Today, the National Space Administration stated that my country's high-resolution earth observation system Gaofen-7 satellite was officially put into use. As China’s first civil sub-meter optical transmission type 3D surveying and mapping satellite, the launch of this satellite marks the formation of the space-based earth-based observation capabilities of high spatial resolution, high temporal resolution, and high-precision observation created by Gaofen Special Project. It will further meet the data needs of users in basic surveying and mapping, global geographic information assurance, urban and rural construction monitoring and evaluation, and agricultural survey statistics.
The Gaofen-7 satellite was successfully launched on November 3, 2019. The satellite is equipped with payloads such as dual-line array stereo cameras and laser altimeters. It breaks through sub-meter stereo mapping camera technology and can obtain high spatial resolution optical stereo Observation data and high-precision laser altimetry data. Unlike other Gaofen family satellites, the "dual line array camera" carried by Gaofen-7 can capture "3D images." Not only can you see the color and size of the ground objects, but you can also see the height, and the ground object data information is richer.
The Gaofen-7 satellite has realized the 1:10000 scale satellite stereo surveying for civil use, which has greatly improved the level of satellite earth observation and stereo surveying and mapping in my country. Gaofen-7 can not only meet the relevant data needs of domestic users, but also provide powerful spatial information support for countries along the “Belt and Road”, which is of great significance to serve economic and social development and enhance my country's aerospace international influence.
It is understood that during the in-orbit test of the Gaofen-7 satellite, a series of functions such as land illegal supervision, basic feature element identification, crop planting area measurement, and highway construction monitoring were verified. In order to help the Mount Everest elevation survey in May this year, the National Land Satellite Remote Sensing Application Center of the Ministry of Natural Resources used satellites such as Gaofen 7 and Zi Zi 3 to obtain remote sensing images and drew a 1:10000 scale topographic map for the climbing team to successfully climb the summit. A terrain reference is provided. In the next stage, satellites will carry out further research and applications in global geographic information acquisition and autonomous data provision.
The Gaofen special project is one of the 16 major special projects in my country. Since its approval in 2010, it has successfully launched seven satellites including Gaofen-1 to Gaofen-7. The wide application of high-resolution satellites has become an important data and technical support in various fields and departments of the national economy.
(CCTV reporter Xu Jing, National Space Administration Li Chen)