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According to the space agency, the satellites became unusable after the SSLV-D1 placed them in an elliptical orbit instead of a circular one.
The earth observation satellite would provide real-time images of the country and also be able to quickly monitor natural disasters.
Accurate temperature records extend into the 19th century, starting around 1880.
The RISAT-2B (Radar Imaging Satellite-2B), is meant for application in fields such as surveillance, agriculture, forestry and disaster management support.
This is the 44th flight of PSLV and 13th one in the 'Core Alone' mode, sans the solid strap-on motors.