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Lhasa: 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) : Guo Tangyong
Preparer E-mail : whslr@public.wh.hb.cn, guoty@21cn.com
Date Prepared : 2002-05-09
Report Type : UPDATE
Site Log Format Version : 2.0
Site Log Revision :
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1. Identification of the Ranging System Reference Point (SRP)
Site Name : Lhasa (TROS) SLR Station
IERS DOMES Number : 21613M003
CDP Pad ID : 7356
Subnetwork : WPLTN
Description : MONUMENT
Monument Description : concrete
Monument Inscription : Lhasa SLR 7356 2001.7
Mark Description : Circle hat with diameter 4cm
Date Installed : 2001-07-10
Date Removed :
Geologic Characteristic : BEDROCK
Additional Information :
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2. Site Location Information
City or Town : Lhasa
State or Province : Xizang
Country : China
Tectonic Plate : Eurasian
Local Time (UTC +/- hours) :
Approximate Position
X coordinate [m]: -100535.761
Y coordinate [m]: 5550605.396
Z coordinate [m]: 3137037.869
Latitude [deg]: 29.6349 N
Longitude [deg]: 91.0377 E
Elevation [m]: 3604.144
Survey Method :
Date Measured :
Additional Information :
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3. General System Information
3.01 System Name : TROS
4-Character Code : LHAL
CDP System Number : 84
CDP Occupation Number : 01
Eccentricity to SRP (if Not Identical With SRP)
North [m]: 0.000 +- 0.001
East [m]: 0.000 +- 0.001
Up [m]: 1.9041 +- 0.001
Date Measured : 2001-08-03
Date Installed : 1999-12-28
Date Removed :
Additional Information :
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4. Telescope Information
4.01 Receiving Telescope Type : spherical REFRACTOR
Aperture [m]: 0.38
Mount : ALT-AZ
Date Installed :
Date Removed :
Xmitting Telescope Type : GALILEI
Aperture [m]: 0.10
Date Installed :
Date Removed :
Tracking Camera Type : ICCD
Model : M40
Manufacturer : YNGYC
Field of View [deg]: 0.04
Minimum Magnitude [mag]: 13
Date Installed :
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 5
Max Slew Rate El [deg/s]: 5
Max Used Tracking Rate Az : 2
Max Used Tracking Rate El : 2
Telescope Shelter : SEALED DOME
Daylight Filter Type : Unknown
Dayl. Filt. Bandwidth [nm]: 0.3
Adjustable Attenuation : TRANSMIT
Adjustable Field of View :
Transmit Efficiency : 0.38
Receive Efficiency : N.A.
Date Installed : 2000-08-20
Date Removed :
Additional Information : Receive Efficiency: unknown
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model :
Manufacturer :
Number of Amplifiers : 1
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: N.A.
Secondary Wavelength [nm]: 532.1
Secondary Max. Energy [mJ]: 15
Xmit Energy Adjustable : NO
Additional Information :
Pulse Width (FWHM) [ps]: 30
Max. Repetition Rate [Hz]: 10
Fullw. Beam Divergence ["]: 10 - 60
Theoretical Beam Div :
Measured Beam Div :
Method Used :
Additional Information :
Final Beam Diameter [m]: 0.07
Eyesafe : NO
Eyesafe Standard : N.A.
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 : 2000-05-01
Date Removed :
Additional Information : Primary Maximum Energy:
: not used for laser ranging
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : CSPAD
Manufacturer : PESO Consulting
Model : 0407
Quantum Efficiency [%]: 20
Nominal Gain :
Rise Time [ps]: 100
Jitter (Single PE)[ps]: 22
Field of View Diam ["]: 120
Date Installed : 2000-05-01
Date Removed :
Amplifier Type :
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : Time Walk Compensated
Manufacturer : Graz
Model :
Date Installed : 2000-05-01
Date Removed :
Amplitude Measurement : N.A.
Return-Rate Controlled: NO
Mode of Operation : Single to Multi Photons
Additional Information:
Time of Flight Observ. : INTERVAL
Manufacturer : Stanford
Model : 620
Resolution [ps]: 4
Precision [ps]: 30
Date Installed : 2000-02-01
Date Removed :
Additional Information : Rise Time: <100
6.02.01 Secondary 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 :
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 :
Moon : NO
Ave. Pass Switch Time [s]: 20
Average values for LAGEOS
Single Shot RMS [mm]: 30
# of Obs per NP : 60
Use of Semi-trains : YES
# of Semi-train Tracks : 4
Range Gate Width [ns]: 10 - 10000
Beam Pointing Accuracy ["]: 5
Angle Encoder Resolution["]: 1
Min. Tracking Elev. [deg]: 12
Laser Polarization @emitter:
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 15
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 : 2000-01-15 HH:MM UT
Date Last Applicable :
Additional Information :
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : EXTERNAL
Target Type : FLAT SURFACE
Target Structure : METAL POLE
Number of Targets :
Target Distance(s) [m]: 0.560
Date Measured : 2000-02-01
Accuracy [mm]: 4
Verification :
Return-Rate Controlled : NO
Eye-Safe Method :
Additional Information :
Mode of Operation : DON`T KNOW
Calibration performed : 180
Single Shot RMS [mm]: 15
Edit Criterion 1st Chain : ITERATIVE 2.2 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data : AVERAGE
Date Installed : 2000-01-25
Date Removed :
Additional Information :
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Oven Controlled Crystal Oscillator
Model : 58503
Manufacturer : HP
Short Term Stab. [e-12]: 5
Long Term Stab. [e-12]: 1
Time Reference : GPS
Synchronization : GPS
Epoch Accuracy [ns]: 150
Date Installed : 1999-07-01
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : 58503
Manufacturer : HP
Date Installed : 1999-07-01
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 : MANUAL
Edit Criterion 2nd Chain : N.A.
Upload interval : HOURLY
Date First Applicable : 2000-08-31 HH:MM UT
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : MOUNT OBSERVER
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed : 1999-07-01
Date Removed :
Additional Information :
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : WUPTH
Manufacturer : C&D
Recording Interval : PER PASS
Accuracy [mbar]: ~ 0.8
Height Diff to SRP [m]: ~ -0.9
Distance from SRP [m]:
Date Installed : 2000-07-01 HH:MM UT
Calibration Interval : YEARLY
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : WUPTH
Manufacturer : C&D
Recording Interval : PER PASS
Accuracy [deg C]: 0.2
Date Installed : 2000-07-01 HH:MM UT
Calibration Interval : YEARLY
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : WUPTH
Manufacturer : C&D
Recording Interval : PER PASS
Accuracy [% rel h]: 4
Date Installed : 2000-07-01 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
Date Installed : 1995-05-02
Date Removed :
Additional Info :
13.01.01.02 GNSS : NO
Date Installed :
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 : LHAS
Instrumentation Type : GPS
Instrumentation Status : PERMANENT
DOMES Number : 21613M001
CDP Number : N.A.
Differential Components (ITRS)
dx [m]: 6402.057 +- 0.000218
dy [m]: 1334.271 +- 0.001620
dz [m]: -2178.113 +- 0.000937
Date Measured : 2001-08-04
Determined by : Inst. of Seis., China Seismological Bureau
Date Installed :
Date Removed :
Additional Information : The dx,dy and dz are the system reference
: point(AZ EL INTERSECT) minus LHAS(GPS IGS)
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 : Institute of Seismology,
: China Seismological Bureau
Mailing Address : No. 70 Central Xiao Hong Shan district,
: Wuhan 430071, P.R. China
Website :
Primary Contact
Contact Name : SLR group
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail : whslr@public.wh.hb.cn, guoty@21cn.com
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
Tertiary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
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 : N.A.
Hardcopy on File
Site Map :
Site Diagram :
Horizon Mask :
Monument Description :
Site Pictures :
Additional Information :
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