JERS-1 OPS

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1. JERS-1 and OPS Specifications and Characteristics

Main Charactoristics of JERS-1 Satellite

Dimensions	Bus body: approx 1m x 1.8m x 3.1m Box_shape SAR Antenna: approx 12m x 2.5m Solar Cell Paddle: approx 8m x 3.4m
Weight	approx 1.4 tons
Attitude and Orbit Control Subsystem	3-Axis Attitude/Zero-momentum System
Design Life	2 years
Launch Vehicle	H-1 Launch Vehicle
Launch Site	Tanegashima Space Center
Launched Date	Feburary 11, 1992
Orbit	Sort of orbit	Sun Synchronous Subrecurrent Orbit
	Altitude	approx 570km
	Orbit inclination	approx 98 degree
	Period	approx 96 minutes
	Recurrent period	44 days
	Local time at descending node	a.m.10:30�`a.m.11:00

JERS-1 is equipped with following instruments exclusively for
transmitting and recording observed data.

Parameters of transmission and recording equipements

Mission Data Transmitter [MDT]	Carrier Frequency	8GHz Bands, 2 channels
	Moduration	QPSK
	Power amplifier	TWT(Helix type)
	Antenna type	Shaped reflector beam antenna
Mission Data Recorder [MDR]	Recording data rate	30Mbps x 2ch
	Recording Time	20 minutes

OPS major characteristics

OPtical Sensor [OPS]	Swath	75km
	Resolution	18m x 24m
	Number of Observation Bands	3 visible and near infrared bands 1 stereo-viewing band 4 shortwave infrared bands

The relation between the reflectance of minerals and the wavelength range of each short wave infrared(SWIR) bands are shown in the following figure.

The JERS-1 OPS band configuration and their effectiveness in mineral
classification with SWIR relative reflectance pattern.

3. OPS Images

An OPS Image shown below, is from typical altered zone, which is processed and analyzed by ERSDAC.
(Click the JPEGimage, then expand to GIF:903x900pixels, 1168kB)

JERS-1, OPS ratio compressed image(BGR=6/8, 2/1, 3/5).
Observation Date: October 9, 1992 Path 534-Row 239
Beatty, Nevada, USA.

The area high-lighted in yellow with ratio compressed, indicate
possibly containing gold-silver deposits in the Tertiary clastic rocks.
(central part of the image)

4. Areal Coverage of OPS Observations

The areas covered by OPS obserations, are shown in green area of following chart.

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