] : 0.5
          Height Diff to SRP   [m]: +2
          Date Installed          : 2007-03-30
          Calibration Interval    : YEARLY
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : BAROCAP belongs to WXT510 Vaisala
                                  : Weather transmitter
  
 12.02.01 Temp Sensor Model       : Mercury Thermometer
          Manufacturer            : unknown
          Recording Interval      : PER PASS
          Accuracy         [deg C]: 0.2
          Date Installed          : 1987-09-01
          Calibration Interval    : YEARLY to Riga Meteo
          Date Removed            : 2007-03-30
          Additional Information  : (multiple lines)
  
 12.02.02 Temp Sensor Model       : TERMOCAP
          Manufacturer            : VAISALA
          Recording Interval      : 10 min
          Accuracy         [deg C]: 0.3
          Date Installed          : 2007-03-30
          Calibration Interval    : YEARLY
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : TERMOCAP belongs to WXT510 Vaisala
                                  : Weather transmitter
 
 12.03.01 Humidity Sensor Model   : hair hygrometer,psychrometer
          Manufacturer            : unknown
          Recording Interval      : PER PASS
          Accuracy       [% rel h]: 15
          Date Installed          : 1987-09-01
          Calibration Interval    : MONTHLY to Riga meteo
          Date Removed            : 2007-03-30
          Additional Information  : (multiple lines)
  
  
 12.03.02 Humidity Sensor Model   : HUMICAP180
          Manufacturer            : VAISALA
          Recording Interval      : 10 min
          Accuracy       [% rel h]: 3
          Date Installed          : 2007-03-30
          Calibration Interval    : YEARLY
          Date Removed            : (yyyy-mm-dd hh:mm UT)
          Additional Information  : HUMICAP180 belongs to WXT510 Vaisala
                                  : Weather transmitter
  
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 13.   Local Ties, Eccentricities, and Collocation Information
  
 13.01 Collocated Permanent Geodetic Systems
  
       GPS                        : EUREF, IGS
         Date Installed           : 1995-12-05
         Date Removed             : (yyyy-mm-dd)
         Additional Information   : (multiple lines)
       GLONASS                    : EUREF
         Date Installed           : 2013-12-11
         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), 2013.FGI
         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                     : Institute of Astronomy
                                  : University of Latvia
       Mailing Address            : Blv.Rainis 19, Riga, LV-1586, Latvia
       Primary Contact
         Contact Name             : MSC Kalvis Salminsh
         Telephone (primary)      : 371 6 7034580
         Telephone (secondary)    : 371 26594290
         Fax                      : 371 6 7034582
         E-mail                   : kalvis.salmins@lu.lv
       Secondary Contact
         Contact Name             : Dr. Jorge R. del Pino
         Telephone (primary)      : 371 6 7611984
         Telephone (secondary)    : 371 26585990
         Fax                      : 371 6 7034582
         E-mail                   : Jorge.delPino@lu.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            : YES
       Additional Information     : (multiple lines)
  
 
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