Ashok asked his father about remote sensing satellites which are used to get information of places which can't be reached directly.
a) What values do you associate with Ashok ?
b) A remote sensing satellite of the earth in a circular orbit at a height of 400km above the surface of earth.
1. What is the orbital speed and period of revolution of satellite ? What kind of orbit does remote sensing satellite follow ?

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Solution

$D e a r S t u d e n t, a . A s h o k i s v e r y c u r i o u s t o s t u d y t h e l a t e s t t e c h n o l o y . b . r e m o t e s e n \sin g s a t e l l i t e f o l l o w t h e p o l a r o r b i t . r a d i u s o f o r b i t r = 6400 + 400 = 6800 k m = 6.8 * 10^{6} m v = \sqrt{\frac{G M}{r}} = \sqrt{\frac{6.63 * 10^{- 11} * 6 * 10^{24}}{6.8 * 10^{6}}} = \sqrt{\frac{6.63 * 10^{- 11} * 6 * 10^{24}}{6.8 * 10^{6}}} = 2.42 * 10^{7} m / s R e g a r d s$

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