CHINASE | ENGLISH
CZ-2D successfully launched the hyper-spectral integrated observation satellite
At 2:31 on December 9, 2022, CZ-2D Y-45 launch vehicle sent the hyper-spectral integrated observation satellite to the target orbit successfully at Taiyuan Satellite Launch Center. The launch task was a complete success. Both the satellite and the launch vehicle are developed by Shanghai Academy of Spaceflight Technology.
CZ-2D launch vehicle: Getting prepared to face the low temperature challenge
CZ-2D launch vehicle is a normal-temperature liquid two-stage launch vehicle. It is characterized by “high reliability, good economic efficiency, and strong adaptability”, and supports the launch of a single satellite, multiple satellites connected in parallel or series, and carried satellites. Its carrying capacity in the sun-synchronous circular orbit can reach 1.3 tons (with an orbital height of 700 km).
Owing to the temporary adjustment to the launch task, after entering the site, the launch vehicle test team was faced with the long-term storage of the model at the launch site. The model team cooperated with the launch site and established a proper plan for long-term storage at the launch site according to the technical requirements for launch vehicle preservation by reference to the invaluable experience of the long-term storage of other models. It monitored the environmental temperature and humidity and storage pressure of the launch vehicle every day, and sent critical products back to Shanghai for inspection again. Before returning to the launch site again, the team checked and confirmed the storage and re-inspection condition of the product carefully. Shanghai Academy of Spaceflight Technology also organized experts to review the results to ensure the successful implementation of the task.
The cold current made the launch even harder. CZ-2D development team adopted response measures such as adding an insulation layer to the engine compartment, air-conditioning ventilator, and warming the vernier rocket engine. In addition to these, it also identified weak points in advance to make corresponding plans and all-round preparations.
Hyper-spectral integrated observation satellite: Ranking the 1st in various aspects at home and abroad
This launch task is the 71st launch task of CZ-2D launch vehicle, the 177th flight test of Long March launch vehicles developed by Shanghai Academy of Spaceflight Technology, and the 453rd launch task of Long March launch vehicles.
The hyper-spectral integrated observation satellite launched this time is an important part of the space-based system of the High-resolution Earth Observation System, and a sign of the hyper-spectral observation ability of the High-resolution Earth Observation System. It will further improve the self-sufficiency of hyper-spectral remote sensing data in China. It will mainly be used for pollution reduction, environmental quality supervision, atmospheric composition monitoring, natural resources investigation, and climate change research. Under the firm leadership of two chief engineers of the model team, the satellite development team completed the flight model at a time within the 18-month development period with firm conviction, and completed the launch task successfully.
After the hyper-spectral integrated observation satellite is successfully launched, it will have the large-width medium-high spatial resolution long-wave infrared detection ability with the best overall performance in the world, the visible short-wave broad-spectrum large-width hyper-spectral imaging ability with the best imaging spectral resolution in China, and the pollution gas hyper-spectral detection ability with the best spatial resolution in China, and will also realize the first in-orbit triaxial mobile calibration to the moon in China.
The large-width medium-high spatial resolution long-wave infrared detection ability with the best overall performance in the world. The wide-width thermal infrared imager carried by the satellite has an observation width of 1,500 km. Compared with Landsat of the United States with the same resolution, its observation width is 7 times higher, and its number of thermal infrared observation channels is doubled. It can also play back the high-precision global surface temperature information.
The visible short-wave broad-spectrum large-width hyper-spectral imaging ability with the best imaging spectral resolution in China. The visible short-wave infrared hyper-spectral camera carried by the satellite has a maximum spectral resolution of 2.5 nm, which can obtain finer spectral data and considerably improve China’s ability for monitoring greenhouse gas emissions such as methane, water pollution monitoring, and exploration of minerals and oil and gas resources.
The pollution gas hyper-spectral detection ability with the best spatial resolution in China. The differential absorption spectrometer for atmospheric trace gases carried by the satellite has a spatial resolution of 24×13 km and a spectral resolution of 0.3-0.6 nm, which can realize the observation of pollution gases such as ozone, nitrogen dioxide, and sulfur dioxide.
In order to further improve the calibration accuracy of the visible short-wave infrared hyper-spectral camera, the satellite will realize the first in-orbit triaxial mobile calibration to the moon in China.
The satellite will be networked with the hyper-spectral observation satellite and the satellite for atmospheric environmental monitoring to achieve the atmospheric environment detection around the globe three times a day, the infrared remote sensing around the globe once a day, and the hyper-spectral and full-spectrum revisits and observations of China and offshore areas within 3 days to meet the industrial needs. After the satellite is put into service, it will be used for dynamic monitoring of the ecological environment, investigation of natural resources, and detection of atmospheric composition. It will greatly improve the global air pollutant monitoring ability, significantly improve China’s regional macro-monitoring ability for greenhouse gas (e.g. methane) and water pollution emission points and sources, provide powerful support to the integrated air pollution control, and advance the fight to prevent and control pollution as well as our action for the conservation and restoration of national key ecosystems, response to global climate change, and the building of a Beautiful China.