To improve the global coverage of the satellite tracking stations the Western Pacific Satellite Laser Ranging SLR Network was founded in 1994. The main chain includes SLR stations Komsomolsk on Amur, Russia, Chang Chun and Shanghai in China, Tokyo area in Japan and Mount Stromlo (previously Orroral) in Australia. The requirements on the SLR systems are tough: the range to the satellites in the orbit up to 20000 km high must be determined with the millimetre precision, the high system stability and productivity is obligatory. To meet these requirements the measurement techniques and devices have to be developed at CTU and implemented to most of these SLR stations. The Single Photon Avalanche Diode detector package permitted to register individual photons reflected from satellites with picosecond resolution. The Portable Calibration Standard device installed at the SLR station in ChangChun, China, enabled to improve the system calibration to the desired millimetre level. The new satellite laser ranging data processing algorithms being developed will guarantee the high data quality.
Under the roof of a joint Czech Chinese project the Portable Calibration Standard technique will be implemented in SLR station in Shanghai together with the development of new system calibration and data processing schemes.
The unique low dispersion Westpack satellite was developed in Australia and launched from Russia in 1998. The overall single photon ranging precision of 3 millimetres has been reached routinely.