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IRS-1D

Names	Indian Remote Sensing satellite-1D
Mission type	Earth observation
Operator	ISRO
COSPAR ID	1997-057A
SATCAT no.	24971
Website	https://www.isro.gov.in/
Mission duration	3 years (planned) 12 years (achieved)
Spacecraft properties
Spacecraft	IRS-1D
Bus	IRS-1A
Manufacturer	Indian Space Research Organisation
Launch mass	1,250 kg (2,760 lb)
Dry mass	1,150 kg (2,540 lb)
Dimensions	1.65 m x 1.55 m x 2.30 m
Power	809 watts
Start of mission
Launch date	29 September 1997, 04:47 UTC
Rocket	Polar Satellite Launch Vehicle, PSLV-C1
Launch site	Satish Dhawan Space Centre, First Launch Pad (FLP)
Contractor	Indian Space Research Organisation
Entered service	December 1997
End of mission
Deactivated	15 January 2010
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Perigee altitude	740 km (460 mi)
Apogee altitude	817 km (508 mi)
Inclination	98.6°
Period	95.9 minutes
Instruments
Linear Imaging Self-Scanning Sensor-3 (LISS-3) Panchromatic Camera (PAN) Wide-Field Sensor (WiFS)
Earth observation satellites series← IRS-P3OceanSat-1 (IRS-P4) →

IRS-1D is the seventh satellite in Indian Remote Sensing satellite series of Earth Observation satellites, built, launched and maintained by Indian Space Research Organisation (ISRO). The satellite has similar capabilities as that of ISRO's IRS-1C satellite with some improvements added for better imagery particularly in thematic mapping.

Launch

The 1250 kg IRS-1D is an Indian remote sensing Sun-synchronous orbiter that was launched by the PSLV-C1 (Polar Satellite Launch Vehicle) launch vehicle from Sriharikota (in southeast India) at 04:47 UTC. The 44.4 metres, four-stage, 494-ton PSLV-1C is now an operational vehicle, after earlier test launches, it is the fourth launch vehicle PSLV. Orbit maneuvers may be planned to raise the perigee.

Due to a slight under performance of PSLV fourth stage, IRS-1D was injected with a velocity that was 130 m/sec less than the required 7446 m/sec. This minor shortfall in the injection velocity resulted in IRS-1D being injected into a polar orbit with an apogee of 822 km and a perigee of 301 km instead of the intended 817 km circular orbit. But, ISRO scientists, monitoring and controlling the satellite from ISRO Telemetry, Tracking and Command Network (ISTRAC) executed meticulously planned orbit manoeuvres to successfully put IRS-1D into a functional Sun-synchronous orbit of 740 km perigee and 817 km apogee.

Instruments

The satellite carried following instruments on board:

• Linear Imaging Self-Scanning Sensor-3 (LISS-3) of 23.5 m (77 ft) resolution in (VIS / NIR, 70.5 m (231 ft) resolution in short-wave infrared (SWIR), for high-resolution land and vegetation observation
• Panchromatic Camera (PAN) of 5.8 m (19 ft) resolution, for very-high-resolution land imagery
• Wide-Field Sensor (WiFS) of 190 m (620 ft) resolution, for land and vegetation observation

An on board tape recorder stores data over unreachable intervals. Sensed data on Indian and foreign terrains will be sold through an American company (after the usual clearance by Indian military).

Mission

IRS-1D completed its services on 15 January 2010 after serving for 12 years.

See also

• Indian Remote Sensing

References

1. ^ "Satellite: IRS-1D". World Meteorological Organization. 28 July 2015. Retrieved 13 May 2021.
2. "IRS-1D". ISRO. 29 September 1997. Archived from the original on 24 April 2021. Retrieved 13 May 2021.
3. "IRS-1D". ISRO. Archived from the original on 25 November 2010. Retrieved 26 February 2013.
4. ^ "Display: IRS-1D 1997-057A". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.
5. "IRS-1D Completes Three Years in Orbit". Space Daily. 29 October 2000. Retrieved 13 May 2021.
6. "Display: IRS-1C 1995-072". NASA. 27 April 2021. Retrieved 13 May 2021. This article incorporates text from this source, which is in the public domain.

v t e Indian spacecraft
List of Indian satellites List of Satish Dhawan Space Centre launches List of ISRO missions
Satellites	Communication CMS 01 02 GSAT 1 2 3 (EDUSAT) 4 5P 6 6A 7 7A 8 9 (South Asia Satellite) 10 11 12 14 15 16 17 18 19 29 30 31 HAMSAT INSAT 1A 1B 1C 1D 2A 2B 2C 2D 2DT 2E 3A 3B 3C 3D 3DR 3DS 3E 4A 4B 4C 4CR 4E 4F 4G Planned: GSAT 20 22 23 24 Earth observation Bhaskara I II Cartosat 1 2 2A 2B 2C 2D 2E 2F 3 EMISAT EOS 1 2 4 7 8 HySIS IMS-1 IRS 1A 1B 1C 1D 1E P1 P2 P3 Megha-Tropiques Microsat Microsat-R Oceansat 1 2 Resourcesat 1 2 RISAT 1 2 2B 2BR1 Rohini RS-D1 RS-D2 SARAL SCATSAT-1 Technology Experiment Satellite (TESS) Planned: NISAR GISAT Oceansat-3 Resourcesat-3 RISAT-1A Experimental APPLE Aryabhata Rohini RS-1 Rohini Technology Payload (RTP) Navigation IRNSS 1A 1B 1C 1D 1E 1F 1G 1I NVS-01 Student satellites ANUSAT Jugnu SRMSAT StudSat StudSat-2 YouthSat Pratham
Space probes	Scientific SROSS A B C C2 Astronomical Astrosat Aditya-L1 XPoSat AstroSat-2 (planned) Lunar programme Chandrayaan-1 Moon Impact Probe Chandrayaan-2 Vikram Pragyan Chandrayaan-3 Vikram Pragyan Lunar Polar Exploration Mission Chandrayaan-4 Chandrayaan-5 Chandrayaan-6 Interplanetary Mars Orbiter Mission Mars Orbiter Mission 2 (planned) Venus Orbiter Mission (planned)
Human spaceflight	Indian Human Spaceflight Programme SRE-1 SRE-II SRE-III Gaganyaan CARE Bharatiya Antariksha Station
Future spacecraft in italics.

• Earth observation satellites of India
• Satellite launch anomalies
• Spacecraft launched in 1997
• 1997 in India