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SAR Interferometry 

The co-ordinated programme on SAR interferometry is being promoted through the active participation of several academic institutions, since 1999 and efforts are being continued in further expanding and streamlining the research activities. The objective has been promoting research on the applicability of Microwave Remote Sensing & SAR interferometry for the generation of high resolution Digital Elevation Model as well as its applicability in the assessment of Earth surface changes occurring as a consequence of natural processes like - glacial dynamics and landslides, as well as anthropogenic causes like, surface mining, subsidence due to underground mining and soil erosion, crop growth etc. 

An Indian InSAR group was formed in 1999 for bringing together scientists interested in this area of technology at CSRE IIT, Bombay. Supported the Organisation of an International Seminar in January 1999, wherein 100 scientists from India and 15 international experts from 12 countries participated to share their views on the relevance of this emerging technology in various application areas. The major activities of this sub-programme are : 

* Introduction of the technology amongst the Indian scientific community through    the organisation of training workshops
* Creation of State of the Art facilities at participating institutions through    procurement of SAR processing softwares (GAMMA, DIOPSON, Earth View, 
* EPSIE-2000 and other newer softwares) and computer systems with appropriate    processing speed and capacity. 
* Support participation in Global level programmes such as, 
   * Field truth collection synchronous with Shuttle Radar Topographic Mission in        February 2000.
    * Indo-Italian joint programme on “SAR Simulator” development. 
* Support R&D Studies on application of SAR Interferometry in several different          areas of developmental planning such as: 
   * High Resolution DEM generation 
   * Applicability in Structural mapping 
   * Glaciology 
   * Biomass estimation 
   * Soil erosion 
   * Coastal area surface deformation arising from tidal loading 
   * Critical area identification for directing developmental planning 
   * Monitoring of Drought and Irrigation scheduling 

NRDMS therefore is trying to evaluate, refine and demonstrate the efficacy of this technology so that it could be made operational in due course of time to - 
(i) capture the height information in areas that are inaccessible,
(ii) direct the process of developmental planning, 

While, the first phase of activity like - Introduction to the technology, capacity building, have been completed, the division is now embarking on facility creation, support R&D activity using the trained manpower to refine the techniques and develop indigenous tools, with the aim of making this technology a potential operational tool in the hands of the Indian scientific community. 

The Expert Committee of NRDMS reviews this programme to ensure that the potential of this technology is fruitfully used in local level development planning.