a GPS transmitter is 19800 km above the surface of the earth and transmitting at power 30w. Calculate the received power in (Watts per square meter) of a GPS receiver on the surface of the earth
What is the surface area formula for a sphere? Look it up in your Math Textbook. But calculating the radius, you have to add the radius of the Earth + 19,800 km. Then you have to convert that number into meters.
Once you determine the SA, then you divide 30 Watts by that SA and that would your answer would be in Watts /m^2.
