A geostationary satellite is one

Why are geostationary satellites not useful for studies for polar regions? OR Explain the following statement. A geostationary satellite is not useful in the study of polar regions.

The orbital speed of geostationary satellite is around

A geostationary satellite has an orbital period of

The orbital speed of geostationary satellite is around

A period of geostationary satellite is

A period of geostationary satellite is