A commemorative postage stamp on the Completion of 3 years in Orbit of IRS–1A :
Issued by India
Issued on Mar 18, 1991
Issued for : Deptt. of Posts is privileged to issue a special stamp on the completion of three years in orbit of IRS-1A.
Description of Design : The stamp and the First Day Cover are based on art works provided by ISRO. The stamp depicts IRS–1A in orbit. The First Day Cover depicts INSAT Master Control Facility at Hasan. Cancellation is designed by Ms. Nenu Gupta.
Type : Stamp, Postal Used
Colour : Two Colour
Denomination : 650 Paise
Overall size : 4.06 x 2.41 cms.
Printing size : 3.70 x 2.05 cms.
Perforation : 13 x 13
Paper : Indigenous Un W/M Gravure Coated Adhesive Stamp Paper
Number printed : 10,00,000
Number per issue sheet : 45
Printing Process : Photogravure
Printed : India Security Press
- The 975 kg satellite carries two advanced cameras, Linear Imaging Self–scanning Sensors, LISS – I and LISS – II, with spatial resolutions of 72.5 m and 36.25 m respectively. LISS – I provides a swath of 148 km and the two LISS – II cameras provide a composite swath of 145 km. The satellite, built with totally indigenous capability, incorporates most advanced technologies including driven deployable sun-tracking solar panels, three-axis body stabilisation using dry turned gyros, reaction wheels, scanning sensors and reaction control system, high bit rate image transmission, automatic payload operation, etc.
- IRS–1A, is controlled through a set of complex on-orbit manoeuvres to maintain it in the specified 904 km polar sun-synchronous orbit. The satellite returns to its original orbit trace every 22 days enabling repeated collection of data at the same place and at the same local time. The Spacecraft Control Centre in Bangalore, along with ground stations at Lucknow and Mauritius, regularly track, monitor and control the spacecraft. The National Remote Sensing Agency (NRSA), Hyderabad receives the data from IRS-1A in S-band and X-band and the data is disseminated to more than 500 users in the country.
- Text : Courtesy ISRO Bangalore.