KOMPSAT-2

KOMPSAT-2
Names	Korean Multi-purpose Satellite-2; Arirang-2
Mission type	Earth observation
Operator	Korea Aerospace Research Institute
COSPAR ID	2006-031A
SATCAT no.	29258
Mission duration	3 years (planned); 18 years, 2 months and 29 days (in progress)
Spacecraft properties
Spacecraft type	KOMPSAT
Manufacturer	Korea Aerospace Industries; Korea Aerospace Research Institute; EADS Astrium (bus)
Launch mass	800 kg (1,800 lb)
Dimensions	1.85 m diameter x 2.6 m in height x 6.8 m length (deployed configuration)
Power	955 watts
Start of mission
Launch date	28 July 2006, 07:05:43 UTC
Rocket	Rokot/Briz-KM
Launch site	Plesetsk, Site 133/3
Contractor	Khrunichev State Research and Production Space Center
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Altitude	685 km (426 mi)
Inclination	98.13°
Period	98.46 minutes
Instruments
	Multispectral Camera (MSC)
	KOMPSAT programme ← KOMPSAT-1 KOMPSAT-3 →

KOMPSAT-2 (Korean Multi-purpose Satellite-2), also known as Arirang-2,^[2] is a South Korean multipurpose Earth observation satellite. It was launched from Plesetsk Cosmodrome, Russia at 07:45:43 UTC (16:05:43 KST) on 28 July 2006. It began to transmit signals at 14:00 UTC (23:00 KST) the same day. Like the earlier KOMPSAT-1 satellite, it takes its name from the popular Korean folk song Arirang. Its launch was the culmination of a project begun in 1995.^[3]

KOMPSAT-2 orbits at a height of 685 km (426 mi), circling the Earth 14 times per day, and is expected to maintain that orbit for 3 years. It weighs 800 kg (1,800 lb).^[4] The satellite carries a Multispectral Camera (MSC) which can distinguish to a 100-cm resolution, allowing the identification of individual vehicles on the ground.^[5] The satellite was succeeded by KOMPSAT-3, KOMPSAT-5 and KOMPSAT-3A, which were launched in 2012, 2013 and 2015 respectively.

History

South Korea started the KOMPSAT programme in 1995 to nurture its national Earth-imaging industry and supply services for remote-sensing applications. The South Korean KOMPSAT-2 Earth-imaging satellite was developed by Korea Aerospace Industries (KAI) and Korea Aerospace Research Institute (KARI), in partnership with EADS Astrium, to assure continuity with the KOMPSAT-1 satellite launched in 1999. KOMPSAT-2 was orbited on 28 July 2006 by a launch vehicle from Plesetsk, Russia. Spot Image was the distributor of KOMPSAT-2 imagery until April 2011. SI Imaging Services is the worldwide exclusive distributor of KOMPSAT imagery including KOMPSAT-2 since November 2012.

Technologies

Orbit

KOMPSAT-2 operates in a near-polar, circular Sun-synchronous orbit. The orbital parameters are:

Mean altitude: 685 km
Mass: 800 kg
Inclination: 98.1° (Sun-synchronous orbit)
Orbital period: 98.6 minutes
Orbital cycle: 28 days

Instruments

KOMPSAT-2's instruments are designed to acquire high- and very-high-resolution imagery with a footprint of 15 km. The satellite has the capacity to acquire 20 minutes of imagery on each orbit and it can steer its sensors both ways out to 30° off track. Panchromatic and multispectral images can be acquired at the same time.

KOMPSAT-2 radiometer features:

Kompsat-2 radiometric parameters
mode	Channel	Spectral band	Spatial resolution	Footprint
Multispectral	1	0.45 - 0.52 μm (blue)	4 m	15 km
	2	0.52 - 0.60 μm (green)	4 m	15 km
	3	0.63 - 0.69μm (rouge)	4 m	15 km
	4	0.76 - 0.90 μm (near-infrared)	4 m	15 km
Panchromatic	P	0.50 - 0.90 μm (black and white)	1 m	15 km

Ground receiving stations

Two receiving stations deliver KOMPSAT-2 imagery 1 to 3 days after acquisition and in under 24 hours in Europe. The Deajeon station in South Korea is responsible for tasking the satellite. The Toulouse station in France is responsible for updating the catalogue, producing imagery and delivering it to its customers.

Advantages and applications of KOMPSAT-2 imagery

KOMPSAT-2 is designed for very-high-resolution (VHR) remote-sensing applications, such as:

Land planning: to detect and identify features smaller than 1 square meter, e.g. vehicles, street furnishings, roads and bushes
Agriculture: to pinpoint crop or tree diseases
Urban planning and demographics: to locate detached houses
Civil engineering: to plan road, railroad and oil pipeline corridors
Defence: to describe high-value assets or military sites

North Korea

It serves along with the existing Kompsat-2 to provide continuous satellite observation of the Korean Peninsula, sending images twice a day at 1:30 and 13:30.^[6]

Mission

In October 2015, the Ministry of Science, ICT and Future Planning (MSIP) and KARI made plans about the future of the KOMPSAT-2 mission which is on orbit for more than 9 years. It was decided not to extend the KOMPSAT-2 mission any further for systematic observation services, but instead use it for research purposes until the end of its life cycle. Although KOMPSAT-2 was originally designed to have a life cycle of 3 years, this was extended three times (by two years each time, for a total of 6 years) by applying highly reliable satellite technology. KOMPSAT-2 has successfully carried out its mission of obtaining images of the Korean Peninsula and other major areas of the world over a period of nine years. KOMPSAT-2 is used in next-generation satellite technology research without any further extension of its mission until the end of its life cycle, as its operation systems - such as its payload module, sensor, and Earth station operation system (command transmission and satellite condition analysis) - are aged.^[7]

References

^ "Trajectory: Kompsat 2 2006-031A". NASA. 10 February 2021. Retrieved 1 March 2021. This article incorporates text from this source, which is in the public domain.
^ "KOMPSAT 2 (Arirang 2)". Gunter's Space Page. 7 July 2020. Retrieved 22 October 2021.
^ "KOMPSAT-1". ESA eoPortal Directory. 2021. Retrieved 22 October 2021.
^ "Multipurpose satellite Arirang 2 set for launch". The Korea Herald. 28 July 2006. Retrieved 29 July 2006.
^ "Arirang-2 to Monitor North Korea". The Korea Times. 23 July 2006. Archived from the original on 13 April 2020. Retrieved 29 July 2006.
^ "Arirang-3 launch lifts Korea's space program". The Korea Herald. 19 June 2012. Retrieved 24 October 2021.
^ "KOMPSAT-2". ESA eoPortal Directory. 2021. Retrieved 22 October 2021.

External links

[Trajectory-1] "Trajectory: Kompsat 2 2006-031A". NASA. 10 February 2021. Retrieved 1 March 2021. This article incorporates text from this source, which is in the public domain.

[GSP-2] "KOMPSAT 2 (Arirang 2)". Gunter's Space Page. 7 July 2020. Retrieved 22 October 2021.

[ESA1-3] "KOMPSAT-1". ESA eoPortal Directory. 2021. Retrieved 22 October 2021.

[4] "Multipurpose satellite Arirang 2 set for launch". The Korea Herald. 28 July 2006. Retrieved 29 July 2006.

[5] "Arirang-2 to Monitor North Korea". The Korea Times. 23 July 2006. Archived from the original on 13 April 2020. Retrieved 29 July 2006.

[KH20120619-6] "Arirang-3 launch lifts Korea's space program". The Korea Herald. 19 June 2012. Retrieved 24 October 2021.

[ESA2-7] "KOMPSAT-2". ESA eoPortal Directory. 2021. Retrieved 22 October 2021.

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v t e Korea Aerospace Industries aircraft and spacecraft
Fixed-wing aircraft	KT-1 KA-1 T-50 FA-50 KC-100 KT-100 KF-21
Helicopters	KUH-1 LCH LAH
Unmanned aerial vehicles	RQ-101 NCUAV
Transport aircraft	MC-X
Space launch vehicles	KSLV-II
Satellites	KOMPSAT 1 2 3 3A 5 6 7 7A GEO-KOMPSAT 2A 2B 3 CAS500 1 2

v t e ← 2005 Orbital launches in 2006 2007 →
January	New Horizons Daichi
February	EchoStar X MTSAT-2 Akari, CUTE-1.7 + APD Arabsat-4A
March	Spainsat, Hot Bird 7A ST-5 FalconSAT-2 Soyuz TMA-8
April	JCSAT-5A COSMIC Astra 1KR Progress M-56 EROS-B Yaogan 1 CALIPSO, CloudSat
May	Kosmos 2420 GOES 13 / EWS-G1 Satmex 6, Thaicom 5
June	Resurs-DK No.1 KazSat-1 Galaxy 16 USA-187, USA-188, USA-189 Progress M-57 Kosmos 2421 USA-184
July	STS-121 (MPLM) INSAT-4C Genesis I Kosmos 2422 BelKA, Baumanets, PicPot, SACRED, ION, Rincon 1, ICECube-1, KUTESat Pathfinder, SEEDS, nCube, HAUSAT-1, MEROPE, CP-2, AeroCube-1, CP-1, Mea Huaka'i, ICECube-2 Arirang-2
August	Hot Bird 8 JCSAT-3A, Syracuse 3B Koreasat 5
September	Shijian 8 STS-115 (ITS P3/4) IGS-3A Chinasat-22A Kosmos 2423 Soyuz TMA-9 Hinode, HIT-SAT, SSSAT USA-190
October	DirecTV-9S, Optus D1, LDREX MetOp-A Progress M-58 Shijian 6C, Shijian 6D STEREO Sinosat-2 XM-4
November	USA-191 Badr-4 USA-192
December	Fengyun 2-05 WildBlue 1, AMC-18 STS-116 (ITS P5, SpaceHab LSM, ANDE-MAA, ANDE-FACL, RAFT1, MARScom, MEPSI-2) MEASAT-3 USA-193 TacSat-2, GeneSat Kiku 8 SAR-Lupe 1 Meridian 1 Kosmos 2424, Kosmos 2425, Kosmos 2426 CoRoT
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).