JERS
Japanese Earth Resources Satellite

JERS-1 is Japan's 2nd Earth observation satellite. It is designed to provide global, all-weather imaging capability for agriculture, forestry, fishery, environmental protection, and disaster protection use. Some data will be also shared with the University of Alaska for research uses.

Spacecraft
3-axis stabilized, zero momentum bias system with magnetotorquers, reaction wheels. Earth, sun sensors provide 0.3 deg attitude knowledge. Hydrazine propulsion system. 72 Gbit solid state recorder. Single solar panel is 3.4 m x 8 m and provides 2050W BOL. 4 30 Ahr NiCd batteries.

Payload
SAR (Synthetic Aperture Radar) is L-band using HH polarization with a 35 deg look angle. The SAR has 18 m resolution (3 looks) with a 75 km swath and uses a corporate feed antenna 11.9 m x 2.4 m. Optical Sensor (OPS) can observe in 7 bands from visible to short wave infrared with stereoscopic imaging by a forward look of 15.3 deg, and provides 18 m resolution.

Country of Origin	Japan
Customer/User	NASDA
Manufacturer(s)	Mitsubishi Electric Co. (MELCO)
Size	1 x 1.8 x 3.1 m (bus) with 2.5 x 12 m SAR antenna
Orbit	568 km circular, sun-synchronous, 98 deg inclination, with 44 day repeat period and 10:45 am descending node
Related Sites	NASDA JERS Page

Launch Facts

Name	Int'l Desig.	Date	Site	Vehicle	Orbit	Mass(kg)
Notes
JERS-1	1992-007A	2/11/92	Tanegashima	H-1	LEO	1340
Japanese Research Satellite-1