In fact, objects emit energy at the microwave frequencies, although sometimes in an extremely small amount.

Microwave Remote Sensing Applications Training Focus: Multi date SAR FCC ( April 22 - May 3, 2019 ) The launch of the first Indian active microwave remote sensing satellite, Radar Imaging Satellite (RISAT-1), has opened up new vistas for operational utilisation of microwave data for management of natural resources and disaster management. The next decade could see several improved operational and exploratory missions using new technologies as well as innovative disaggregation and data fusion approaches that could lead the way to an order of … RISAT-1 carries a multi … 8 in providing global remote sensing coverage. These systems are generally characterized by relatively low spatial resolutions. This lesson introduces microwave products available from JPSS and other polar and low Earth orbiting satellites that depict clouds, atmospheric moisture and precipitation through the use of passive microwave sensing instruments. Land applications, in particular soil moisture retrieval, have been hampered by the lack of low frequency passive microwave observations and the coarse spatial resolution of existing sensors.

Microwave Remote Sensing Applications (04 – 15 May, 2020) The launch of the first Indian active microwave remote sensing satellite, Radar Imaging Satellite RISAT-1, has opened up new vistas for operational utilization of microwave data for management of natural resources and Disaster management. This is an advantage that is not possible with the visible and/or infrared remote sensing. Active microwave sensors provide their own source of microwave radiation to illuminate the target The most common form of imaging active microwave sensors is RADAR. Microwave remote sensing, using microwave radiation using wavelengths from about one centimeter to a few tens of centimeters enables observation in all weather conditions without any restriction by cloud or rain. Microwave remote sensing systems are classified into two groups: passive and active.

Microwave remote sensing instruments acquire data useful for geophysical investigations by measuring signals arising due to interaction of microwaves with natural media. Passive systems collect the radiation that is naturally emitted by the observed surface. Applications of passive microwave remote sensing include meteorology, hydrology, and oceanography Passive microwave sensing 6 7. This presents a major impediment to the application of optical remote sensing discussed in Chap.

RISAT-1 is the first indigenously developed Microwave satellite. Moreover, other than thermal sensors, most other optical imaging technologies best operate during day time when there is sufficient sunlight.