Indian Remote Sensing
Indian Remote Sensing satellites (IRS) are a series of Earth Observation satellites, built, launched and maintained by Indian Space Research Organisation. The IRS series provides many remote sensing services to India.
Following the successful demonstration flights of Bhaskhar and Bhaskara-2 satellites launched in 1979 and 1981, respectively, India began to develop the indigenous Indian Remote Sensing (IRS) satellite program to support the national economy in the areas of agriculture, water resources, forestry and ecology, geology, water sheds, marine fisheries and coastal management.
Towards this end, India established the National Natural Resources Management System (NNRMS) for which the Department of Space (DOS) is the nodal agency, providing operational remote sensing data services. Data from the IRS satellites is received and disseminated by several countries all over the world. With the advent of high-resolution satellites new applications in the areas of urban sprawl, infrastructure planning and other large scale applications for mapping have been initiated.
The IRS system is the largest constellation of remote sensing satellites for civilian use in operation today in the world, with 12 operational satellites. All these are placed in polar sun-synchronous orbit and provide data in a variety of spatial, spectral and temporal resolutions. Indian Remote Sensing Programme completed its 25 years of successful operations on March 17th, 2013.
IRS data applications
Data from Indian Remote Sensing satellites are used for various applications of resources survey and management under the National Natural Resources Management System (NNRMS). Following is the list of those applications:
- Preharvest crop area and production estimation of major crops.
- Drought monitoring and assessment based on vegetation condition.
- Flood risk zone mapping and flood damage assessment.
- Hydro-geomorphological maps for locating underground water resources for drilling well.
- Irrigation command area status monitoring
- Snow-melt run-off estimates for planning water use in down stream projects
- Land use and land cover mapping
- Urban planning
- Forest survey
- Wetland mapping
- Environmental impact analysis
- Mineral Prospecting
- Coastal studies
- Integrated Mission for Sustainable Development (initiated in 1992) for generating locale-specific prescriptions for integrated land and water resources development in 174 districts.
IRS launch log
The initial versions are composed of the 1 (A,B,C,D). The later versions are named based on their area of application including OceanSat, CartoSat, ResourceSat. Some of the satellites have alternate designations based on the launch number and vehicle (P series for PSLV).
|Serial No.||Satellite||Date of Launch||Launch Vehicle||Status|
|1||IRS 1A||17 March 1988||Vostok, USSR||Mission Completed|
|2||IRS 1B||29 August 1991||Vostok, USSR||Mission Completed|
|3||IRS P1 (also IE)||20 September 1993||PSLV-D1||Crashed, due to launch failure of PSLV|
|4||IRS-P2||15 October 1994||PSLV-D2||Mission Completed|
|5||IRS-1C||28 December 1995||Molniya, Russia||Mission Completed|
|6||IRS-P3||21 March 1996||PSLV-D3||Mission Completed|
|7||IRS 1D||29 September 1997||PSLV-C1||Mission Completed|
|8||IRS-P4 (Oceansat-1)||27 May 1999||PSLV-C2||Mission Completed|
|9||Technology Experiment Satellite (TES)||22 October 2001||PSLV-C3||Mission Completed|
|10||IRS P6 (Resourcesat-1)||17 October 2003||PSLV-C5||In Service|
|11||IRS P5 (Cartosat 1)||5 May 2005||PSLV-C6||In Service|
|12||Cartosat 2 (IRS P7)||10 January 2007||PSLV-C7||In Service|
|13||Cartosat 2A||28 April 2008||PSLV-C9||In Service|
|14||IMS 1||28 April 2008||PSLV-C9||In Service|
|15||Oceansat-2||23 September 2009||PSLV-C14||In Service|
|16||Cartosat-2B||12 July 2010||PSLV-C15||In Service|
|17||Resourcesat-2||20 April 2011||PSLV-C16||In Service|
|18||Megha-Tropiques||12 October 2011||PSLV-C18||In Service|
|19||RISAT-1||26 April 2012||PSLV-C19||In Service|
|20||SARAL||25 Feb 2013||PSLV-C20||In Service|
Future IRS launches
- RESOURCESAT-3: A follow on to Resourcesat-2, it will carry more advanced LISS-III-WS (Wide Swath) Sensor having similar swath and revisit capability as Advanced Wide Field Sensor (AWiFS), thus overcoming any spatial resolution limitation of AWiFS. Satellite would also carry Atmospheric Correction Sensor (ACS) for quantitative interpretation and geophysical parameter retrieval. It slated to be launched during 2011-12.
- CARTOSAT-3: A continuation of Cartosat series, it will have a resolution 30 cm and 6 km swath suitable for cadastre and infrastructure mapping and analysis. It would also enhance disaster monitoring and damage assessment. It is slated to be launched during 2011-12.
- OCEANSAT-3: Oceasat-3 would carry Thermal IR Sensor, 12 channel Ocean Color Monitor, Scatterometer and Passive Microwave Radiometer. IR Sensor and Ocean Color Monitor would be used in the analysis for operational Potential Fishing Zones. Satellite is mainly for Ocean biology and sea state applications. It is slated to the launched aboard PSLV in 2012-13.
Satellite data acquisition and processing
The National Remote Sensing Centre (NRSC) at Hyderabad is the nodal agency for reception, archival, processing and dissemination of remote sensing data in the country. NRSC acquires and processes data from all Indian remote sensing satellites like Cartosat-1, Cartosat-2, Resourcesat-1, IRS-1D, Oceansat-1 and Technology Experiment Satellite as well as foreign satellites like Terra, NOAA and ERS.
- FAS website on IRS
- "Indian Remote Sensing Satellite (IRS) Series - A SAGA OF 25 YEARS". Indian Space Research Organisation. p. 9. Retrieved March 13, 2013.
- IRS Satellites in ISRO annual report of year 2006-07
- Eleventh Five Year Plan For Indian Space Programme
- CartoSat 2 images
- Official ISRO website
- FAS article on IRS system
- Bharat-Rakshak article on IRS system