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Atmospheric environmental load of the "High Score V" satellite passed the on-orbit test review
On 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 review for the "High Score 5" satellite. The three instruments—Atmospheric Trace Gas Differential Absorption Spectrometer (EMI), Atmospheric Major Greenhouse Gas Monitor (GMI), and Atmospheric Aerosol Multi-Angle Polarization Detector (DPC)—were reviewed by the Environmental Satellite Project Office of the 8th Research Institute of China Aerospace Science and Technology Corporation.
These payloads were launched on May 9th aboard the "High Score 5" satellite and have since completed their initial imaging operations. The EMI has successfully executed nadir observation, quartz and aluminum diffuse reflector calibration, and lamp pixel detection. The GMI has been fully operational, while the DPC has transitioned to ocean mode, demonstrating its versatility and performance.
Currently, the EMI is the highest-resolution UV-visible spectrometer in China, capable of mapping global nitrogen dioxide distribution with accuracy comparable to international satellites like OMI. The GMI's greenhouse gas data aligns with observations from the Japanese GOSAT satellite. Meanwhile, the DPC, the only operational satellite sensor using polarization techniques for aerosol detection, provides multi-spectral and multi-angle polarized images, enabling accurate retrieval of aerosol properties over both land and ocean, as well as cloud phase classification.
In November, the EMI played a key role in supporting air quality monitoring during the first China International Import Expo, offering real-time data on pollutant distribution. This contributed significantly to environmental decision-making and ensured a clean atmosphere for the event.
During the six-month on-orbit testing period, all three instruments met or exceeded the technical requirements outlined in the "High Score 5 Satellite Engineering On-Orbit Test Specification." Their stable performance and high-quality data have been well-received by users, proving their value in atmospheric monitoring.
Looking ahead, these three instruments will enhance China’s ability to monitor atmospheric pollutants, greenhouse gases, and particulate matter. They will play a vital role in environmental protection, monitoring, emergency response, evaluation, and planning, contributing to better air quality and a healthier planet.