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If the Earth’s central angle is 58.3 deg and the angle of elevation for a satellite is 8.9 deg, then what is the value of the nadir angle?

If the Earth’s central angle is 58.3 deg and the angle of elevation for a satellite is 8.9 deg, then what is the value of the nadir angle? Correct Answer 22.8 deg

Given, λ = 58.3 deg, ε = 8.9 deg The nadir angle is given from the relatioλ = 90 – η – ε as shown in the figure. Nadir angle is the angle of the subsatellite point which is to the edge of the field of view. 58.3 = 90 – η -8.9 η = 22.8 deg

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