RISAT: first planned SAR mission of ISRO

Tapan Misra; S. S. Rana; R. N. Tyagi; K. Thyagarajan

doi:10.1117/12.697402

30 November 2006 RISAT: first planned SAR mission of ISRO

Tapan Misra, S. S. Rana, R. N. Tyagi, K. Thyagarajan

Proceedings Volume 6407, GEOSS and Next-Generation Sensors and Missions; 64070J (2006) https://doi.org/10.1117/12.697402
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

SAR Payload of RISAT (Radar Imaging Satellite), the first SAR satellite from ISRO, is currently under development. This payload is based on active antenna technology, and it supports variety of resolution and swath requirements in C-band. Both conventional stripmap and scanSAR modes are supported with dual polarization operation. Additionally a quad polarization stripmap mode is provided for availing additional resource classification. In all these modes resolutions from 3m-50 m can be achieved with swath ranging 30 km -240 km. On experimental basis, a sliding spotlight mode is also available. The payload hardware is organized in such a way that that co and cross polarization images are available for any operating modes. Additionally, a quad polarization mode is also supported. Active array configuration of this payload called for development of many new technologies ranging from MMICS, TR modules, miniaturised power supplies, high speed digitisers, dual polarized printed antenna and distributed control systems. A completely new bus is being designed for aiding the payload operation. The RISAT spacecraft is configured around the payload to minimize the spacecraft weight, suitable for launching by ISRO's PSLV launcher. RISAT will be placed on dawn to dusk sunsynchronous polar orbit to ensure maximum solar power availability. All the basic building blocks have already crossed design stage and have undergone rigorous space qualification program. Presently a complete SAR with one tile has been integrated as design verification model and is under rigorous testing. This development ensured demonstration of end to end hardware, on-board control software and beam control behavior.

Citation Download Citation

Tapan Misra, S. S. Rana, R. N. Tyagi, and K. Thyagarajan "RISAT: first planned SAR mission of ISRO", Proc. SPIE 6407, GEOSS and Next-Generation Sensors and Missions, 64070J (30 November 2006); https://doi.org/10.1117/12.697402

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available