IRS-1A

IRS-1A
Names	Indian Remote Sensing satellite-1A
Mission type	Earth observation
Operator	ISRO
COSPAR ID	1988-021A
SATCAT no.	18960
Website	https://www.isro.gov.in/
Mission duration	3 years (planned); 4 years (achieved)
Spacecraft properties
Spacecraft	IRS-1A
Bus	IRS-1
Manufacturer	Indian Space Research Organization
Launch mass	975 kg (2,150 lb)
Dry mass	895 kg (1,973 lb)
Dimensions	1.56 m x 1.66 m x 1.10 m
Power	600 watts
Start of mission
Launch date	17 March 1988, 06:43:00 UTC
Rocket	Vostok-2M s/n L15000-79
Launch site	Baikonur Cosmodrome, Site 31
Contractor	OKB-1
Entered service	June 1988
End of mission
Deactivated	1 July 1992
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Perigee altitude	863 km (536 mi)
Apogee altitude	917 km (570 mi)
Inclination	99.01°
Period	102.7 minutes
Instruments
	Linear Imaging Self-Scanning Sensor-1 (LISS-1); Linear Imaging Self-Scanning Sensor-2 (LISS-2)
	Earth observation satellites series IRS-1B →

IRS-1A, Indian Remote Sensing satellite-1A, the first of the series of indigenous state-of-art remote sensing satellites, was successfully launched into a polar Sun-synchronous orbit on 17 March 1988 from the Soviet Cosmodrome at Baikonur. IRS-1A carries two sensors, LISS-1 and LISS-2, with resolutions of 72 m (236 ft) and 36 m (118 ft) respectively with a swath width of about 140 km (87 mi) during each pass over the country. Undertaken by the Indian Space Research Organisation (ISRO). It was a part-operational, part-experimental mission to develop Indian expertise in satellite imagery.

History

The availability of Landsat imagery created a lot of interest in the science community. The Hyderabad ground station started receiving Landsat data on a regular basis in 1978. The Landsat program with its design and potentials was certainly a great model and yardstick for the IRS programme. IRS-1A was the first remote sensing mission to provide imagery for various land-based applications, such as agriculture, forestry, geology, and hydrology.^[3] The mission's long-term objective was to develop indigenous remote sensing capability.^[4]

Satellite description

The satellite bus, measuring 1.56 m x 1.66 m x 1.10 metres, had the payload module attached on the top and a deployable solar panels stowed on either side. Attitude control was provided by four-momentum wheels, two magnetic torques, and a thruster system. Together, they gave an estimated accuracy of better than ± 0.10° in all three axes.^[3]

Instruments

IRS-1A carried two "Linear Imaging Self-Scanning Sensor", LISS-1 and LISS-2, with a spatial resolution of 72 m (236 ft) and 36 m (118 ft) respectively.^[5] The three-axis-stabilised Sun-synchronous satellite carried LISS sensors which performed "push-broom" scanning in visible and near-infrared bands to acquire images of the Earth. Local equatorial crossing time (ECT) was fixed at around 10:30 of the morning.^[3]

Launch

IRS-1A was launched on 17 March 1988, at 06:43:00 UTC. It had a perigee of 863 km (536 mi), an apogee of 917 km (570 mi), an inclination of 99.01°, and an orbital period of 102.7 minutes.^[2]

Mission

IRS-1A was operated in a Sun-synchronous orbit. IRS-1A successfully completed its mission on 1 July 1992 after operating for 4 years.^[1]

References

^ ^a ^b ^c "IRS-1A". World Meteorological Organization. 28 July 2015. Archived from the original on 18 May 2023. Retrieved 12 May 2021.
^ ^a ^b "Trajectory: IRS-1A 1988-021A". NASA. 27 April 2021. Retrieved 12 May 2021. This article incorporates text from this source, which is in the public domain.
^ ^a ^b ^c "Display: IRS-1A 1988-021A". NASA. 27 April 2021. Retrieved 12 May 2021. This article incorporates text from this source, which is in the public domain.
^ "Indian Remote Sensing Satellite-1A". CEOS International Directory Network (IDN). Archived from the original on 3 March 2016. Retrieved 8 April 2013.
^ "IRS-1A (Indian Remote Sensing Satellite-1A)". ESA Earth Observation Portal. Retrieved 12 May 2021.

External links

ISRO IRS-1A link

[WMO-1] "IRS-1A". World Meteorological Organization. 28 July 2015. Archived from the original on 18 May 2023. Retrieved 12 May 2021.

[Trajectory-2] "Trajectory: IRS-1A 1988-021A". NASA. 27 April 2021. Retrieved 12 May 2021. This article incorporates text from this source, which is in the public domain.

[Display-3] "Display: IRS-1A 1988-021A". NASA. 27 April 2021. Retrieved 12 May 2021. This article incorporates text from this source, which is in the public domain.

[4] "Indian Remote Sensing Satellite-1A". CEOS International Directory Network (IDN). Archived from the original on 3 March 2016. Retrieved 8 April 2013.

[ESA-5] "IRS-1A (Indian Remote Sensing Satellite-1A)". ESA Earth Observation Portal. Retrieved 12 May 2021.

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v t e ← 1987 Orbital launches in 1988 1989 →
January	Kosmos 1908 Kosmos 1909, Kosmos 1910, Kosmos 1911, Kosmos 1912, Kosmos 1913, Kosmos 1914 Gorizont No.25L Progress 34 Kosmos 1915 Meteor-2 No.20
February	USA-29 Kosmos 1916 USA-30 Kosmos 1919, Kosmos 1917, Kosmos 1918 Kosmos 1920 Kosmos 1921 Sakura 3a Kosmos 1922
March	Zhongxing-1 Kosmos 1923 Kosmos 1924, Kosmos 1925, Kosmos 1926, Kosmos 1927, Kosmos 1928, Kosmos 1929, Kosmos 1930, Kosmos 1931 Molniya-1 No.65 Spacenet 3R, Telecom 1C Kosmos 1932 Kosmos 1933 IRS-1A Molniya-1 No.64 Kosmos 1934 Progress 35 Kosmos 1935 San Marco 5 Kosmos 1936 Gorizont No.26L
April	Kosmos 1937 Kosmos 1938 Foton No.4L Kosmos 1939 Transit-O 23, Transit-O 32 Kosmos 1940 Kosmos 1941
May	Ekran No.31L Kosmos 1942 Progress 36 Kosmos 1943 Intelsat VA F-13 Kosmos 1944 Kosmos 1945 Kosmos 1946, Kosmos 1947, Kosmos 1948 Molniya-3 No.49 Kosmos 1949 Kosmos 1950 Kosmos 1951
June	Soyuz TM-5 Kosmos 1952 Kosmos 1953 Meteosat 3, PAS-1, OSCAR-13 Nova 2 Kosmos 1954 Kosmos 1955 Kosmos 1956
July	Okean-O1 No.5 Kosmos 1957 Fobos 1 Unnamed Fobos 2 SROSS-B Kosmos 1958 Progress 37 Kosmos 1959 INSAT-1C, ECS-5 Meteor-3 No.3 Resurs-F1 No.30 Kosmos 1960
August	Kosmos 1961 Fanhui Shi Weixing I-02 Kosmos 1962 Molniya-1 No.66 Kosmos 1963 Gorizont No.28L Kosmos 1964 Kosmos 1965 Transit-O 25, Transit-O 31 Soyuz TM-6 Kosmos 1966
September	USA-31 USA-32 Kosmos 1967 Fengyun I-01 GStar-3, SBS-5 Kosmos 1968 Progress 38 Kosmos 1969 Kosmos 1970, Kosmos 1971, Kosmos 1972 Sakura 3b Ofek-1 Kosmos 1973 NOAA-11 Molniya-3 No.51 STS-26 (TDRS-3)
October	Kosmos 1974 Kosmos 1975 Kosmos 1976 Gran' No.34L Kosmos 1977 Kosmos 1978 TDF 1
November	USA-33 Unnamed Buran 1K1 (37KB No.3770) Kosmos 1979 Kosmos 1980 Kosmos 1981 Soyuz TM-7 Kosmos 1982
December	STS-27 (USA-34) Kosmos 1983 Ekran-M No.12L Skynet 4B, Astra 1A Kosmos 1984 Zhongxing-2 Molniya-3 No.52 Kosmos 1985 Progress 39 Molniya-1 No.63 Kosmos 1986
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).