KOMPSAT-3A

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KOMPSAT-3A
G SA KOMPSAT-3A 01.jpg
NamesKorean Multi-purpose Satellite-3A
Arirang-3A
Mission type Earth observation
Operator Korea Aerospace Research Institute
COSPAR ID 2015-014A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 40536 OOjs UI icon edit-ltr-progressive.svg
Mission duration5 years (planned)
10 years and 1 month (in progress)
Spacecraft properties
Spacecraft type KOMPSAT
Manufacturer Korea Aerospace Industries, several private companies
Launch mass1,100 kg (2,400 lb)
Dimensions2.0 m in diameter x 3.8 m in height
Power4.5 kW
Orbital parameters
Regime Sun-synchronous orbit
Altitude528 km (328 mi)
KOMPSAT programme
  KOMPSAT-5
KOMPSAT-6  

KOMPSAT-3A (Korean Multi-purpose Satellite-3A), also known as Arirang-3A, is a South Korean Earth observation satellite equipped with a 55cm-resolution electro-optical camera and an infrared sensor developed by the Korea Aerospace Research Institute. It was launched on March 26, 2015.

Contents

Development

KOMPSAT-3A being built by engineers arirang 3Aho gaebal jangmyeon (270).jpeg
KOMPSAT-3A being built by engineers

KOMPSAT-3A was developed by the Korea Aerospace Research Institute over eight years from December 2006 with a total project cost of 235.9 billion won. [1]

Four companies, including Korean Air, Hanwha, Satrec Initiative, and the AP System-Korea Aerospace Industries consortium, participated in the private sector bid for satellite development that closed in 2009. All of these companies participated in the development of KOMPSAT-1 and KOMPSAT-2. [2]

The KAI-AP Aerospace consortium was responsible for manufacturing the main body after receiving technology of KARI, while Korean Air, Doowon Heavy Industries, Hanwha, Alpion, Setrec Initiative, and Samsung Thales were in charge of the main body and payload sectors. [3]

Technology

It is the first South Korean-made satellite to be equipped with a high-performance infrared sensor and a submeter-level optical sensor. [3] The onboard electro-optical camera identifies objects 0.5 cm above ground in both width and height. In addition, when post-processing images obtained from a satellite, high-resolution images with a resolution of 0.5 m or less can be obtained. [4] The main functions of the equipped infrared sensor are as follows:

Its size is 2.0 m in diameter, 3.8 m in height, 6.3 m in width, weighs 1.1 tons, and its design life is 4 years. [3]

Mission

It was launched on March 26, 2015 at 3:08 a.m. aboard the Dnepr from the Yasny launch base in Russia. [5]

At 1:04 p.m. KST, through communication with the Korea Aerospace Research Institute Satellite Control Center in Daejeon, it was confirmed that the satellite's overall condition was good. [5]

The main mission of KOMPSAT 3-A is to perform an Earth observation mission by orbiting the Korean Peninsula twice a day and night, 528 km for four years. It can photograph the Peninsula for 10 minutes with an optical lens and for 2 minutes with an infrared sensor, and can observe natural disasters such as forest fires, volcanic eruptions, oil wells or coal seam fires, and climate phenomena such as urban heat islands. [3] [6]

In 2018, Setrec Imaging Services (SIIS), a national satellite image export sales agency, signed a contract with India to supply images of Indian territory taken by KOMPSAT-3 and 3A for 4 million dollars for two years. [7]

See also

References

  1. "미래창조과학부 보도자료" (PDF). Archived from the original (PDF) on 2017-10-04. Retrieved 2017-10-04.
  2. "민간 이전 아리랑 3A호 위성본체 개발 '4파전'". Korea Economic Daily. 1 December 2009.
  3. 1 2 3 4 "'전천후 지구관측 위성시대' 열어줄 아리랑 3A호". Yonhap News . 25 March 2015.
  4. "아리랑위성 3A호 촬영 영상 일반에 판매". Yonhap News . 4 July 2016.
  5. 1 2 "아리랑 3A호 위성 발사 성공... 한국, 악천후에도 지상 55㎝ 물체 보는 '눈' 가졌다". Kyunghyang Shinmun. 26 March 2015.
  6. "우리 위성으로 24시간 한반도 관측한다". Kyunghyang Shinmun . 11 March 2015.
  7. "아리랑위성이 찍은 필리핀·인도 영토 영상 수출키로". Yonhap News . 20 February 2018.