21. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
22. Which one of the following parameters is accurate for DGPS?
23. Which one of the following errors is produced by platform characteristics of the sensor?
24. If electric permittivity and magnetic permeability of the medium are respectively ‘ε’ and ‘μ’, then the velocity (Cm) of the electromagnetic wave in the medium is given by:
25. The altitudinal distance of a geostationary satellite from the earth is about:
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