missions

Huan Jing-2A

Huan Jing-2A (HJ-2A) is a Chinese environmental and disaster monitoring satellite operated by CRESDA, co-launched with HJ-2B on 2020-09-27 from Taiyuan. It flies in a sun-synchronous orbit at 650 km altitude with a 10:30 descending local solar time crossing and a 31-day repeat cycle.^[1]^[2]

HJ-2A carries three instruments: the Wide-Band Visible Camera 2 (WVC-2) for multispectral land and vegetation observation; the Infrared Multispectral Scanner 2 (IRMSS-2 HJ) for thermal infrared land-surface temperature and anomaly detection; and the Hyperspectral Imager 2 (HSI-2) for narrowband spectral classification of land cover, vegetation stress, and mineralogy.^[3]^[4]^[5]

WMO OSCAR records HJ-2A as operational as of 2026-02-02. CEOS lists an end-of-life date of December 2025, while the WMO record indicates operational status extending into at least 2026. Data are distributed by CRESDA for land monitoring, disaster response, and environmental surveys.^[1]^[2]

Full specification

All fields

current status	operational
operator	China Center for Resources Satellite Data and Application
launch vehicle	casc-long-march-4b
Launched	2020-09-27
orbit type	Sun-synchronous orbit, 650 km altitude, 10:30 descending equator crossing
revisit days	31
tasking supported	false
current geographic priority	Land observation, environmental monitoring, and disaster monitoring.
Last updated	2026-06-14
claim status	agency-sourced

Where this fits, supply chain

Compositional position

this ——— Wide View CCD camera - 2 payload

this ——— Infrared Multispectral Scanner - 2 payload

this ——— Hyper-Spectral Imager - 2 payload

this ——— Disaster damage assessment related-topic

this ——— Land cover change related-topic

this ——— Wildfire related-topic

Vegetation index mapping → demonstrated Wide View CCD camera - 2

Optical time-series change detection → demonstrated Wide View CCD camera - 2

Land-surface temperature - emissivity retrieval → demonstrated Infrared Multispectral Scanner - 2

Thermal anomaly detection → demonstrated Infrared Multispectral Scanner - 2

Sea-surface temperature retrieval → demonstrated Infrared Multispectral Scanner - 2

Imaging spectroscopy retrieval → demonstrated Hyper-Spectral Imager - 2

Vegetation index mapping → demonstrated Hyper-Spectral Imager - 2

Sources

[1]WMO OSCAR satellite record: HJ-2Aagency doc2026-06-14
[2]CEOS MIM mission summary: HJ-2Aagency doc2026-06-14
[3]CAST optical remote sensing satellites: HJ familyoperator engineering2026-06-14
[4]WMO OSCAR instrument record: WVC-2agency doc2026-06-14
[5]WMO OSCAR instrument record: IRMSS-2 (HJ)agency doc2026-06-14
[6]WMO OSCAR instrument record: HSI-2agency doc2026-06-14

Cite https://eo-atlas.org/missions/hj-2a Markdown twin → Field definitions →