After the successful Chandrayaan-I moon mission, Indian Space Research Organization (ISRO) is now getting ready to launch two satellites Radar Imaging Satellite (RISAT) and ANUSAT.
ISRO is planning to launch these two satellites in March last week with the indigenously built Polar Satellite Launch Vehicle from the Sriharikota spaceport.
Indian space scientists see the 1,780-kg RISAT as a major milestone for the country as far as remote sensing satellites are concerned. RISAT mission would have a C-band Synthetic Aperture Radar (SAR) payload, operating in a multi- polarisation and multi-resolution mode.
SAR, being an active sensor, operating in the microwave range of electromagnetic spectrum, provides the target parameters such as dielectric constant, roughness, and geometry, and has the unique capability for day-night imaging, and imaging in all weather conditions including fog and haze, and also provide information on soil moisture.
So far, all satellites launched by ISRO are optical remote sensing satellites. But RISAT will have all other capabilities.
RISAT is capable of taking pictures during night as well and even in cloud-covered conditions, an expertise Indian remote sensing satellites did not have previously.
ANUSAT is a 50 kg micro satellite being designed and fabricated at Anna University, Chennai. The aim is to bring university based academicians and research and development experts of ISRO together to implement a project in university environment. ANUSAT carries a digital store and forward payload for amateur communication. In addition, a number of technological payloads like digital receiver and turbo coder and MEMS based gyro and magnetic field sensor are planned to be in this micro satellite.
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