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Xian
Jump to: Photo, Contact, Coordinates, News, Links
Xian Contact:
| Agency | National Time |
| Mailing Address | Shuyuan East Road No.3, Lintong,Xi`an, |
| Primary Contact | |
| Contact Name | Yang Xuhai |
| Telephone (primary) | +86-029-83890424 |
| Telephone (secondary) | |
| Fax | +86-029-83890196 |
| yyang@ntsc.ac.cn | |
| Secondary Contact | |
| Contact Name | Wang Xiao |
| Telephone (primary) | +86-029-83893326 |
| Telephone (secondary) | |
| Fax | +86-029-83890196 |
| wangxiao@ntsc.ac.cn | |
Xian Coordinates:
Approximate Position:
| X coordinate | [m] | -1735046.9 |
| Y coordinate | [m] | 4978437.1 |
| Z coordinate | [m] | 3579256.3 |
| Latitude | [deg] | 34.3517 N |
| Longitude | [deg] | 109.2141 E |
| Elevation | [m] | 940.297 |
| Survey Method | ||
| Date Measured | ||
| Additional Information | The site is located at the top of the | |
Xian News:
Local Events:
No local events found.
SLRMail Messages:
No SLRMail mesages found.Xian Link:
Xian: 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) : Yang Xuhai
Preparer E-mail : yyang@ntsc.ac.cn
Date Prepared : 2025-04-08
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 : Xian
IERS DOMES Number :
CDP Pad ID : 7329
Subnetwork : N.A.
Description : AZ EL INTERSECT
Monument Description : N.A.
Monument Inscription : N.A.
Mark Description : N.A.
Date Installed : 2023-11-24
Date Removed :
Geologic Characteristic : BEDROCK
Additional Information : The site is located in northeast
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2. Site Location Information
City or Town : Xi`an
State or Province : Shaanxi
Country : China
Tectonic Plate : Eurasian
Local Time (UTC +/- hours) : 8
Approximate Position
X coordinate [m]: -1735046.9
Y coordinate [m]: 4978437.1
Z coordinate [m]: 3579256.3
Latitude [deg]: 34.3517 N
Longitude [deg]: 109.2141 E
Elevation [m]: 940.297
Survey Method : GNSS CAMPAIGN
Date Measured : 2024-10-13
Additional Information : The site is located at the top of the
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3. General System Information
3.01 System Name : Xian
4-Character Code : ntsc
CDP System Number :
CDP Occupation Number :
Eccentricity to SRP (if Not Identical With SRP)
North [m]: N.A.
East [m]: N.A.
Up [m]: N.A.
Date Measured : N.A.
Date Installed : N.A.
Date Removed : N.A.
Additional Information : N.A.
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4. Telescope Information
4.01 Receiving Telescope Type : CASSEGRAIN
Aperture [m]: 1.05
Mount : AZ-EL
Date Installed : 2023-08-30
Date Removed :
Xmitting Telescope Type : GALILEI
Aperture [m]: 0.2
Date Installed : 2023-08-30
Date Removed :
Tracking Camera Type : CCD
Model : 910H
Manufacturer : Watec/Japan
Field of View [deg]: 0.02
Minimum Magnitude [mag]: 13
Date Installed : 2023-08-30
Date Removed :
Transmit/Receive Path : SEPARATE
Transmit/Receive Switch : NONE
Max Slew Rate Az [deg/s]: 10
Max Slew Rate El [deg/s]: 5
Max Used Tracking Rate Az : 4
Max Used Tracking Rate El : 1
Telescope Shelter : DOME
Daylight Filter Type : SPECTRAL FILTER
Dayl. Filt. Bandwidth [nm]: 0.2
Adjustable Attenuation : TRANSMIT
Adjustable Field of View :
Transmit Efficiency : 0.7
Receive Efficiency : 0.8
Date Installed : 2023-08-30
Date Removed :
Additional Information :
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5. Laser System Information
5.01 Laser Type : ND:YAG
Model :
Manufacturer : China
Number of Amplifiers : 5
Primary Wavelength [nm]: 1064
Primary Maximum Energy [mJ]: 20
Secondary Wavelength [nm]: 532
Secondary Max. Energy [mJ]: 12
Xmit Energy Adjustable : YES
Additional Information :
Pulse Width (FWHM) [ps]: 25
Max. Repetition Rate [Hz]: 1000
Fullw. Beam Divergence ["]: 35
Theoretical Beam Div : N.A.
Measured Beam Div : N.A.
Method Used : N.A.
Additional Information : N.A.
Final Beam Diameter [m]: 0.15
Eyesafe : NO
Eyesafe Standard : N.A.
Polarization on Exit : N.A.
Laser Fire Control : CONTROLLED
Laser Energy Monitor : N.A.
Start Diode Type : Silicon
Manufactorer :
Model :
Quantum Efficiency [%]:
Rise/Fall Time [ps]: 500
Date Installed : 2023-09-14
Date Removed :
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Additional Information :
Date Installed : 2023-09-14
Date Removed :
Additional Information :
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6. Receiver System
6.01.01 Primary Chain
Wavelength [nm]: 532
Detector Type : APD
Manufacturer : SHAO
Model : Si-200um
Quantum Efficiency [%]: 20
Nominal Gain : N.A.
Rise Time [ps]:
Jitter (Single PE)[ps]: 30
Field of View Diam ["]: 60
Date Installed : 2023-09-20
Date Removed :
Amplifier Type : N.A.
Manufacturer :
Model :
Gain :
Bandwidth :
Date Installed :
Date Removed :
Additional Information:
Signal Processing : N.A.
Manufacturer :
Model :
Date Installed :
Date Removed :
Amplitude Measurement : NO
Return-Rate Controlled: NO
Mode of Operation : SINGLE Photon
Additional Information:
Time of Flight Observ. : Event Timer
Manufacturer : SHAO
Model :
Resolution [ps]: 1
Precision [ps]: 8
Date Installed : 2024-09-20
Date Removed :
Additional Information :
6.02.01 Secondary Chain
Wavelength [nm]: N.A.
Detector Type : N.A.
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]: N.A.
Detector Type : N.A.
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) : NO
Low Altitude (400-2000) : YES
LAGEOS/LARES : YES
GLONASS : YES
Etalon : YES
GNSS : YES
Geosynchronous : YES
Moon : NO
Ave. Pass Switch Time [s]: ~30
Average values for LAGEOS
Single Shot RMS [mm]: 8
# of Obs per NP : 2000
Use of Semi-trains : NO
# of Semi-train Tracks :
Range Gate Width [ns]: 10 - 10000
Beam Pointing Accuracy ["]: 3
Angle Encoder Resolution["]: 0.01
Min. Tracking Elev. [deg]: 10
Laser Polarization @emitter: N.A.
Operation
Months per Year : 12
Days per Week : 7
Hours per Day : 6 - 12
Staff per Shift : 2
System Shared With : NO
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 :
Date Last Applicable :
Additional Information :
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8. Calibration
8.01 Calibration Type : PRE+POST
Target Location : INTERNAL
Target Type : FLAT SURFACE
Target Structure :
Number of Targets : 1
Target Distance(s) [m]: 3.088
Date Measured : 2024-10-17
Accuracy [mm]: 30
Verification :
Return-Rate Controlled :
Eye-Safe Method :
Additional Information :
Mode of Operation : SINGLE/MULTI PHOTON
Calibration performed : HOUR
Single Shot RMS [mm]: 10
Edit Criterion 1st Chain : ITERATIVE 2.2 SIGMA
Edit Criterion 2nd Chain : N.A.
Application of Cal Data :
Date Installed :
Date Removed :
Additional Information :
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9. Time and Frequency Standards
9.01.01 Frequency Standard Type : Oven Controlled Crystal Oscillator
Model : DNTS-9S
Manufacturer :
Short Term Stab. [e-12]: 1
Long Term Stab. [e-12]: 5
Time Reference : GPS+GLONASS
Synchronization : GNSS
Epoch Accuracy [ns]: 20
Date Installed : 2024-08-29
Date Removed :
Additional Information :
9.02.01 GNSS Timing Rcvr Model : DNTS-9S
Manufacturer :
Date Installed : 2024-08-29
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 : CPF+POLYNAMIAL
Return-Rate Rejection : N.A.
Edit Criterion 1st Chain : 2.2 SIGMA
Edit Criterion 2nd Chain : N.A.
Upload interval : DAILY
Date First Applicable :
Date Last Applicable :
Additional Information :
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11. Aircraft Detection
11.01 Detection Type : ADS-B
Manufacturer/Provider :
Automatic Laser Shutoff :
Alarms Recorded :
Hazard Distance [km]:
Date Installed : 2024-08-29
Date Removed :
Additional Information :
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12. Meteorological Instrumentation
12.01.01 Pressure Sensor Model : PC-5
Manufacturer : China
Recording Interval : 2 min
Accuracy [mbar]: 0.3
Height Diff to SRP [m]: 4
Distance from SRP [m]: 7
Date Installed : 2024-09-13 02:00 UT
Calibration Interval :
Date Removed :
Additional Information :
12.02.01 Temp Sensor Model : PC-5
Manufacturer : China
Recording Interval : 2 min
Accuracy [deg C]: 0.1
Date Installed :
Calibration Interval :
Date Removed :
Additional Information :
12.03.01 Humidity Sensor Model : PC-5
Manufacturer : China
Recording Interval : 2 min
Accuracy [% rel h]: 2
Date Installed :
Calibration Interval :
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 : 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 : NO
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 :
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 : National Time
Mailing Address : Shuyuan East Road No.3, Lintong,Xi`an,
Website : http://www.ntsc.ac.cn/
Primary Contact
Contact Name : Yang Xuhai
Telephone (primary) : +86-029-83890424
Telephone (secondary) :
Fax : +86-029-83890196
E-mail : yyang@ntsc.ac.cn
Secondary Contact
Contact Name : Li Weichao
Telephone (primary) : +86-029-83893326
Telephone (secondary) :
Fax : +86-029-83890196
E-mail : liwc@ntsc.ac.cn
Tertiary Contact
Contact Name : Wang Xiao
Telephone (primary) : +86-029-83893326
Telephone (secondary) :
Fax : +86-029-83890196
E-mail : wangxiao@ntsc.ac.cn
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 : http://www.ntsc.ac.cn/
Hardcopy on File
Site Map : NO
Site Diagram : NO
Horizon Mask : NO
Monument Description : NO
Site Pictures : NO
Additional Information :
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Xian: Meteorological data
Note: For a larger view, please select a thumbnail.
| Type | Since 2012 | Monthly Average Offset |
|---|---|---|
| Temperature |  |
 |
Humidity |  |
 |
| Pressure |  |
 |
Xian: 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 |
 |
 |
Xian: 7-day tracking information
Click on a plot to view a larger image.
| Days ago | |
|---|---|
| 1 |  |
| 2 |  |
| 3 |  |
| 4 |  |
| 5 |  |
| 6 |  |
| 7 |  |
Xian: 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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