EO·Atlas
HY Ultraviolet Imaging and Calibration Sensor
Compiled from public sources on 2026-06-16. Not independently verified by China Academy of Space Technology.
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Ultraviolet imaging and calibration sensor flown on HY-1D.
The HY Ultraviolet Imaging and Calibration Sensor (UVI) is a passive UV-A instrument flown on the HY-1D ocean colour satellite.[1] It carries two UV-A spectral bands centred at approximately 355 nm (345-365 nm range) and 385 nm (375-395 nm range), each with approximately 20 nm bandwidth.[1] Spatial resolution and swath parameters are not publicly disclosed by the operator.[1][2] The UVI serves two documented functions in the HY-1D payload complement: providing atmospheric correction inputs for turbid coastal water colour retrieval, and supporting vicarious calibration of the co-flown Chinese Ocean Colour and Temperature Scanner (COCTS).[3][1] Vicarious calibration using the UVI has been validated against in-situ measurements for ocean colour retrieval on the HY-1C mission.[3]
Compositional position
- Ocean colour / water-leaving radiancevia HY-1D
UVI provides UV-A radiance at 355nm and 385nm used for vicarious calibration of COCTS ocean colour products and atmospheric correction of turbid coastal waters; demonstrated operationally on HY-1D
- Cross-sensor harmonization and calibration transfervia HY-1D
UVI co-calibrates with SCS (Satellite Calibration Spectrometer) on the same platform and provides inter-mission harmonisation reference at UV-A wavelengths; used in vicarious calibration studies for HY-1C/1D COCTS
None on record.
- [1]HY-1C/1D mission page, eoPortaloperator engineering2026-06-16
- [2]WMO OSCAR satellite record: HY-1Dcommunity2026-06-16
- [3]WMO OSCAR satellite record: HY-1Ccommunity2026-06-16
- [4]System vicarious calibration and ocean color retrieval from the HY-1C UVI, ScienceDirect 2025peer reviewed2026-06-16
- [5]Haiyang (satellite), Wikipediacommunity2026-06-16