Model the Earth as a sphere of radius R. If two antennas are both at height h above the ground, at what distance r does the ground block the "line of sight" between them? If R = 6,371 km and h = 10 m, what is r? If R = 6, 371 km and r = 100 km, what is h? Solve for both values to the nearest meter. h Earth R h

Delmar's Standard Textbook Of Electricity
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ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter14: Basic Trigonometry And Vectors
Section: Chapter Questions
Problem 1RQ: 1. Which trigonometric function is used to find the angle if the length of the hypotenuse and of the...
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Model the Earth as a sphere of radius R. If two antennas are both at
height h above the ground, at what distance r does the ground block
the "line of sight" between them?
If R = 6, 371 km and h = 10 m, what is r? If R = 6, 371 km and
r = 100 km, what is h? Solve for both values to the nearest meter.
Propagation model for the next two problems:
PR.dBm
To
Po,dBm
=
Po,dBm - 20 log
Po,dBm - 40 log
2πhthr
T
To
r
To
r< ro
rz ro
PT, dBm + GT,dB + GR,dB - 20 log
h
2πro
X
r
Earth
R
h
Transcribed Image Text:Model the Earth as a sphere of radius R. If two antennas are both at height h above the ground, at what distance r does the ground block the "line of sight" between them? If R = 6, 371 km and h = 10 m, what is r? If R = 6, 371 km and r = 100 km, what is h? Solve for both values to the nearest meter. Propagation model for the next two problems: PR.dBm To Po,dBm = Po,dBm - 20 log Po,dBm - 40 log 2πhthr T To r To r< ro rz ro PT, dBm + GT,dB + GR,dB - 20 log h 2πro X r Earth R h
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