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Monopulse Radar Air-ti-Ground Ranging

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1 Author(s)
McGillem, C.D. ; School of Electrical Engineering, Purdue University Lafayette, Ind.

The use of a two-lobe monopulse radar for measuring slant range to the surface of the earth in the absence of discrete targets is analyzed. It is shown that tracking dispersion can be considered as the resultant of two components. One component is independent of range and results from the finite pulse length and gate length and the random nature of the return signals. The other component is due to receiver noise and increases as the signal-to-noise ratio decreases. The dispersion component independent of range is shown to be proportional to the pulse length and tracking gate length. The variable dispersion is shown to be proportional to the five halves power of the range and the three halves power of the cotangent of the depression angle of the antenna boresight axis. Performance calculations for a specific radar are carried out and compared with experimental data.

Published in:

Aerospace and Electronic Systems, IEEE Transactions on  (Volume:AES-2 ,  Issue: 3 )