45795-UlabyISMCh10

# 45795-UlabyISMCh10 - 448 Chapter 10 Satellite Communication...

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448 Chapter 10: Satellite Communication Systems and Radar Sensors Lesson #70 and 71 Chapter — Section: 10-1 to 10-4 Topics: Communication systems Highlights: Geosynchronous orbit Transponders, frequency allocations Power budgets Antennas Lesson #72 and 73 Chapter — Section: 10-5 to 10-8 Topics: Radar systems Highlights: Acronym for RADAR Range and azimuth resolutions Detection of signal against noise Doppler Monopulse radar

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CHAPTER 10 449 Chapter 10 Sections 10-1 to 10-4: Satellite Communication Systems Problem 10.1 A remote sensing satellite is in circular orbit around the earth at an altitude of 1,100 km above the earth’s surface. What is its orbital period? Solution: The orbit’s radius is R 0 R e h 6 378 1 100 7478 km. Rewriting Eq. (10.6) for T : T 4 π 2 R 3 0 GMe 1 2 4 π 2 7 478 10 6 3 6 67 10 11 5 98 10 24 1 2 4978 45 s 82 97 minutes. Problem 10.2 A transponder with a bandwidth of 400 MHz uses polarization diversity. If the bandwidth allocated to transmit a single telephone channel is 4 kHz, how many telephone channels can be carried by the transponder?
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