Encyclopedia Astronautica
JERS


Japanese earth land resources satellite. One launch, 1992.02.11. JERS-1 (Japanese Research Satellite-1; FUYO-1) was Japan's second Earth observation satellite.

Its mission was to verify functions and performance of optical sensors and a Synthetic Aperture Radar.

Mitsubishi Electric Co. (MELCO) was the prime contractor, and the launching organization was NASDA. JERS was designed to provide global, all-weather imaging capability for agriculture, forestry, fishery, environmental protection, and disaster protection use. It would form part of an integrated system for observing the Earth's resources; to perform observations and measurements for land survey, agriculture, forestry, fishery, environmental preservation, disaster prevention and coastal surveillance. Some data would be also shared with the University of Alaska for research uses. The spacecraft was a 3-axis stabilized, zero momentum bias system with magnetotorquers, reaction wheels. Earth and sun sensors provided 0.3 deg attitude knowledge. The satellite used a hydrazine propulsion system and a 72 Gbit solid state recorder. The single solar panel was 3.4 m x 8 m, provided 2050 W BOL, and recharged 4 x 30 Ahr NiCd batteries.

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

AKA: Japanese Earth Resources Satellite.
Gross mass: 1,340 kg (2,950 lb).
Height: 3.10 m (10.10 ft).
Span: 12.00 m (39.00 ft).
First Launch: 1992.02.11.
Number: 1 .

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Associated Countries
See also
  • Delta The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Development began in 1955 and it continued in service in the 21st Century despite numerous candidate replacements. More...

Associated Launch Vehicles
  • Delta American orbital launch vehicle. The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Delta began as Thor, a crash December 1955 program to produce an intermediate range ballistic missile using existing components, which flew thirteen months after go-ahead. Fifteen months after that, a space launch version flew, using an existing upper stage. The addition of solid rocket boosters allowed the Thor core and Able/Delta upper stages to be stretched. Costs were kept down by using first and second-stage rocket engines surplus to the Apollo program in the 1970's. Continuous introduction of new 'existing' technology over the years resulted in an incredible evolution - the payload into a geosynchronous transfer orbit increasing from 68 kg in 1962 to 3810 kg by 2002. Delta survived innumerable attempts to kill the program and replace it with 'more rationale' alternatives. By 2008 nearly 1,000 boosters had flown over a fifty-year career, and cancellation was again announced. More...
  • H-1 Japanese license-built version of Delta launch vehicle, with Japanese-developed upper stages. More...

Associated Manufacturers and Agencies
  • NASDA Japanese agency overseeing development of rockets, spacecraft, and rocket engines. National Space Development Agency, Japan. More...
  • Mitsubishi Japanese manufacturer of rockets, spacecraft, and rocket engines. Mitsubishi Electric Corp, Japan. More...

Bibliography
  • McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: here.
  • JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: here.
  • McDowell, Jonathan, Launch Log, October 1998. Web Address when accessed: here.

Associated Launch Sites
  • Tanegashima Japan's main launch site for he larger N and H launch vehicles. In use for sounding rockets from 1967 and orbital launches from 1975. As of 2007 over 140 major launches had been made from the site. More...

JERS Chronology


1992 February 11 - . 01:50 GMT - . Launch Site: Tanegashima. Launch Complex: Tanegashima N. LV Family: Delta. Launch Vehicle: H-1. LV Configuration: H-1 H-24(F).
  • JERS-1 - . Payload: ERS-1. Mass: 1,340 kg (2,950 lb). Nation: Japan. Agency: NASDA. Class: Earth. Type: Earth resources satellite. Spacecraft: JERS. Completed Operations Date: 1998-10-12 . Decay Date: 2001-12-03 . USAF Sat Cat: 21867 . COSPAR: 1992-007A. Apogee: 568 km (352 mi). Perigee: 567 km (352 mi). Inclination: 97.7000 deg. Period: 96.00 min. Japanese Research Satellite-1. JERS-1 (FUYO-1). To verify functions and performance of optical sensors and a Synthetic Aperture Radar and to establish an integrated system for observing the Earth's resources; to perform observations and measurements for land survey, agriculture, forest ry, fishery, environmental preservation, disaster prevention and coastal surveillance. Launch time 0150 GMT. Launching organization NASDA. The Japanese Fuyo-1 (ERS-1) satellite failed on Oct 12, 1998 after six years of operation.

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