By Alvarinho J Luis
The author is a senior scientist at the National Centre For Polar And Ocean Research, Goa. email@example.com. The article should be cited as Luis Alvarinho J, 2019. Arctic and Antarctic from the Sky, Geography and You, 19(17): 42-47.
Remote sensing is a space-based satellite technique preferred for its repetitive coverage of inaccessible and rugged terrain for surface characterisation. This paper showcases climate change in the vulnerable polar realms by adapting different algorithms to the satellite technology to infer surface signatures.
Remote sensing (RS) is a tool for data acquisition through two primary techniques-active and passive. Active RS is employed during consistent cloud cover and darkness, where the sensor in orbit (eg., LIDAR and RADAR) sends its own signal and records the backscatter signal. During cloud free conditions however, the passive RS measures the radiation reflected from the surface, eliminating the need to send its own signals. Researchers working on polar areas use this data to study temporal sea ice concentration...