Distinguish between

a$)$ Broadcast ephemerides and Precise ephemerides

b$)$ DGPS and RTK method of GNSS surveying

c$)$ Doppler Principle and Doppler count

d$)$ Regional Geoid Model Development using GNSS observations.

You have obtained your navigated position using Juno$3$B GNSS receiver. Write down

the various transformations involved in converting the GPS satellite position from the

broadcast message to its navigated position. Use neat diagrams to explain each

transformation.

ISRO GSAT$-15$ Communication satellite, carrying GAGAN payload was launched by

India from French Guiana in the early morning of ${11}^{th}$ November $2015.$ Compute $($and do not

copy from any other source$)$ its altitude from the Earth to perform the task it was allotted?

Discuss the various Keplerian elements of this satellite with a neat diagram. $($Given the value

of GM as $3986005{10}^{**}8m^{**}3S^{**}-2)$