Brief introduction of Tianhua series satellites

Tianhui-1 is the first generation transmission stereo mapping satellite in China, which is mainly used for scientific experiments in scientific research, land and resources investigation, map mapping and other fields.

Tianhui-1 was developed by Aerospace Dongfanghong Satellite Co., Ltd., and adopted CAST2000 satellite platform, which integrated three types and five kinds of camera loads: three-line CCD camera, two-meter high-resolution panchromatic camera and multi-spectral camera. It was the high-resolution remote sensing satellite with the highest payload ratio in China at that time.

Tianhui-1 has realized the leap-forward development of China's surveying and mapping satellite from the return film type to the CCD transmission type, and for the first time in China, it has achieved the same technical level of relative accuracy as the American SRTM 12m/6m (plane/elevation 1σ) without ground control points.

Tianhui No.1 has also formed the first domestic ground application system with completely independent property rights and localization, which integrates data reception, transportation control management, product production and application services. Tianhui-1 0 1, 02 and 03 satellites were successfully launched on August 24th, 20th12nd, May 6th, 20th15th, and10th respectively, and they were networked and operated.

Functional density

Tianhui-1 satellite is equipped with 5 cameras and 4 cameras, * *16 CCD, 19 independent image information source; Equipped with three star sensors and two measuring GPS receivers (cold backup for each other), it was the most complex small satellite with the highest functional density in China at that time. Payload accounts for about 50% of the satellite's dry weight.

On a small satellite of 1 1000kg, three panchromatic mapping cameras with 5m resolution, a 4-band multispectral camera with1/0m resolution and a panchromatic high-resolution camera with 1 2m resolution are integrated.

Not only can three-dimensional geographic information be obtained, the global photogrammetry control network be established, and the target mapping system with the scale of1:50,000 can be realized, but also four-band multi-spectral images of blue, green, red and near infrared can be obtained, and the physical properties of ground objects can be quantitatively inverted, thus improving the present situation of the mapping system.

At the same time, through the fusion of multi-spectral images and panchromatic images, color orthophoto products can be generated. It can also obtain panchromatic ground object images with a resolution of 2m, improve the integrity of map information, enhance the detailed, rapid and accurate interpretation ability of ground object targets, and cooperate with the completion of the mapping of1:50,000 scale map and the revision of1:250,000 scale map.

Reference to the above content: Baidu Encyclopedia-Tianhui No.1