FCC Exam Question: 3-96P2

Which of the following describes the INMARSAT Satellite system?

A. AOR at 35 W, POR-E at 165 W, POR-W at 155 E and IOR at 56.5 E.
B. AOR-E at 25 W, AOR-W at 85 W, POR at 175 W and IOR at 56.5 E.
C. AOR-E at 15.5 W, AOR-W at 54 W, POR at 178 E and IOR at 64.5 E.
D. AOR at 40 W, POR at 178 W, IOR-E at 109 E and IOR-W at 46 E.
Correct Answer: C

Explanation: The INMARSAT (International Mobile Satellite Organization) system utilizes geostationary satellites positioned above the equator to provide global mobile satellite communications. Each satellite is strategically placed to cover a specific ocean region. Option C correctly lists the approximate historical and commonly tested orbital positions for these regions: * **AOR-E (Atlantic Ocean Region-East)**: 15.5° W * **AOR-W (Atlantic Ocean Region-West)**: 54° W * **POR (Pacific Ocean Region)**: 178° E * **IOR (Indian Ocean Region)**: 64.5° E These specific longitudes ensure continuous, reliable coverage over their designated areas. Options A, B, and D present incorrect longitudes or an incorrect naming convention for one or more of these established satellite positions. Knowing these approximate geostationary locations is a fundamental aspect of understanding global satellite communication systems like INMARSAT for amateur radio operators.

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Includes Elements 1, 3, 6, 7R, 8, and 9.