Why Geosynchronous orbit is preferred for communication satellite? Why GEO is near to French Guiana?

Answer 1

GEO sats are most preferred because it's always available due to it's stationary position. It is mostly used to cater for a specific region/area. However problem with geosats is high losses because they are situated way, way above the earth. Yet this problem is manageable.

Pertaining to Geosat near French Guiana: it probably caters within that region.

Answer 2

First I will answer your second q. Actually no orbit is near earth surface, It is over french guiana, means F guiana is located near equator, and GEO is cocentric (that is, to circles having same point as center) with equator, and the equatorial speed helps the payload to gain first cosmic velocity, (which is required velocity to be reach and stay in GEO).

The GEO is almost 36000 km high. At this height, the satellite can "cover" 120 degree of earth. So 3 will cover 360, ie complete earth. But communiation satelites can be in transfer orbit, or in any orit in any inclination, even in LEO. But they require more complexe algorithm for interaction and coherences etc. Commercially they are in GEO. Does that help you?

Answer 3

You have two answers.
The first question has been answered well by fellow Yahooian.
Satellite launch vehicles or simply 'rockets' are launched from French Guiana because, it is close to the equator where the orbital velocity of the earth will be more. Secondly, if the mission fails the spent materials would fall in to the Atlantic ocean and not into the urban lands.

Answer 4

there's a great form of room around the earth, so that is unlikely that a satellite tv for pc could hit yet another satellite tv for pc in orbit. additionally, for the reason that many satellites are geosynchronous, this suggests that they're going to stay contained in the comparable place above the earth; additionally reducing the probabilities of satellites hitting one yet another. The orbit of the satellite tv for pc is desperate by physics and arithmetic, to ascertain the factor above the earth the place the satellite tv for pc would be geosynchronous. As on your final question, satellites do no longer circumvent area debris, so some distance as i understand. i think that develop right into a situation with the Hubble Telescope contained in the previous.

Answer 5

Geosynchronous means that the satellite stays above a defined point on Earth all the time. (it rotate synchronously with Earth).
This allows for stable communications.
Geo and french guiana? what do you mean?

Answer 6

thr r 2 types of orbit.
1.polar
2.Geostationary
whn satellites r placed in a Geostationary orbit,it means tht th satellite wil b permanently in tht slot.2 b more prcise it takes th same time (24 hrs)to go around th earth.it is preferred 4 communication satellites coz it is important 4 fast exchange of signals.
but in polar orbit a satellite go around th earth and complete 1 round less or more than th time taken by earth.
regardin french guyana,r u sayin this coz india;s communicaton satellites r launchd from thr.thr is nothin lke GEO is near 2 guyana.now these satellites wil b launchd from india..

Answer 7

What (just "JR") said, his answer is right. My friend from Quebec doesn't speak the same kind of French that people from France speak but i asked him and he has no idea what your talking about, maybe you got a bad translation or something.