Question

why are geostationary satellites not useful for studies of polar region ? point wise​

Answer 1

Geostationary - The satellite is aligned with earth's equator and placed in the space over the host country .

✔This satellite travels at the same speed as that of the earth's speed of revolution.
✔This satellite orbits the earth .
✔Since the earth and the satellite have exactly the same speed the satellite appears to be stationary from the earth .
✔In reality it orbits the earth and is always on the move .

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