Information Gathering Satellite

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Information Gathering Satellite (情報収集衛星 Jōhō Shūshū Eisei?) is a satellite in a Japanese spy satellite program. It was started as a response to the 1998 North Korean missile test over Japan. The satellite program's main mission is to provide early warning of impending hostile launches in the neighborhood. This program is under direct control of the cabinet. All of the Information Gathering Satellites were launched by an H-IIA rocket from Tanegashima Space Center. However, Earth observation is a rather new field for Japan. The first Japanese mission in this field MOS-1 was launched only in 1987.

On 28 March 2003, presumably partly in response to North Korea's launch of a Taepodong rocket over Japan in 1998, and partly to provide a source of satellite images other than through cooperation with the US, where the US charged roughly $10,000US dollars for each satellite image, Japan launched a radar and an optical spy satellite, officially known as IGS-1A and IGS-1B.[1][1] These satellites follow one another at 37-minute separation in a 492 km orbit, which passes over Pyongyang at 11:22 each day, according to observations collected on the seesat-L mailing list.

The program suffered a big setback when Japan lost the second pair of satellites because of an H-IIA launch failure on 29 November 2003.[2]

Except the satellite which failed in launching, a second optical surveillance satellite IGS 3A was launched on 11 September 2006.[3]

A third optical satellite IGS 4A and a second radar satellite IGS 4B were launched on 24 February 2007. IGS 4A is a more advanced and experimental optical satellite.[4]

A fourth optical satellite IGS 5A was launched on 28 November 2009. This satellite has the resolution that is higher than previous generation. [5]

Late March 2007, the first SAR satellite in the series, IGS 1B, suffered a critical power failure.[6][7] The satellite has since been observed to steadily come down and was clearly no longer under control.[8] An uncontrolled re-entry of this satellite occurred on July 26, 2012.[9] Since summer 2010, another of the SAR satellites, IGS 4B has also been unable to carry out its monitoring functions.[10]

Timetable

Launch Date (UTC) NORAD Designation[citation needed] Japanese Government Designation Sensor Type NORAD ID International code Status Generation Believed Resolution Initial Orbital Parameter Vehicle Result
28 March 2003 IGS 1A IGS-Optical 1 Optical 27698 2003-009A Retired 1st generation of optical Panchromatic sensor:About 1 m (mono)
Multi-spectral sensor:About 5 m (color)		 486–491 km, 97.3°, 94.4 min H2A2024 Success
IGS 1B IGS-Radar 1 SAR 27699 2003-009B Retired[6] 1st generation of SAR About 1~3 m
29 November 2003 N/A Nameless for launching failure Optical N/A N/A N/A 1st generation of optical Panchromatic sensor:About 1 m (mono)
Multi-spectral sensor:About 5 m (color)		 N/A H2A2024 Failure
N/A Nameless for launching failure SAR N/A N/A N/A 1st generation of SAR About 1~3m
11 September 2006 IGS 3A IGS-Optical 2 Optical 29393 2006-037A Retired 2nd generation of optical
(Improved type)		 1 m 478–479 km, 97.4°, 94.2 min H2A202 Success
24 February 2007 IGS 4A IGS-Optical 3V Optical 30586 2007-005A Retired 3rd generation of optical
(Largely improved type)		 About 60 cm 481–494 km, 97.2°, 94.4 min H2A2024 Success
IGS 4B IGS-Radar 2 SAR 30587 2007-005B Retired[10] 2nd generation of SAR
(Improved type)		 1 m
28 November 2009 IGS 5A IGS-Optical 3 Optical 36104 2009-066A Operational 3rd generation of optical
(Largely improved type)		 About 60 cm Unknown H2A202 Success
22 September 2011 IGS 6A IGS-Optical 4 Optical 37813 2011-050A Operational 4th generation of optical About 60 cm Unknown H2A202 Success
12 December 2011 IGS 7A IGS-Radar 3 SAR 37954 2011-075A Operational 3rd generation of SAR About 1m Unknown H2A202 Success
27 January 2013  ? IGS-Radar 4 SAR 39061 2013-002A Operational 3rd generation of SAR About 1m Unknown H2A202 Success
 ? IGS-Optical 5V Optical 39062 2013-002B Operational 5th generation of optical 40 cm
1 February 2015 IGS IGS-Radar Spare SAR 40381 2015-004A Operational 3rd generation of SAR About 1m Unknown H2A202 Success
26 March 2015 IGS OPTICAL 5 IGS-Optical 5 Optical 40538 2015-015A Operational 5th generation of optical 30 cm[11] or 40cm[12] Unknown H2A202 Success

References

  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ 10.0 10.1 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ 「北」監視能力の向上期待　情報収集衛星打ち上げ成功 Sankei March 26 2015
  12. ↑ H2Aロケット28号機打ち上げ成功　情報収集衛星搭載 March 26 2015

External links

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