Sunday, June 28, 2015

China Launches Gaofen-8 Earth-observing Satellite

Long March 4B rocket launches Gaofen-8 satellite on June 26, 2015. Photo Credit: Xinhua

China conducted Friday a surprise launch, sending to space a high-resolution Earth-imaging satellite Gaofen-8 on a Long March 4B rocket. The launch took place at 2:22 a.m. EDT (6:22 UTC) from the LC9 launch complex at the Taiyuan Satellite Launch Center in northern China’s Shanxi province. According to Chinese officials, Gaofen-8 is part of a civilian program and will provide general land surveys, disaster response, agriculture mapping, city planning, land ownership marking and road network planning. “Gao fen” means “high resolution” in English.

The major users of the observation data will be the Ministry of Land and Resources, Ministry of Environmental Protection, and the Ministry of Agriculture.

Friday’s launch was out of sequence as only two Gaofen satellites have been launched to date, in April 2013 and August 2014, for the China High-Resolution Earth Observation System CHEOS.

Gaofen-8 was put into a 291 mile (469 km) × 299 mile (481 km), 97.3° orbit, similar to the Yaogan 14 satellite.

Friday’s launch was not officially announced in advance. Notices to pilots released Thursday gave the first warning of the upcoming launch. NOTAMs (Notices to Airmen) were published identifying two temporarily restricted areas matching up with a polar launch from the Taiyuan Satellite Launch Center, taking the rocket to the south-west toward a high-inclination orbit.

The CHEOS program comprises the elements of the spaceborne system, the near-space system, aerial system, the ground system and application system as a whole to realize Earth observation at high temporal, spatial and spectral resolution.

The next satellite in the program, Gaofen-3, is planned to be launched in 2015. Gaofen-4 launched is scheduled for 2015/2016. The entire CHEOS series of satellites will be in orbit by 2020.

Payloads flown on the Gaofen satellites include optical, infrared and microwave imagers, spectrometers and specialized sensors.

CHEOS satellites will be operated in different orbits including Low Earth Orbit (LEO) and Geostationary Orbit (GEO) to create a range of data products at different qualities and revisit times.

The June 26 lift-off was the second Chinese launch in 2015. China plans two more space launches this year.

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