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______ is the error in determining position relative to an earth referenced coordinate system?

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______ is the error in determining position relative to an earth referenced coordinate system?

(a) Absolute error

(b) Repeatable error

(c) Relative error

(d) Differential error

I had been asked this question during an interview.

Enquiry is from Radio Propagation and Noise Characteristics in division Terrestrial Radio Navigation System of Avionics

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Right answer is (a) Absolute error

Easy explanation: The absolute or predictable error is the error in determining position relative to an earth referenced coordinate system. The earth frame is one such coordinate system that has its origin at the Earth’s center of mass and its axes fixed on Earth.

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