3.10 An earth-orbiting satellite has a period of 14 h and a perigee radius of 10,000 km. At time t = 10 h after perigee passage, determine (a) The radial position. (b) The speed. (c) The radial component of the velocity. {Ans : (a) 42 356 km: (b) 2.303 km/s: (c) –1.271 km/s}
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The radial position of a satellite in an elliptical orbit is given by,
Here a is the length of the semi-major axis, e is the eccentricity and θ path angle.
Speed of the satellite will be given by,
Here r is the radial position, μ is the standard gravitational parameter and a is the length of the semi-major axis.
The radial component of the speed will be given by,
Here h is the specific relative angular momentum of the orbit, μ is the standard gravitational parameter, e is the eccentricity, and θ path angle.
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