HY 2A [CAST]
Official name HAIYANG 2A
Alternative name Hai Yang 2A
Cospar ID 2011-043A
Norad ID 37781
Launch date 2011-08-15
Launch site TSC
Launch vehicle CZ-4B
Country/Organization China
Type application Oceanography
Operator CAST
RCS size LARGE
Decay date ON ORBIT
Period (min) 104.44
Inclination (deg) 99.33
Perigee (km) 967
Apogee (km) 969
Eccentricity 0.00103305785123967
Mean motion (revs. per day) 13.7878207583301
Semi-Major axis (km) 7346.135
Raan (deg) 129.7152
Arg of perigee (deg) 130.8309
Shape Box + 2 Pan
Mass (kg) 360
Height (m) 1
Width (m) 1
Depth (m) 1
Span (m^2) 4
Equipment dual-frequency altimeter (Ku and C-bands), scatterometer, microwave imager
Power Deployable solar array, batteries

HY 2 (Haiyang = Ocean) is a chinese series of Earth observation satellites focused on the marine dynamic environment.

The objective of the HY-2 satellites is to monitor the dynamic ocean environment with microwave sensors to detect sea surface wind field, sea surface height and sea surface temperature. The instrument suit consists of an altimeter (dual-frequency in Ku and C-bands), a scatterometer and a microwave imager.

HY 2A was launched by a CZ-4B launch vehicle from Taiyuan Satellite Launch Center in August 2011.

HY 2B followed on 24 October 2018 again on a CZ-4B launch vehicle from Taiyuan Satellite Launch Center.

Satellite COSPAR Date LS Launch Vehicle Remarks
HAIYANG 2A 2011-043A 2011-08-15 TSC CZ-4B
HAIYANG 2B 2018-081A 2018-10-24 TSC CZ-4B with Tangguo Guan