Radar Imaging With India’s <i>Earth Observation Satellite-04</i>: Earth resource monitoring using C-band synthetic aperture radar system

India launched the C-band synthetic aperture radar (SAR) satellite <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Earth Observation Satellite</i> (<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">EOS</i>)<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</i> on 14 February 2022. The payload, operating at 5.4 GHz, is a state-of-the-art sensor, and the improved data products give the user community a set of data that can address research as well as operational user requirements. A lot of applications have been made operational over the Indian region as well as Antarctica by the Indian science community. Here, we showcase the utilization of <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">EOS-4</i> data related to various global applications, such as agriculture, forest, soil moisture (SM), hydrology, cryosphere, geoscience, oceanic, and coastal applications. Since the data are made globally available, the global user community can address its data needs from a SAR sensor, where full hybrid and dual polarizations are available from electronically steerable beams. At a 17-day revisit time, the satellite takes care of many applications that need closer observations. The satellite has capabilities to address almost all the requirements of the user community, with repeat-pass interferometry being introduced on an experimental basis.