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Tsinghua

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Location: Beijing.

• Tsinghua - . Mass: 50 kg (110 lb). Nation: China. Agency: Tsinghua. Manufacturer: Surrey. Class: Technology. Type: Navigation technology satellite. Spacecraft: SSTL-70. USAF Sat Cat: 26385 . COSPAR: 2000-033B. Apogee: 713 km (443 mi). Perigee: 687 km (427 mi). Inclination: 98.14 deg. Period: 98.68 min.

  Tsinghua University of Beijing satellite equipped with an imager, communications payload, and momentum wheels for 3-axis stabilisation. The 50 kg, 0.69 x 0.36 x 0.36m box-shaped satellite used a standard Surrey SSTL microsat bus.Tsinghua-1 was the first demonstrator for the planned Disaster Monitoring Constellation and carried a multi-spectral Earth imaging camera providing 39-metre nadir ground resolution in 3 spectral bands. The satellite also carried out research in low Earth orbit using digital store-and-forward communications, a digital signal processing (DSP) experiment, a Surrey-built GPS space receiver and a new 3-axis microsat attitude control experiment. Tsinghua-1 used the SGR-10, with 12 channels and equipped with two receive antennas, to investigate the use of GPS signals in microsat on-board attitude and orbit determination. In October 2000 Surrey Satellite Technology Ltd (SSTL) released a picture of Tsinghua-1 taken in orbit by the SNAP-1 6.5 kg nanosatellite.

• HTSTL-1 - . Mass: 50 kg (110 lb). Nation: China. Manufacturer: Tsinghua. Class: Technology. Type: Navigation technology satellite. Spacecraft: HTSTL. First attempted launch of the all-solid-propellant KT-1 launch vehicle. The 50 kg test satellite, built by university students, was to have been placed in a 300 km polar orbit..

• Naxing 1 - . Payload: CAST1000A, OlympivSat. Mass: 25 kg (55 lb). Nation: China. Agency: Tsinghua. Class: Surveillance. Type: Military Radarsat. Spacecraft: CAST1000. USAF Sat Cat: 28221 . COSPAR: 2004-012B. Apogee: 616 km (382 mi). Perigee: 599 km (372 mi). Inclination: 97.70 deg. Period: 96.80 min. Naxing 1 (a contraction of Nami Weixing 'Nanosatellite') was designed for high-tech experiments. The satellite was developed and will be used by the elite Qinghua University and the Aerospace Qinghua Satellite Technologies Co. Ltd..