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Atmospheric environmental load of the "High Score V" satellite passed the on-orbit test review
On the morning of December 21st, the core payloads developed by the Anhui Institute of Optics and Fine Mechanics and the Hefei Institutes of Physical Science, part of the Chinese Academy of Sciences, successfully passed the in-orbit test summary review organized by the Environmental Satellite Project Office of the 8th Research Institute of China Aerospace Science and Technology Corporation. These payloads—namely the Differential Absorption Spectrometer (EMI) for atmospheric trace gases, the Atmospheric Major Greenhouse Gas Monitor (GMI), and the Atmospheric Aerosol Multi-Angle Polarization Detector (DPC)—were carried aboard the "High Score 5" satellite.
The three instruments were launched on May 9th along with the "High Score 5" satellite and have since achieved successful startup and imaging. The EMI has completed key functions such as nadir observation, quartz and aluminum diffuse reflector calibration, and lamp pixel detection. The GMI has been fully operational, while the DPC has transitioned to its ocean observation mode.
Currently, the EMI is the most spectrally precise instrument in the UV and visible bands within China. It marks the first time that China has obtained global data on atmospheric trace gases like nitrogen dioxide, with results aligning closely with those from international satellites such as OMI. The GMI's greenhouse gas spectral data matches observations from the GOSAT satellite, while the DPC provides multi-spectral and multi-angle polarized images, enabling accurate retrieval of global aerosol products over both land and ocean, as well as cloud phase classification. It is the only operational satellite sensor worldwide that uses polarization techniques for aerosol detection.
In November, the EMI payload played a key role in supporting air quality assurance efforts during the first China International Import Expo. Using satellite remote sensing, it accurately captured the spatial and temporal distribution of pollutants, offering critical scientific support for environmental decisions at the event.
During the review, the testing team conducted over six months of in-orbit tests following the "High Score 5 Satellite Engineering On-Orbit Test Specification." All three payloads met or exceeded technical requirements, with stable performance and reliable data output capable of generating atmospheric-related products. The data has been well received by users.
Looking ahead, these three atmospheric detection instruments will significantly enhance China’s ability to monitor polluted gases, greenhouse gases, and particulate matter. They will play a vital role in environmental protection, monitoring, emergency response, evaluation, and planning, contributing to more effective and accurate satellite-based atmospheric observation systems.