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Chinese Long March 4B conducts surprise Gaofen-8 launch

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Chinese Long March 4B conducts surprise Gaofen-8 launch

June 26, 2015 by Rui C. Barbosa

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The Chinese have conducted another surprise launch on Friday with the launch of an Earth Observation System satellite called Gaofen-8. The launch took place at 06:22 UTC via the use of a Long March-4B rocket that set sail from the LC9 launch complex at the Taiyuan Satellite Launch Center.

Chinese Launch:

There is very little information about the GF-8 Ganfen-8 satellite orbited on Friday, other than the objectives of the mission – later released to the state media – that it was to provide country surveying, disaster response, agriculture mapping, city planning, land ownership marking and road network planning.

China announced plans for the launch of Gaofen-1 to Gaofen-7, but there was no news about an 8th Gaofen bird:oops:. The only information that can be found is it will be classed as an optical satellite planned under the civilian China High-resolution Earth Observation System (CHEOS).

The Gaofen satellites are a series of high-resolution optical Earth observation satellites of China National Space Administration. In English “gao fen” means “high resolution”.

The civilian High-Definition Earth Observation Satellite program was proposed in 2006, receiving government approval on the next years and initiated in 2010.

The plan was to launch six Gaofen satellites between 2013 and 2016. The first satellite, Gaofen-1, was launched on April 26, 2013, by the Long March-2D (Y18) from the Jiuquan Satellite Launch Center.

The main goal of the Gaofen series is to provide near real-time observations for disaster prevention and relief, climate change monitoring, geographical mapping, environment and resource surveying, as well as for precision agriculture support.

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

In 2010, the Chinese government approved to implement the China High-resolution Earth Observation System (CHEOS), which is an extension of the High-Definition Earth Observation Satellite program. The CHEOS series would consist of seven optical/microwave satellites.

The Earth Observation System and Data Center of the China National Space Administration is responsible for organizing the construction of the CHEOS program.

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 implementation plan of CHEOS satellite series has a development period between 2010 and 2020. With the launch of GF-2 in 2014, by 2016 the next three satellites will be launched. The entire CHEOS series of satellites will be in orbit by 2020.

Chinese Long March 4B conducts surprise Gaofen-8 launch | NASASpaceFlight.com
 
Gao Fen 1 to 5:

GF-1 employs the CAST-2000 bus, it is configured with two 2 m Pan/8 m MS camera and a four 16 m MS medium-resolution and wide-field camera set. GF-1 realizes an integration of imaging capacity at medium and high spatial resolution and with a wide swath, the design life is 5 years with a goal of 8 years.

GF-2 employs the CS-L3000A bus, it is configured with one 1 m Pan/4 m MS camera, the design life is >5 years. GF-2 was launched on August 19, 2014 on a Long March-4B vehicle from TSLC (Taiyuan Satellite Launch Center), China.

GF-3 employs the CS-L3000B bus, it is configured with a multi-polarized C-band SAR (Synthetic Aperture Radar) instrument at meter-level resolution, the design life is 8 years. GF-3 is scheduled for completion of development and construction in 2015.

GF-4 employs the GEO remote sensing bus,configured with a 50 m staring camera, operating from GEO (Geostationary Earth Orbit). GF-4 will provide an imaging area of 7000 km x7000 km with individual scene coverage (scenes of 400 km x 400 km), and with a capacity for high temporal resolution remote sensing monitor at minute-level. GF-4 has a design life of 8 years. GF-4 is currently well under development and construction and is scheduled to launch in 2015.

GF-5 employs the SAST-5000B bus [Note: SAST (Shanghai Academy of Spaceflight Technology)],configured with six payloads, including a VIS and SWIR (Shortwave Infrared) hyperspectral camera, spectral imager, greenhouse gas detector, atmospheric environment infrared detector at very high spectral resolution, differential absorption spectrometer for atmospheric trace gas, and a multi-angle polarization detector. GF-5 has a design life of 8 years and is scheduled to launch in 2016.

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Fused image of the Beijing Forbidden City with 2 m and 8 m resolution data of GF-1 (image credit: DFH)

Gaofen-1 - Satellite Missions - eoPortal Directory
 
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