KOMPSAT-1

KOMPSAT-1
Names	Korean Multi-purpose Satellite-1; Arirang-1
Mission type	Earth observation
Operator	Korea Aerospace Research Institute
COSPAR ID	1999-070A
SATCAT no.	26032
Mission duration	3 years (planned); 8 years (achieved)
Spacecraft properties
Spacecraft type	KOMPSAT
Bus	TOMS-EP
Manufacturer	Korea Aerospace Industries; Korea Aerospace Research Institute; TRW (bus)
Launch mass	470 kg (1,040 lb)
Dimensions	1.33 m (4 ft 4 in) in diameter; 2.33 m (7 ft 8 in) in length
Power	636 watts
Start of mission
Launch date	21 December 1999, 07:13 UTC
Rocket	Taurus 2110
Launch site	Vandenberg, LC-576E
Contractor	Orbital Sciences Corporation
End of mission
Deactivated	31 January 2008
Last contact	30 December 2007
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Altitude	685 km (426 mi)
Inclination	98.13°
Period	98.46 minutes
Instruments
	Electro-Optical Camera (EOC); High Energy Particles Detector (HEPD); Ionospheric Measurement Sensor (IMS)
	KOMPSAT programme KOMPSAT-2 →

KOMPSAT-1 (Korean Multi-purpose Satellite-1), also known as Arirang-1,^[3] was a satellite created by the Korea Aerospace Industries (KAI) and Korea Aerospace Research Institute (KARI), and launched by a United States launch vehicle on 21 December 1999. This was the first satellite built primarily by South Korean engineers, although previous foreign-built satellites had been launched by Korean companies. It took its name from the popular Korean folk song Arirang.

Instruments

It carried an Electro-Optical Camera (EOC) able to distinguish objects with a diameter of 6.6 m (22 ft) with a footprint of 17 km. The satellite carried remote sensing instruments for providing digital cartography of Korea, and status of marine biology. Also included was the Ionospheric Measurement Sensor (IMS) to monitor ionospheric parameters along the satellite orbit and the High Energy Particles Detector (HEPD).^[4]

High Energy Particle Detector (HEPD)

The High Energy Particle Detector (HEPD) instrument consists of a Proton and Electron Spectrometer (PES), a Linear Energy transfer Spectrometer (LET), a Total Dose Monitor (TDM), and a Single Event Monitor (SEM), PES measures protons from 6.4 MeV to 38 MeV in 3 energy channels, electrons from 0.25 MeV to <2.0 MeV in 3 energy channels, and alpha particles from 15 MeV to 60 MeV in an energy channel. LET measures linear energy transfer. TDM measures total ionizing dose of radiation accumulated on RADFET dosimeters. SEM measures single event upset (SEU).^[5]

Ionospheric Measurement Sensor (IMS)

The Ionospheric Measurement Sensor (IMS) is composed of a Langmuir probe (LP) and of the Electron Temperature Probe (ETP) developed by K. Oyama (Institute of Space and Astronautical Science (ISAS), Japan). LP measures the in-situ electron temperature and density and ETP measures the in-situ electron temperature and floating potential. The instrument monitored the variation of the nighttime ionosphere along the satellite track until the unexpected power failure of the probes on 2 August 2001.^[6]

Launch

The satellite was launched from Vandenberg Air Force Base in California on a Taurus 2110. It had been built in Daedeok Science Town in Daejeon, South Korea. The parts were shipped in three stages from Korea to California by First Express International, a Korean shipping firm.^[7]

The KOMPSAT-1 was succeeded by the KOMPSAT-2 in 2006.

Mission

On 30 December 2007, the KARI reported that they had lost contact with the satellite.^[1] It is suspected to have had a malfunction that has affected power generation. After the loss of contact with the satellite, the mission was formally ended 31 January 2008.^[1]

References

^ ^a ^b ^c "KOMPSAT-1". ESA eoPortal Directory. 2021. Retrieved 22 October 2021.
^ "Trajectory: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 1 March 2021. This article incorporates text from this source, which is in the public domain.
^ "KOMPSAT 1 (Arirang 1)". Gunter's Space Page. 7 July 2020. Retrieved 3 March 2021.
^ "Display: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 3 March 2021. This article incorporates text from this source, which is in the public domain.
^ "HEPD: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 3 March 2021. This article incorporates text from this source, which is in the public domain.
^ "IMS: KOMPSAT 1999-070A". NASA. 21 October 2021. Retrieved 22 October 2021. This article incorporates text from this source, which is in the public domain.
^ "First Express International". First Express. Archived from the original on 7 October 2007. Retrieved 30 July 2007.

External links

Profile of Korean space program by The Korea Times Archived 10 March 2007 at the Wayback Machine

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

[Trajectory-2] "Trajectory: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 1 March 2021. This article incorporates text from this source, which is in the public domain.

[Gunter-3] "KOMPSAT 1 (Arirang 1)". Gunter's Space Page. 7 July 2020. Retrieved 3 March 2021.

[Display-4] "Display: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 3 March 2021. This article incorporates text from this source, which is in the public domain.

[Experiment2-5] "HEPD: KOMPSAT 1999-070A". NASA. 10 February 2021. Retrieved 3 March 2021. This article incorporates text from this source, which is in the public domain.

[Experiment1-6] "IMS: KOMPSAT 1999-070A". NASA. 21 October 2021. Retrieved 22 October 2021. This article incorporates text from this source, which is in the public domain.

[7] "First Express International". First Express. Archived from the original on 7 October 2007. Retrieved 30 July 2007.

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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 ← 1998 Orbital launches in 1999 2000 →
January	Mars Polar Lander ROCSAT-1
February	Stardust Globalstar 23, Globalstar 36, Globalstar 38, Globalstar 40 Telstar 6 JCSAT-6 Soyuz TM-29 ARGOS, Ørsted, SUNSAT Arabsat 3A, Skynet 4E Globus No.15
March	Wide Field Infrared Explorer Globalstar 23, Globalstar 37, Globalstar 41, Globalstar 46 AsiaSat 3S DemoSat
April	Progress M-41, Sputnik 99 INSAT-2E USA-142 Eutelsat W3 Globalstar 19, Globalstar 42, Globalstar 44, Globalstar 45 Landsat 7 UoSAT-12 Ikonos-1 ABRIXAS, Megsat-0 USA-143
May	Orion 3 Feng Yun 1C, Shijian 5 TERRIERS, MUBLCOM Nimiq 1 USA-144 Oceansat-1, Kitsat-3, DLR-Tubsat STS-96 (Starshine 1)
June	Globalstar 25, Globalstar 47, Globalstar 49, Globalstar 52 Iridium 14A, Iridium 21A Astra 1H QuikSCAT FUSE
July	Gran' No.45 Molniya 3-50 Globalstar 30, Globalstar 32, Globalstar 35, Globalstar 51 Progress M-42 Okean-O No.1 STS-93 (Chandra) Globalstar 26, Globalstar 28, Globalstar 43, Globalstar 48
August	Telkom 1, Globalstar 24, Globalstar 27, Globalstar 53, Globalstar 54 Kosmos 2365 Kosmos 2366
September	Koreasat 3 Yamal-101, Yamal-102 Foton 12 Globalstar 33, Globalstar 50, Globalstar 55, Globalstar 58 EchoStar V Ikonos 2 Telstar 7 LMI-1 Resurs F-1M
October	USA-145 DirecTV-1R CBERS-1, SACI-1 Globalstar 31, Globalstar 56, Globalstar 57, Globalstar 59 Orion 2 Ekspress A1
November	GE-4 MTSAT-1 Shenzhou 1 Globalstar 29, Globalstar 34, Globalstar 39, Globalstar 61 USA-146
December	Hélios 1B, Clémentine Orbcomm FM30, Orbcomm FM31, Orbcomm FM32, Orbcomm FM33, Orbcomm FM34, Orbcomm FM35, Orbcomm FM36 XMM-Newton † VLS-1 V02 (SACI-2) USA-147 Terra STS-103 Arirang-1, ACRIMSAT, Millennial Galaxy 11 Kosmos 2367 Kosmos 2368
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).

Spacecraft properties

Names	Korean Multi-purpose Satellite-1 Arirang-1

Mission type	Earth observation
Operator	Korea Aerospace Research Institute
COSPAR ID	1999-070A
SATCAT no.	26032
Mission duration	3 years (planned) 8 years (achieved)


Spacecraft type	KOMPSAT
Bus	TOMS-EP^[1]
Manufacturer	Korea Aerospace Industries Korea Aerospace Research Institute TRW (bus)
Launch mass	470 kg (1,040 lb)
Dimensions	1.33 m (4 ft 4 in) in diameter 2.33 m (7 ft 8 in) in length
Power	636 watts


Start of mission
Launch date	21 December 1999, 07:13 UTC
Rocket	Taurus 2110
Launch site	Vandenberg, LC-576E
Contractor	Orbital Sciences Corporation


End of mission
Deactivated	31 January 2008
Last contact	30 December 2007


Orbital parameters
Reference system	Geocentric orbit^[2]
Regime	Sun-synchronous orbit
Altitude	685 km (426 mi)
Inclination	98.13°
Period	98.46 minutes

Instruments
Electro-Optical Camera (EOC) High Energy Particles Detector (HEPD) Ionospheric Measurement Sensor (IMS)
KOMPSAT programme KOMPSAT-2 →