Question

Indian scientists developed the GSAT communication satellites that are used for digital audio, data and video broadcasting. As of mid-2019, ISRO has 15 of these geostationary satellites in operation, including 5 in the INSAT series. Apart from telecommunications,
these satellites have also proven useful in weather forecasting, disaster warning and search and rescue operations. Being geostationary, these satellites revolve in an orbit about 35,872 kilometres from the earth’s equator (where the earth’s radius is about 6,378 kilometres) and cover one revolution in about the same period as that of one earth rotation. These communication satellites are the pride of India’s advanced space
5

programme, among the most developed in the world and a huge jump from 1981 when the country’s first experimental communication satellite APPLE was launched.
(i) Assuming that a geostationary satellite moves in uniform circular motion around earth, what is the radius of this circular orbit?
a) 42,234 km b) 41,264 km c) 42,250 km d) 41,250 km
(ii) What is the orbital speed of the satellite (in km)? a) 4.54 km/s
b) 3.07 km/s
c) 4.09 km/s
d) 3.89 km/s

Answer 1

Answer:

Ariane Passenger PayLoad Experiment, APPLE was an experimental communication satellite successfully launched by Ariane-1, from Kourou, French Guiana on June 19, 1981, exactly 35 years back, marking an important milestone in India's space programme.

Answer 2

Answer:

• (i) b
• (ii) a

Explanation:

have a great day friend