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NOTE: I am not a radar engineer. This is my opinion Given that the "MV" mode has a fixed, known scan pattern, the average phase of the ground clutter return will vary with the speed of the host aircraft. If you therefore take the average of a number of ground clutter returns over a reasonably short period of time, during which the velocity and altitude of the host aircraft can be regarded as constant, the average phase shift is likewise constant (hence 'time-averaged clutter coherent'). This defines a baseline "ground return" which you can compare to any individual returned pulse. A return from a moving target that is moving significantly differently from the ground will be a "spike" away from this 'average noise'.PaulP90Source:David K. Barton & Sergey A. Leonov, eds, Radar Technology Encyclopedia, Artech House, 1998
NOTE: I am not a radar engineer. This is my opinion
Given that the "MV" mode has a fixed, known scan pattern, the average phase of the ground clutter return will vary with the speed of the host aircraft. If you therefore take the average of a number of ground clutter returns over a reasonably short period of time, during which the velocity and altitude of the host aircraft can be regarded as constant, the average phase shift is likewise constant (hence 'time-averaged clutter coherent'). This defines a baseline "ground return" which you can compare to any individual returned pulse. A return from a moving target that is moving significantly differently from the ground will be a "spike" away from this 'average noise'.
Paul
P90
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