Holooly Plus Logo
Holooly Plus Logo

Question 14.1: An earth station is located in Houston, Texas, which has a l......

An earth station is located in Houston, Texas, which has a longitude of 95.5°W and a latitude of 29.5°N. The satellite of interest is RCA’s Satcom 1, which has a longitude of 135°W. Determine the azimuth angle and elevation angle for the earth station.

Step-by-Step
The 'Blue Check Mark' means that this solution was answered by an expert.
Learn more on how do we answer questions.
Report Answer

First determine the difference between the longitude of the earth station and the satellite vehicle:
ΔL = 135° − 95.5°
= 39.5°
Locate the intersection of ΔL and the earth station’s latitude on Figure 12. From the figure, the azimuth angle is approximately 59° west of south (i.e., west of 180°). On Figure 13, locate the intersection of ΔL and the earth station’s latitude. The angle of elevation is approximately 35°.

ch14_figure12
ch14_figure13

Related Answered Questions

Question: 14.8

Complete the link budget for a satellite system with the following parameters. Uplink 1. Earth station transmitter output power at saturation, 2000 W 33 dBW 2. Earth station back-off loss 3 dB 3. Earth station branching and feeder losses 4 dB 4. Earth station transmit antenna gain (from Figure 27, ...

Verified Answer:

Uplink budget: Expressed as a log, EIRP (earth sta...
Question: 14.7

A coherent 8-PSK transmitter operates at a bit rate of 90 Mbps. For a probability of error of 10^-5, a. Determine the minimum theoretical C/N and Eb/N0 ratios for a receiver bandwidth equal to the minimum double-sided Nyquist bandwidth. b. Determine the C/N if the noise is measured at a point prior ...

Verified Answer:

a.  8-PSK has a bandwidth efficiency of 3 bps/Hz a...
Question: 14.6

A coherent binary phase-shift-keyed (BPSK) transmitter operates at a bit rate of 20 Mbps. For a probability of error P(e) of 10^-4, a. Determine the minimum theoretical C/N and Eb/N0 ratios for a receiver bandwidth equal to the minimum double-sided Nyquist bandwidth. b. Determine the C/N if the ...

Verified Answer:

a.  With BPSK, the minimum bandwidth is equal to t...
Question: 14.2

For a total transmit power (Pt) of 1000 W, determine the energy per bit (Eb) for a transmission rate of 50 Mbps. ...

Verified Answer:

T_{b}=\frac{1}{f_{b}}=\frac{1}{50\,×\,10^{6...
Question: 14.5

For an equivalent noise bandwidth of 10 MHz and a total noise power of 0.0276 pW, determine the noise density and equivalent noise temperature. ...

Verified Answer:

Substituting into Equation 12, we have T_{e...
Question: 14.4

Convert noise figures of 4 dB and 4.1 dB to equivalent noise temperatures. Use 300 K for the environmental temperature. ...

Verified Answer:

Converting the noise figures to noise factors yiel...
Question: 14.3

For an earth station transmitter with an antenna output power of 40 dBW (10,000 W), a back-off loss of 3 dB, a total branching and feeder loss of 3 dB, and a transmit antenna gain of 40 dB, determine the EIRP. ...

Verified Answer:

Substituting into Equation 6 yields EIRP = ...