# HJ-2B (Huan Jing-2B)
*missions*

## Specifications
- **operator**: cresda
- **actual launch**: 2020-09-27
- **current status**: operational
- **orbit type**: Sun-synchronous orbit, 650 km altitude, 10:30 descending equator crossing
- **revisit days**: 31
- **tasking supported**: false
- **current geographic priority**: Disaster, environment, land, vegetation, and coastal or inland-water monitoring.
- **launch vehicle**: casc-long-march-4b
- **entity type**: mission
- **last verified date**: 2026-06-14
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: cresda
- **attributes**: {"operator":"cresda","actual_launch":"2020-09-27","current_status":"operational","orbit_type":"Sun-synchronous orbit, 650 km altitude, 10:30 descending equator crossing","revisit_days":31,"tasking_supported":false,"current_geographic_priority":"Disaster, environment, land, vegetation, and coastal or inland-water monitoring.","launch_vehicle":"casc-long-march-4b"}
- **relevance**: in-scope

## Editorial
HJ-2B (Huan Jing-2B) is a Chinese environmental monitoring satellite operated by CRESDA, co-launched with HJ-2A on 2020-09-27 from Taiyuan. It flies in a sun-synchronous orbit at 650 km altitude, 97.9 degree inclination, with a 10:30 descending local solar time crossing and a 31-day repeat cycle.[^wmo-hj2b][^ceos-hj2b]

HJ-2B carries three remote-sensing instruments: the Wide-Band Visible Camera 2 (WVC-2) for multispectral land, vegetation, and coastal observation; the Infrared Multispectral Scanner 2 (IRMSS-2) for thermal infrared land-surface temperature retrieval and fire detection; and the Hyperspectral Imager 2 (HSI-2) for detailed spectral classification of land cover, crops, coastal water quality, and marine primary production.[^wmo-wvc2][^wmo-irmss2][^wmo-hsi2]

WMO OSCAR records HJ-2B as operational as of February 2026. CEOS listed a projected end-of-life of December 2025, while the WMO record indicates operational status at least into 2026. Data are distributed by CRESDA.[^wmo-hj2b][^ceos-hj2b]

## Compositional position
- HJ-2B (Huan Jing-2B) --[mission_payloads]--> wvc-2 (products)
- HJ-2B (Huan Jing-2B) --[mission_payloads]--> irmss-2 (products)
- HJ-2B (Huan Jing-2B) --[mission_payloads]--> hsi-2 (products)
- HJ-2B (Huan Jing-2B) --[related-topic]--> land-cover-change (topics)
- HJ-2B (Huan Jing-2B) --[related-topic]--> disaster-damage-assessment (topics)
- HJ-2B (Huan Jing-2B) --[related-topic]--> crop-stress (topics)
- HJ-2B (Huan Jing-2B) --[related-topic]--> coastal-water-quality (topics)
- HJ-2B (Huan Jing-2B) --[related-topic]--> marine-primary-production (topics)

## Sources
- [ceos-hj2b] | CEOS MIM mission summary: HJ-2B | https://database.eohandbook.com/database/missionsummary.aspx?missionID=948 | tier=agency-doc | accessed=2026-06-14
- [wmo-hj2b] | WMO OSCAR satellite record: HJ-2B | https://space.oscar.wmo.int/satellites/view/hj_2b | tier=agency-doc | accessed=2026-06-14
- [wmo-wvc2] | WMO OSCAR instrument record: WVC-2 | https://space.oscar.wmo.int/instruments/view/wvc_2 | tier=agency-doc | accessed=2026-06-14
- [wmo-hsi2] | WMO OSCAR instrument record: HSI-2 | https://space.oscar.wmo.int/instruments/view/hsi_2 | tier=agency-doc | accessed=2026-06-14
- [wmo-irmss2] | WMO OSCAR instrument record: IRMSS-2 | https://space.oscar.wmo.int/instruments/view/irmss_2 | tier=agency-doc | accessed=2026-06-14

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Source: https://eo-atlas.org/missions/hj-2b
Maintainer: SpectraWorks B.V. (CC-BY 4.0)