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Satellite Communication - Engineering

Q1:

Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.

A 28000

B 15000

C 36000

D 11100

ANS:D - 11100

Raduis of earth = 6400,
ht abve earth= 36000,
Total ht of Satlte from centre of earth = 6400+36000=42400km,
Distance traversed = perimeter=2πR = 2*3.14*42400.
Time= 24 hrs.
Speed= Distance/Time= (2*3.14*42400)/24 km/hr.