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IGS-Optical 3, 4

The IGS-Optical 3, and 4 (Intelligence Gathering Satellite) are the second generation Japanese optical reconnaissance satellite. The satellites are operated by the Cabinet Satellite Information Center. The satellite serves both Japan's national defense and civil natural disaster monitoring.

IGS-Optical 3 ended operations in September 2017 after a malfunction has occurred in the power supply system.

Nation: Japan
Type / Application: Reconnaissance, optical
Contractors: Mitsubishi Electric (MELCO)
Equipment: ?
Configuration: ?
Propulsion: ?
Orbit: 483 km × 495 km, 97.4 (#1a)
Satellite COSPAR Date LS Launch Vehicle Remarks
IGS-Optical 3 2009-066A 28.11.2009 Ta YLP-1 H-2A-202
IGS-Optical 4 2011-050A 23.09.2011 Ta YLP-1 H-2A-202