The IGS-Radar 3 and 4 (Intelligence Gathering Satellite), are the second generation of Japanese radar reconnaissance satellites. The satellite are operated by the Cabinet Satellite Information Center. The satellite serves both Japan's national defense and civil natural disaster monitoring.
Reportedly, the satellite has a ground resolution of less than 1 m.
| Nation: | Japan |
|---|---|
| Type / Application: | Reconnaissance, radar |
| Operator: | CSICE |
| Contractors: | Mitsubishi Electric (MELCO) |
| Equipment: | ? |
| Configuration: | ? |
| Propulsion: | ? |
| Power: | |
| Lifetime: | |
| Mass: | |
| Orbit: | 473 km × 513 km, 97.42° (#3); 508 km × 514 km, 97.51° (#4); 485 km × 499 km, 97.23° (#5); 500 km × 500 km, 97.38° (#6); 490 km × 511 km, 97.52° (#Spare) |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| IGS-Radar 3 | 2011-075A | 12.12.2011 | Ta YLP-1 | H-2A-202 | ||
| IGS-Radar 4 | 2013-002A | 27.01.2013 | Ta YLP-1 | H-2A-202 | with IGS-Optical 5V | |
| IGS-Radar 5 | 2017-015A | 17.03.2017 | Ta YLP-1 | H-2A-202 | ||
| IGS-Radar 6 | 2018-052A | 12.06.2018 | Ta YLP-1 | H-2A-202 | ||
| IGS-Radar 7 | 2023-012A | 26.01.2023 | Ta YLP-1 | H-2A-202 | ||
| IGS-Radar 8 | - | 2024 | Ta YLP-1 | H-2A-202 | ||
| IGS-Radar Spare | 2015-004A | 01.02.2015 | Ta YLP-1 | H-2A-202 |
