mardi 19 août 2014

CNSA Long March 4B launches Gaofen-2 and BRITE-PL-2

CNSA - China National Space Administration logo.

Aug. 19, 2014

China’s back to launch action with the Tuesday launch of a new high-resolution observation satellite. The Gaofen-2 (GF-2) was launched at 03:15 UTC by a Long March-4B (Chang Zheng-4B) rocket from the LC9 launch complex of the Taiyuan Satellite Launch Center. Also on board was the Polish satellite BRITE-PL-2, also known as “Heweliusz”.

Long March-4B (Chang Zheng-4B) rocket launch

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.

Gaofen satellite series

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.

The BRITE-Poland satellites:

The first scientific satellites to explore the stars that are brighter and hotter than the Sun were developed in Poland during between 2010 and 2012. The project will will be helpful in understanding the internal structure of the biggest stars in our galaxy.

Star oscillation will be investigated with the help of BRITE satellite constellations, designed within the Bright Target Explorer (BRITE) project and developed as the Canadian-Austrian-Polish cooperation.

The satellites will be taking images of the sky with a wide-field camera in order to precisely measure the brightness of the brightest stars.

Polish satellite BRITE-PL-2, also known as “Heweliusz”

Measuring these stars precisely from the Earth’s surface proves to be a difficult task, even though they are easily detectable during a cloudless night. A few hundred (500-800) stars of the Milky Way will be observed during the experiment.

Polish scientists intend to investigate the mechanism of convection, which is the transportation of energy that takes place in the hottest stars. This is an important occurrence in nature that physicists have known for over 100 years, however it does not yet have a mathematical description. The BRITE project will help explain the phenomenon.

For more information about China National Space Administration (CNSA), visit:

Images, Video, Text, Credits: CNSA / NASA, Rui C. Barbosa / Gunter Space Page.