CBSE (UGC) NET Paper 1: Follow-On Satellites For Earth Observation IRS-P6 (RESOURCESAT-l)

Follow-On Satellites For Earth Observation IRS-P6 (RESOURCESAT-l)

IRS-P6 (RESOURCESAT-l) is launched by PSLV in 2002 − 03. It will carry the payloads, which are stated below:

IRS-P6 will not only provide service continuity to IRS-1C and IRS-IO but also enhance the service capabilities in the areas of agriculture, disaster management, land and water resources, with better resolution imageries. mS-P5 (CARTOSAT-1), lRS-P5 is launched by PSLV in 2003 − 04. The satellite is primarily intended for advanced cartographic applications. IRS-P5 will have two panchromatic cameras on board with 2.5 m resolution with a swath of 30 km each. These cameras are mounted with a tilt of + 26 deg and-5 deg with the track with respect to nadir to provide stereo pairs of images needed for the generation of Digital Terrain Model (OTM)/Digital Elevation Models (OEM) of the required regions. The data products will be used for cartographic applications, cadastral mapping and updating, land use and other GIS applications. The satellite has a revisit capability of 5 days, which can be realised by steering the spacecraft about roll axis by 26 degrees. During tbe year tbe equipment panel design bas been finalised. Various components are under development and testing. Ground Segment: The ISRO Telemetry, Tracking and Command Network (ISTRAC) monitors and controls aU the IRS satellites besides other low earth orbit satellites. ISTRAC has a network of ground stations located at Bangalore, Sriharikota, Port Blair. Thiruvanantapuram, Mauritius and Bearslake with multi-mission Spacecraft Control Centre at Bangalore. Currently, TIC stations at Brunei and Biak have also added. ISTRAC. At present tra. Cks, monitors and controls IRS-IC, IRS-ID, IRS-P3, JRS-P4 and TES. ISTRAC was ultimately used for organising various demonstrations on TES. Payload operations on IRS-IC and IRS-ID are carried out over the Inman stations at Shadnagar in India as well as foreign data reception stations at Fairbank (USA), Seoul, Korea, Cotopaxy (Ecuador), Dubai, NeustraJitz (Germany), Norman (USA), Tokai (Japan) and Riyad (Saudi Arabia).

On an average about 350 to 400 payload operations are being operated per month. IRS-P3 payload operations are operated for about 250 times per month over Shadnagar in India, Neustralitz and Wallops (Germany) and Maspolamas (Spain).

  1. A multi-spectral camera USS-3 giving 23.5 m spatial resolution in four spectral bands with a swath of around 140 km.

  2. A high resolution multi-spectral camera LISS-4 giving 5.8 m spatial resolution operating in three spectral bands.

  3. An Advanced Wide Field Sensor (A WiFS) with spatial resolution better than 70 m in three spectral bands and giving a swath of 740 km.