ISRO and NASA are joining hands to develop advance space-based sensors that can help sharpen earth observation applications, according to Tapan Misra, Director of the Ahmedabad-based, Space Application Centre (SAC). The joint venture, called NISAR, will focus on making sensors in the L&S-band. They can help in observations such as deformations on land surface, details of coastline and depths of ocean to aid in disaster response, he said, while delivering a lecture organized by the Aeronautical Society of India (ASI) and Sensors Research Society of India here. The SAC will take the lead in developing C-band radar imaging as well as in making microwave and optical sensors which have a big role in the future.