BackForward Satellite: HY-4A (or HY-2S) 

Satellite details
Acronym HY-4A (or HY-2S)
Full name Hai Yang 4A
WIGOS Station Identifier ---
Satellite Description
  • First unit of the HY-4 programme.
  • Main mission: ocean salinity observation.
  • Contributions to sea surface temperature and sea surface roughness observations
  • The satellite is equipped with 3 types of remote sensing payloads: 
    • Active and passive microwave radiometer
    • Interferometric microwave radiometer
Mass at launch Dry mass
Power
Data access link no link provided
Data access information
  • Data distributed by NSOAS.
Orbit Sunsynchronous orbit Altitude 654 km
ECT 06:00 desc

 

Space agency NSOAS
Status Operational
Details on Status
(as available)
Launch 13 Nov 2024 EOL ≥2033
Last update: 2026-03-30
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on HY-4A (or HY-2S)

Acronym Full name
IMR Interferometric Microwave Radiometer
MICAP Microwave Imager Combined Active and Passive
Show instrument status and calibration
Satellite frequencies for Earth Observation, data transfer and platform communications and control
Earth observation MW frequencies
Service Sensing mode Frequency (GHz) Bandwidth (MHz) Polarisation Comments
Hai Yang 4A passive 1.4 GHz 25 MHz H&V
Hai Yang 4A passive 6.9 GHz 200 MHz H&V
Hai Yang 4A passive 18.7 GHz 200 MHz H&V
Hai Yang 4A active 1.25 GHz 4 MHz - Scatterometer