# Geostationary satellite-What proportion of the satellites data capacity is used?

• Dec 30th 2009, 10:54 AM
Ross
Geostationary satellite-What proportion of the satellites data capacity is used?
This is my first post, hope I have got it in the right topic area.

A geostationary satellite orbits the earth at a height of 36,000 km, the data rate available to and from the satellite is 100 kB/s. If transmitting 1000 bit frames using a one-bit sliding window protocol, what proportion of the satellite link's data capacity is used? (Assume the speed of light is 300,000 km/s.
• Dec 31st 2009, 06:14 AM
Ross
I didn’t want to include any part of my attempt at the question in the first post because I wanted to see someone else’s working out from start to finish but I will on this occasion to get the ball rolling and show that I have attempted this question.

36,000*2=72,000
Time = distance/speed
72,000/300,000
=0.24 of a second, 120 milliseconds each way

Feel free to continue this question where I have left off or correct anything I have done above because I am not 100% sure on anything about this question.