IRS Data Products:
The launch of India’s first civilian remote sensing satellite IRS-1A in March 1988, marked the beginning of a successful journey in the course of the Indian Space Programme. The Indian Earth Observation activities carried out under the institutional framework of the National Natural Resources Management System (NNRMS) under the aegis of the Planning Commission activities are widely acclaimed around the world for their application driven approach. With a host of payloads in the thematic series of Indian Remote Sensing Satellites (IRS) and the INSAT systems, the Indian EO system has been providing operational services to the user community in the country. The thematic series of satellites in the land and water resources management; the cartographic and large scale mapping applications; and the ocean and atmospheric research areas has been planned with a view to provide necessary continuity of operational services in an assured manner.
Earth Observation Satellites
The Indian Remote Sensing satellite system has one of the largest constellations of remote sensing satellites in operation in the world today. With currently 9 operational satellites in orbit - IRS-1D, TES, Oceansat-1, Resourcesat-1, CARTOSAT-1, CARTOSAT-2, CARTOSAT-2A, IMS-1 and RISAT-2. IRS series of satellites provide data in a variety of spatial, spectral and temporal resolutions. With these and the planned thematic series of satellites in the coming years, such as RESOURCESAT-2, OCEANSAT-2, CARTOSAT-3, Megha Tropiques, SARAL, and INSAT-3D, the Indian EO system is expected to continue to provide products and services enabling applications in several areas spanning from cartography to climate.
CARTOSAT -2
CARTOSAT-2, the twelfth in the Indian Remote Sensing (IRS) satellite series, is an advanced remote sensing satellite capable of providing scene-specific spot imagery. CARTOSAT-2, launched on January 10, 2007, carries a single panchromatic camera onboard capable of providing better than 1-meter spatial resolution imagery, with a swath of 9.6 km. The satellite has high agility with capability of steering along and across the track up to + 45 deg to facilitate imaging of any area more frequently. It was placed in a sun synchronous polar orbit of a nominal altitude of 630 km and can be brought to a special orbit of 560 km with revisit periods of 4 days and 1 day respectively.
Cartosat-2 satellite has been functioning well, providing operational services to the user community. The data from the satellite is being used for cartographic applications at cadastral level, urban and rural infrastructure development and management, as well as applications in Land Information System (LIS).For detail, Please download the Document from here...
CARTOSAT-1
CARTOSAT-1 was launched into a 617 km polar sun synchronous orbit on May 5, 2005 on board PSLV-C6 from Satish Dhawan Space Centre (SDSC), SHAR, Sriharikota. The satellite carries two panchromatic cameras – PAN (fore) and PAN (aft) & with 2.5 meter resolution providing a swath of 30 km. The cameras are mounted with a tilt of +26 deg and -5 deg along the track with respect to nadir so as to provide stereo pairs of images that can be used to generate Digital Terrain Model (DTM) / Digital Elevation Model (DEM). The data from CARTOSAT-1 is used for the preparation of cartographic maps, cadastral mapping updation, land use and GIS applications. An onboard Solid State Recorder provides global data storage of areas not in the ground station visibility.For detail, Please download the Document from here...
RESOURCESAT-1
Resourcesat-1, the tenth satellite in IRS series, was launched on board PSLV-C5 in October 2003. It was placed in 820 km high polar Sun Synchronous Orbit. Resourcesat-1 carries three cameras:
A high resolution Linear Imaging Self Scanner (LISS-4) operating in three spectral bands in the Visible and Near Infrared Region (VNIR) with 5.8 metre spatial resolution and steerable up to + 26 deg across track to obtain stereoscopic images and achieve five day revisit capability.
A medium resolution LISS-3 operating in three spectral bands in VNIR and one in Short Wave Infrared (SWIR) band with 23.5 metre spatial resolution with 142 km swath.
An Advanced Wide Field Sensor (AWiFS) operating in three spectral bands in VNIR and one band. in SWIR with 56 metre spatial resolution and a combined swath of 730 km achieved through two AWiFS cameras.
In addition, RESOURCESAT-1 has 120 Gigabits of on-board memory that allows for out-of-contact imaging. The satellite has several improved features over its predecessors. These include availability of 5.8 m spatial resolution in 3 bands from LISS-IV camera, improved LISS III with MIR band information at 23.5 m resolution as with other Visible and NIR bands. In addition, the AWiFS provides data in the same spectral channels as LISS-III at about 56m resolution with 10-bit radiometry, 5-day revisit and scene coverage of 730 km for regional studies. Uniqueness of this satellite is the availability of simultaneous multispectral data at three spatial resolutions from the same platform with scene coverage varying from 576 sq km to 19,600 sq km to 5,42,000 sq km.
The images are being used for advanced applications like vegetation dynamics, crop yield estimates, disaster management support, etc.
IRS-1D
Launched in September 1997, IRS-1D carries three cameras–Panchromatic Camera (PAN), Linear Imaging Self Scanner (LISS-III) and Wide Field Sensor (WiFS). PAN has a spatial resolution of 5.8 metre and provides a swath of 70 km. LISS-III has a spatial resolution of 23.5 metre in VNIR and 70.5 metre in SWIR bands providing swaths of 142 km and 148 km respectively. WiFS has a spatial resolution of 188 m and a large swath of 810 km.
OCEANSAT-1
OCEANSAT-1, intended to study physical and biological aspects of oceanography, was launched onboard PSLV-C2 in May 1999. It carries an Ocean Colour Monitor (OCM) and a Multifrequency Scanning Microwave Radiometer (MSMR). OCM operates in 402-422, 433-453, 480-500, 500-520, 545-565, 660-689, 745-785 and 845-885 nm bands with 360 metre spatial resolution and 1420 km swath. Currently, OCM data is collected over the Indian region on an operational basis.
The National Remote Sensing Centre (NRSC) is the focal point for distribution of remote sensing satellite data products in India and its neighboring countries. NRSC has an earth station at Shadnagar, about 55Km from Hyderabad, to receive data from almost all contemporary remote sensing satellites. NDC is a one-stop-shop for range of data products with a wide choice of resolutions, processing levels, product media, out scales, area coverage, revisit, season and spectral bands. Data products can be supplied on a wide variety of media and formats.
