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Tahiti: 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) : Robin L Dixon Preparer E-mail : rdixon07@peraton.com Date Prepared : 2023-06-29 Report Type : UPDATE Site Log Format Version : 2.0 Site Log Revision : Back to top 1. Identification of the Ranging System Reference Point (SRP) Site Name : Tahiti Geodetic Observatory IERS DOMES Number : 92201M007 CDP Pad ID : 7124 Subnetwork : NASA Description : MONUMENT Monument Description : PLATE Monument Inscription : NONE Mark Description : CHISELLED CROSS Date Installed : 1997-08-01 Date Removed : Geologic Characteristic : CONGLOMERATE Additional Information : Back to top 2. Site Location Information City or Town : Punaauia State or Province : Tahiti Country : French Polynesia Tectonic Plate : Pacific Local Time (UTC +/- hours) : Approximate Position X coordinate [m]: -5246406.607 Y coordinate [m]: -3077285.162 Z coordinate [m]: -1913814.321 Latitude [deg]: 17.5768 S Longitude [deg]: 210.3937 E Elevation [m]: 82.171 Survey Method : Date Measured : Additional Information : Back to top 3. General System Information 3.01 System Name : MOBLAS-8 4-Character Code : THTL CDP System Number : 08 CDP Occupation Number : 02 Eccentricity to SRP (if Not Identical With SRP) North [m]: -0.015 +- 0.002 East [m]: 0.011 +- 0.002 Up [m]: 3.143 +- 0.002 Date Measured : 1999-12-15 Date Installed : 1997-08-01 Date Removed : Additional Information : The eccentricities in this section may not : be current and may not contain the entire : history. The official set of site : eccentricities are maintained in the : following two SINEX data bases at: : : https://cddis.nasa.gov/archive/ : slr/slrocc/ecc_xyz.snx : : and : : https://cddis.nasa.gov/archive/ : slr/slrocc/ecc_une.snx Back to top 4. Telescope Information 4.01 Receiving Telescope Type : CASSEGRAIN Aperture [m]: 0.762 Mount : AZ-EL Date Installed : Date Removed : Xmitting Telescope Type : REFRACTOR Aperture [m]: 0.163 Date Installed : Date Removed : Tracking Camera Type : CCD Model : GEN II INTENSIFIER Manufacturer : HTSI Field of View [deg]: Minimum Magnitude [mag]: Date Installed : Date Removed : Transmit/Receive Path : SEPARATE Transmit/Receive Switch : NONE Max Slew Rate Az [deg/s]: 20 Max Slew Rate El [deg/s]: 5 Max Used Tracking Rate Az : 5 Max Used Tracking Rate El : 2 Telescope Shelter : ROLL-BACK ROOF Daylight Filter Type : Omega Optical 532NB1 9114 Dayl. Filt. Bandwidth [nm]: 100 Adjustable Attenuation : RECEIVE Adjustable Field of View : Transmit Efficiency : 0.94 Receive Efficiency : 0.76 Date Installed : 1997-08-01 Date Removed : Additional Information : Back to top 5. Laser System Information 5.01 Laser Type : ND:YAG Model : Manufacturer : Number of Amplifiers : 1 Primary Wavelength [nm]: 1064 Primary Maximum Energy [mJ]: 200 Secondary Wavelength [nm]: 532 Secondary Max. Energy [mJ]: 100 Xmit Energy Adjustable : YES Additional Information : Pulse Width (FWHM) [ps]: 200 Max. Repetition Rate [Hz]: 10 Fullw. Beam Divergence ["]: 30 Theoretical Beam Div : Measured Beam Div : Method Used : Additional Information : Final Beam Diameter [m]: 0.093 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 : 1997-08-01 Date Removed : Additional Information : 1) Laser repetition rate is 10 Hz : 2) Saturable laser upgrade 2008-04-08 Back to top 6. Receiver System 6.01.01 Primary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : ITT Model : F4129F Quantum Efficiency [%]: 17.7 Nominal Gain : 1e6 Rise Time [ps]: 350 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 1997-08-01 Date Removed : 2008-06-27 Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : CFD Manufacturer : Tennelec Model : TC454 Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Few to Multi Photons Additional Information: Time of Flight Observ. : INTERVAL Manufacturer : Hewlett-Packard Model : 5370B Resolution [ps]: 20 Precision [ps]: 35 Date Installed : 1997-08-01 Date Removed : 2020-05-04 Additional Information : 6.01.02 Primary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : Photek Model : PMT318 Quantum Efficiency [%]: 13.12 Nominal Gain : 1e7 Rise Time [ps]: 250 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 2008-06-27 Date Removed : Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : CFD Manufacturer : Tennelec Model : TC454 Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Few to Multi Photons Additional Information: Time of Flight Observ. : INTERVAL Manufacturer : Hewlett-Packard Model : 5370B Resolution [ps]: 20 Precision [ps]: 35 Date Installed : 1997-08-01 Date Removed : 2020-05-04 Additional Information : 6.01.03 Primary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : Photek Model : PMT318 Quantum Efficiency [%]: 13.12 Nominal Gain : 1e7 Rise Time [ps]: 2 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 2008-06-27 Date Removed : Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : CFD Manufacturer : Ten Model : TC Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Few to Multi Photons Additional Information: Time of Flight Observ. : Epoch Manufacturer : Cybioms Model : cybi-ETM-02 Resolution [ps]: 1 Precision [ps]: 3 Date Installed : 2019-10-22 Date Removed : Additional Information : The HP5370B is no longer primary as of 2020- : 05-04, its data is not sent to the SLR data : centers. First available data from the ETM : was provided on 2019-10-22, and was released : from quarantine on 2020-05-04. 6.02.01 Secondary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : ITT Model : F4129F Quantum Efficiency [%]: 17.7 Nominal Gain : 1e6 Rise Time [ps]: 350 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 1997-08-01 Date Removed : 2008-06-27 Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : CFD Manufacturer : Tennelec Model : TC454 Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Single to Multi Photons Additional Information: Time of Flight Observ. : INTERVAL Manufacturer : Hewlett-Packard Model : 5370B Resolution [ps]: 20 Precision [ps]: 35 Date Installed : 1997-08-01 Date Removed : Additional Information : High sensivity laser receiver configuration : installed 14-May-2012. Everything is the same : as the primary chain except the discriminator : threshold has been lowered to accept single : photons and then amplified with 24db of gain. 6.02.02 Secondary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : Photek Model : PMT Quantum Efficiency [%]: 13.12 Nominal Gain : 1e7 Rise Time [ps]: 250 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 2008-06-27 Date Removed : Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : CFD Manufacturer : Tennelec Model : TC454 Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Single to Multi Photons Additional Information: Time of Flight Observ. : INTERVAL Manufacturer : Hewlett-Packard Model : 5370B Resolution [ps]: 20 Precision [ps]: 35 Date Installed : 1997-08-01 Date Removed : 2020-05-04 Additional Information : High sensivity laser receiver configuration : installed 14-May-2012. Everything is the same : as the primary chain except the discriminator : threshold has been lowered to accept single : photons and then amplified with 24db of gain. 6.02.03 Secondary Chain Wavelength [nm]: 532 Detector Type : MCP Manufacturer : Photek Model : PMT Quantum Efficiency [%]: 13.12 Nominal Gain : 1e7 Rise Time [ps]: 2 Jitter (Single PE)[ps]: 100 Field of View Diam ["]: 360 Date Installed : 2008-06-27 Date Removed : Amplifier Type : Manufacturer : Model : Gain : Bandwidth : Date Installed : Date Removed : Additional Information: Signal Processing : C Manufacturer : T Model : TC Date Installed : 1997-08-01 Date Removed : Amplitude Measurement : YES Return-Rate Controlled: YES Mode of Operation : Few to Multi Photons Additional Information: Time of Flight Observ. : Epoch Manufacturer : Cybio Model : cybi-ETM-02 Resolution [ps]: 1 Precision [ps]: 3 Date Installed : 2019-10-22 Date Removed : Additional Information : High sensivity laser receiver configuration : installed 14-May-2012. Everything is the same : as the primary chain except the discriminator : threshold has been lowered to accept single : photons and then amplified with 24db of gain. : : The HP5370B is no longer primary as of 2020- : 05-04, its data is not sent to the SLR data : centers. ETM data was first collected on : 2019-10-22, and was released from quarantine : on 2020-05-04. 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 : Back to top 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 : NO Geosynchronous : Moon : NO Ave. Pass Switch Time [s]: 60 Average values for LAGEOS Single Shot RMS [mm]: 10 # of Obs per NP : 50 Use of Semi-trains : NO # of Semi-train Tracks : N.A. Range Gate Width [ns]: 2000 Beam Pointing Accuracy ["]: 0.6 Angle Encoder Resolution["]: 0.6 Min. Tracking Elev. [deg]: 20 Laser Polarization @emitter: Operation Months per Year : 12 Days per Week : 5 Hours per Day : 16 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 : 1997-08-01 HH:MM UT Date Last Applicable : Additional Information : station is not available for ranging on : holidays Back to top 8. Calibration 8.01 Calibration Type : PRE+POST Target Location : EXTERNAL Target Type : CORNER CUBE Target Structure : CONCRETE PIER Number of Targets : Target Distance(s) [m]: 263 Date Measured : 1999-12-15 Accuracy [mm]: 2 Verification : first order survey and ranging to : multiple ground targets Return-Rate Controlled : YES Eye-Safe Method : Additional Information : Mode of Operation : FEW/MULTI PHOTON Calibration performed : 3.5 Single Shot RMS [mm]: 6 Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA Edit Criterion 2nd Chain : N.A. Application of Cal Data : AVERAGE Date Installed : 1997-08-01 Date Removed : Additional Information : Back to top 9. Time and Frequency Standards 9.01.01 Frequency Standard Type : Rubidium disciplined by GPS Model : XL-DC 151-358-108-2 Manufacturer : Symmetricom (TrueTime) Short Term Stab. [e-12]: 10 Long Term Stab. [e-12]: 3 Time Reference : GPS Synchronization : GPS Epoch Accuracy [ns]: 100 Date Installed : 1999-08-19 Date Removed : 2023-04-06 Additional Information : 9.01.02 Frequency Standard Type : GPS Steered Rubidium Model : FS740 Manufacturer : Stanford Research Short Term Stab. [e-12]: 100 Long Term Stab. [e-12]: 3 Time Reference : GPS Synchronization : GPS Epoch Accuracy [ns]: 150 Date Installed : 2023-04-06 Date Removed : Additional Information : Actual accuracy of UTC is less then 100 ns. 9.02.01 GNSS Timing Rcvr Model : XL-DC 151-358-108-2 Manufacturer : Symmetricom (TrueTime) Date Installed : 1999-08-12 Date Removed : Additional Information : CNS clock used for comparisons 9.03.01 One-way System Calibration Date performed : Direction Calibrated : Additional Information : Back to top 10. Preprocessing Information 10.01 On-site NP Generation : YES Data Screening : IRV+POLYNOMIAL Return-Rate Rejection : Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA Edit Criterion 2nd Chain : NONE Upload interval : HOURLY Date First Applicable : 1997-08-01 HH:MM UT Date Last Applicable : 2002-02-03 HH:MM UT Additional Information : 10.02 On-site NP Generation : YES Data Screening : IRV+POLYNOMIAL Return-Rate Rejection : Edit Criterion 1st Chain : ITERATIVE 3.0 SIGMA Edit Criterion 2nd Chain : NONE Upload interval : HOURLY Date First Applicable : 2002-02-03 HH:MM UT Date Last Applicable : Additional Information : Generic Normal Processing Version 2.0 : installed 2002-02-03 Back to top 11. Aircraft Detection 11.01 Detection Type : RADAR Manufacturer/Provider : Automatic Laser Shutoff : Alarms Recorded : Hazard Distance [km]: Date Installed : 1997-08-01 Date Removed : Additional Information : Back to top 12. Meteorological Instrumentation 12.01.01 Pressure Sensor Model : MET3 Manufacturer : Paroscientific Recording Interval : PER PULSE Accuracy [mbar]: 0.1 Height Diff to SRP [m]: -0.15 Distance from SRP [m]: Date Installed : 2000-04-25 HH:MM UT Calibration Interval : YEARLY Date Removed : 2011-07-11 HH:MM UT Additional Information : 12.01.02 Pressure Sensor Model : MET4 Manufacturer : Paroscientific Recording Interval : PER PULSE Accuracy [mbar]: 0.08 Height Diff to SRP [m]: -0.15 Distance from SRP [m]: Date Installed : 2011-07-11 HH:MM UT Calibration Interval : biyearly Date Removed : Additional Information : 12.02.01 Temp Sensor Model : MET3 Manufacturer : Paroscientific Recording Interval : PER PULSE Accuracy [deg C]: 0.5 Date Installed : 2000-04-25 HH:MM UT Calibration Interval : YEARLY Date Removed : 2011-07-11 HH:MM UT Additional Information : 12.02.02 Temp Sensor Model : MET4 Manufacturer : Paroscientific Recording Interval : EVERY PULSE Accuracy [deg C]: 0.2 Date Installed : 2011-07-11 HH:MM UT Calibration Interval : BIYEARLY Date Removed : Additional Information : 12.03.01 Humidity Sensor Model : MET3 Manufacturer : Paroscientific Recording Interval : PER PULSE Accuracy [% rel h]: 2 Date Installed : 2000-04-25 HH:MM UT Calibration Interval : YEARLY Date Removed : 2011-07-11 HH:MM UT Additional Information : 12.03.02 Humidity Sensor Model : MET4 Manufacturer : Paroscientific Recording Interval : PER PASS Accuracy [% rel h]: 2 Date Installed : 2011-07-11 HH:MM UT Calibration Interval : BIYEARLY Date Removed : Additional Information : Back to top 13. Local Ties, Eccentricities, and Collocation Information 13.01 Collocated Permanent Geodetic Systems 13.01.01.01 GNSS : IGS Date Installed : 1998-11-22 Date Removed : Additional Info : 13.01.01.02 GNSS : IGS Date Installed : 2000-08-25 Date Removed : Additional Info : 13.01.01.03 GNSS : NO Date Installed : Date Removed : Additional Info : 13.01.02.01 DORIS : IDS Date Installed : 1998-04-16 Date Removed : Additional Info : PAQB 13.01.02.02 DORIS : IDS Date Installed : 1995-07-27 Date Removed : 1998-04-13 Additional Info : PAPB 13.01.03.01 PRARE : YES Date Installed : 1996-08-16 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 : Instrumentation Type : Instrumentation Status : DOMES Number : CDP Number : Differential Components (ITRS) dx [m]: dy [m]: dz [m]: Date Measured : Determined by : Date Installed : Date Removed : Additional Information : 13.03.01.01 Eccentricities Between Other Monuments on Site From: Monument Name : MOBLAS-8 DOMES Number : 92201M007 CDP Number : 7124 To: Monument Name : PAPB DORIS DOMES Number : 92201S007 CDP Number : N.A. Differential Components (ITRS) dx [m]: -173.0775 +- 0.002 dy [m]: 311.888 +- 0.002 dz [m]: 37.0642 +- 0.002 Date Measured : Determined by : IGN Additional Information : values in previous site log were : in error 13.03.02.01 Eccentricities Between Other Monuments on Site From: Monument Name : MOBLAS-8 DOMES Number : 92201M007 CDP Number : 7124 To: Monument Name : PAQB DOMES Number : 92201S008 CDP Number : N.A. Differential Components (ITRS) dx [m]: -7.3265 +- 0.002 dy [m]: 18.193 +- 0.002 dz [m]: -25.9328 +- 0.002 Date Measured : Determined by : IGN Additional Information : 13.03.03.01 Eccentricities Between Other Monuments on Site From: Monument Name : MOBLAS-8 DOMES Number : 92201M007 CDP Number : 7124 To: Monument Name : TAHI DOMES Number : 92201M006 CDP Number : N.A. Differential Components (ITRS) dx [m]: -162.0445 +- 0.002 dy [m]: 295.485 +- 0.002 dz [m]: 36.6482 +- 0.002 Date Measured : Determined by : IGN Additional Information : 13.03.04.01 Eccentricities Between Other Monuments on Site From: Monument Name : MOBLAS-8 DOMES Number : 92201M007 CDP Number : 7124 To: Monument Name : THTI DOMES Number : 92201M009 CDP Number : N.A. Differential Components (ITRS) dx [m]: -8.4555 +- 0.002 dy [m]: 24.551 +- 0.002 dz [m]: -28.2988 +- 0.002 Date Measured : Determined by : IGN Additional Information : Back to top 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 : Tahiti Geodetic Observatory Mailing Address : UPF, BP 6570, 98702 Faaa Aeroport, : Tahiti - French Polynesia Website : Primary Contact Contact Name : Jean-Pierre Barriot Telephone (primary) : (689) 803 884 Telephone (secondary) : (689) 866 426 Fax : (689) 803 842 E-mail : barriot@upf.pf Secondary Contact Contact Name : Yannick Vota Telephone (primary) : (689) 866 426 Telephone (secondary) : (689) 710 707 Fax : (689) 803 842 E-mail : Yannick.Vota@upf.pf Tertiary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : Back to top 16. Responsible Agency (if different from 15.) Agency : NASA Mailing Address : Goddard Space Flight Center, Code 61A : 8800 Greenbelt Road : Greenbelt, MD 20771 USA Primary Contact Contact Name : Dorman Jeffrey Telephone (primary) : 301-286-1128 Telephone (secondary) : Fax : E-mail : jeffrey.l.dorman@nasa.gov Secondary Contact Contact Name : Stephen Merkowitz Telephone (primary) : 301-286-9412 Telephone (secondary) : Fax : E-mail : stephen.m.merkowitz@nasa.gov Additional Information : Back to top 17. More Information URL for More Information : http://gepasud.upf.pf/ Hardcopy on File Site Map : NO Site Diagram : NO Horizon Mask : NO Monument Description : NO Site Pictures : NO Additional Information : Back to top
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