On July 3, 2020, the CZ-4B carrier rocket blasted off from the Taiyuan Satellite Launch Center, successfully putting the high-resolution multi-mode integrated imaging satellite and the science popularization satellite Xibaipo (Bayi 02) into the scheduled orbit and the launch was a complete success.

The CZ-4B carrier rocket for this launch mission is a normal temperature liquid three-stage carrier rocket developed by Shanghai Academy of Spaceflight Technology. It has the capability of launching multiple satellites and single and multiple satellites with different orbit requirements. Its solar synchronous circular orbit carrying capacity can reach 2.5 tons (orbit altitude is 700 km).

This launch mission is the first show of the 2020 CZ-4 series of launch vehicles, and also kicked off the launch of the high-density launch of this series of rockets this year. For this mission, the newly developed four-point connection unlocking device was used for the first time, and the precise landing zone control technology was used to change the location of the original second sub stage landing zone.

In order to meet the requirements of the new platform interface of the main satellite, Shanghai Academy of Spaceflight Technology has developed for three years and tailored the four-point connection unlocking device for the first flight. The separation device has undergone three rounds of design optimization iterations and more than 100 development tests. It provides powerful support to the satellite and a low-impact environment during separation by means of low impact, high reliability, high strength and light weight. This product has the advantages of "small impact, light weight, and wide adaptability" compared to the previous belting-connected unlocking device.

The precise landing zone control adopted for this mission uses the yaw maneuver method to change the direction of the rocket's flight segments at all levels, which greatly solves the problem of landing zone safety.

The main satellite of this launch is a high-resolution multi-mode integrated imaging satellite, which was developed by China Academy of Space Technology. It will be mainly used to obtain high-resolution images of our country's land and surrounding areas, mainly serving industries such as natural resources, disaster reduction and emergency response, agriculture and rural areas, ecological environment, housing construction, forestry and grassland.

At the same time, it is equipped with a science popularization satellite "Xibaipo" (Bayi 02), which mainly carries out teaching demonstrations and technical experiments such as ground remote sensing imaging, image voice data transmission, and orbit programming.

△The badge produced by this launch test team

This launch is the 337th launch of the CZ series of launch vehicles and the 117th flight test of the CZ series of launch vehicles developed by Shanghai Academy of Spaceflight Technology.