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Sec. 8–6 Link Budget Analysis 615<br />

20.7<br />

22.7<br />

24.7<br />

26.7<br />

27.7<br />

36.7<br />

35.7<br />

34.7<br />

32.7<br />

30.7<br />

28.7<br />

26.7<br />

22.7<br />

20.7<br />

37.7<br />

Vertical transmit<br />

22.7<br />

26.7<br />

27.7<br />

28.7<br />

29.7<br />

37.7<br />

36.7<br />

35.7<br />

34.7<br />

32.7<br />

26.7<br />

30.7<br />

28.7<br />

22.7<br />

38.7<br />

Horizontal transmit<br />

Figure 8–25 Typical C-band TVRO satellite EIRP footprint in dBw units. (Google “Satellite<br />

Footprints” for current satellites.) [Courtesy of Intelsat S.A.]<br />

d = 3(R + h) 2 + R 2 - 2R(R + h) cos b<br />

The azimuth of the TVRO antenna is<br />

A = cos -1 a- tan w<br />

tan b b<br />

(8–49)<br />

(8–50)

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