Upgrading Plans of the Upgrading Plans of the Chinese SLR NetworkChinese SLR Network

Yang FuMin(1), Wu Bin(1), Zhang ZhongPing(1), Guo TangYong(2), Yang FuMin(1), Wu Bin(1), Zhang ZhongPing(1), Guo TangYong(2),

Zhao You(3), Qu Feng(4) and Xiong YaoHeng(5)Zhao You(3), Qu Feng(4) and Xiong YaoHeng(5)

1. Shanghai Observatory, Chinese Academy of Sciences, Shanghai1. Shanghai Observatory, Chinese Academy of Sciences, Shanghai2. Institute of Seismology, China Earthquake Administration, Wuhan2. Institute of Seismology, China Earthquake Administration, Wuhan3. Changchun Observatory, Chinese Academy of Sciences, Changchun3. Changchun Observatory, Chinese Academy of Sciences, Changchun4. Chinese Academy of Surveying and Mapping, Beijing4. Chinese Academy of Surveying and Mapping, Beijing5. Yunnan Observatory, Chinese Academy of Sciences, Kunming5. Yunnan Observatory, Chinese Academy of Sciences, Kunming

History of the ProjectHistory of the Project Period of the Project of Crustal Movement Period of the Project of Crustal Movement

Observation Network of China (CMONOC) : Observation Network of China (CMONOC) :

1997-20001997-2000

Main techniques of the project: Main techniques of the project:

Main technology: GPS Network Main technology: GPS Network

Other technologies: VLBI, SLR Gravity, Leveling Other technologies: VLBI, SLR Gravity, Leveling

Improvements of Chinese SLR Network during the Improvements of Chinese SLR Network during the

project:project:

Precision: Single shot from 3-6cm upgraded to 1.5-3cm Precision: Single shot from 3-6cm upgraded to 1.5-3cm

Stability: from 3-5cm upgraded to 1.5-3cmStability: from 3-5cm upgraded to 1.5-3cm

The second stage of the Project:The second stage of the Project:

Period: 2008--2011

The same technologies with the first stage

More core GPS stations (from 25 increase

to 260)

Precision: Precision: single shot (rms) single shot (rms) <10mm for Starlette, …<10mm for Starlette, …

<15mm for Lageos<15mm for Lageos

normal point (rms) 3-5mm for Lageosnormal point (rms) 3-5mm for Lageos

Stability: Stability: 10-15mm 10-15mm

Ranging capability:Ranging capability: >25000Km (Compass, >25000Km (Compass,

Galileo, GPS, …)Galileo, GPS, …)

Daylight tracking capability: Daylight tracking capability: All stationsAll stations

Goals of the Upgrading of SLRGoals of the Upgrading of SLR

Main Technical UpgradingMain Technical Upgrading

New lasers New lasers

kHz diode pumping lasers (10ps pulse width, 1 KHz repetition)

for Shanghai, Changchun, Beijing, Wuhan and TROS-2

Candidates: Photonics (US), HighQ Laser (Austria ), China …

Kunming to be determined

Due to T/R with the same telescope (1.2 meter)

Event timer – for all stationsEvent timer – for all stations Timing accuracy: 10ps Timing repetition: >1kHz

Daylight tracking package – for all stationsDaylight tracking package – for all stations Made by ourselves

kHz ranging controller – for all stationskHz ranging controller – for all stations Made by ourselves

TROS-1TROS-1

The TROS-1 now is in KASI, Daejeon, Korea in The TROS-1 now is in KASI, Daejeon, Korea in

August 2008.August 2008.

The details of TROS-1 observations in KASI will be The details of TROS-1 observations in KASI will be

presented by Dr. Lim of KASI on this Workshop.presented by Dr. Lim of KASI on this Workshop.

The TROS-1 system will not be included in the The TROS-1 system will not be included in the

upgrading plan of the CMONOC.upgrading plan of the CMONOC.

Situation of Mobile SLR Station

TROS-2TROS-2 In the project of the second stage of CMONOC, a new In the project of the second stage of CMONOC, a new

powerful mobile SLR system, TROS-2, will be made powerful mobile SLR system, TROS-2, will be made by 2011. The Institute of Seismology in Wuhan is in by 2011. The Institute of Seismology in Wuhan is in charge to develop the system.charge to develop the system.

The main parameters of TROS-2 will be:The main parameters of TROS-2 will be: 80 cm aperture telescope80 cm aperture telescope kHz laserkHz laser C-SPAD receiverC-SPAD receiver Event timerEvent timer

The capability of TROS-2 mobile SLR system will be:The capability of TROS-2 mobile SLR system will be: GEO tracking GEO tracking Sub-cm range precisionSub-cm range precision Daylight tracking routinelyDaylight tracking routinely

A new fixed SLR system supported by Chinese A new fixed SLR system supported by Chinese

Academy of Sciences will be installed in Urumqi Academy of Sciences will be installed in Urumqi

station by 2010. Shanghai Observatory is in charge to station by 2010. Shanghai Observatory is in charge to

develop the system.develop the system.

The station will be located at Nanshan, 60 km away in The station will be located at Nanshan, 60 km away in

the south of Urumqi city, above sea level 2000m. The the south of Urumqi city, above sea level 2000m. The

weather condition is excellent. weather condition is excellent.

The location of the station is of importance both in The location of the station is of importance both in

Chinese and global network. Chinese and global network.

There are a VLBI system and a GPS station already, There are a VLBI system and a GPS station already,

so the station will be a multi-technique collocation site.so the station will be a multi-technique collocation site.

A new fixed SLR station in Urumqi by 2010

SLR / VLBI Stations in China

The main parameters of the new SLR system will be:The main parameters of the new SLR system will be:

1 meter aperture telescope

kHz laser

C-SPAD receiver

Event timer

The capability of the new system in Urumqi will be:The capability of the new system in Urumqi will be:

GEO tracking

Sub-cm range precision

Daylight tracking routinely

San Juan SLR Station

San Juan SLR Station

ILRS ID7406

Cooperation between the National University of San Juan and the National Astronomical Observatory of China (NAOC)

Operational since Feb. of 2006 with excellent productivity, but the precision and stability are to be upgraded.

The upgrading proposal for the San Juan SLR system is The upgrading proposal for the San Juan SLR system is

under serious consideration by the Ministry of Science under serious consideration by the Ministry of Science

and Technology of China.and Technology of China.

The main upgrading:The main upgrading:

kHz ranging

Event timer

Daylight tracking

Sub-cm range precision

Summary

Under the support of the National Project “CMONOC”, the Chinese SLR network will be upgraded in two years

1 fixed station in Urumqi and 1 mobile system will be added into the CSN

All systems will go to kHz ranging and daylight tracking, the performance of the CSN will be great upgraded

San Juan station will get the funding for same upgrading soon.

Thank you !Thank you !