Problem 1. (10 points) 1. The power flux density of GPS signals available to use

Question

Problem 1. (10 points) 1. The power flux density of GPS signals available to users on the surface of Earth Watts/m2. is approximately 2. The CTRS is Earth-fixed. 3. The tangent axes system is Earth-fixed. 4. The tangent axes system is inertial 5. The CIRS is Earth-fixed. 6. The angular velocity of the tangent axes system relative to CTRS is True True True True False False False False rad/s. 7. The angular velocity of CTRS relative to CIRS, with coordinates in CTRS, is rad/s. 8. According to WGS 84, the length of the semi-minor axis of the global datum ellipsoid (Earth's approximate shape) is km 9. An accelerometer on a gimbaled platform measures: Inertial acceleration in an inertial coordinate system O Inertial acceleration in a body-fixed coordinate system Proper acceleration in an inertial coordinate system O Proper acceleration in a body-fixed coordinate system 10. An accelerometer in free fall measures m/s2

Explanation / Answer

1. -200 db

2. True

8. 6378137.0m

10. 0 (zero) because when it is freely faling, there is no action of earth gravity in the upward direction

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