Sem 8

Electronics and Telecommunications

Year 4

Fourth Year

`UNIT - 4`

`Orbital Mechanics and LauchersQ1) Write a short note on History of Satellite Communication? Q2) What is orbital mechanics? Explain briefly. Q3) Explain look angle determination. Q4) What are orbital perturbations? Q5) Explain the strategies in orbital determination. Q6) Explain briefly launchers and launch vehicle. Q7) Explain Doppler effect and range variations. Q8) Write a short note on eclipse and sun transit outrage. Q9) Find the elevation and azimuth calculation for geo satellite:Earth Station latitude 52 0 NEarth Station Longitude 00Satellite Lattitude 0oSatellite Longitude 66 0 EFind the central angle <img alt="" src="https://glossaread-contain.s3.ap-south-1.amazonaws.com/epub/1650900045_560471.png"/>.      Q10) Why is Doppler shift necessary? `