US 6,982,668 B1
Tangential velocity measurement using interferometric MTI radar
Armin W. Doerry, Albuquerque, N. Mex. (US); Brian P. Mileshosky, Albuquerque, N. Mex. (US); and Douglas L. Bickel, Albuquerque, N. Mex. (US)
Assigned to Sandia Corporation, Albuquerque, N. Mex. (US)
Filed on Sep. 30, 2003, as Appl. No. 10/675,328.
Int. Cl. G01S 13/524 (2006.01)
U.S. Cl. 342—160 28 Claims
OG exemplary drawing
 
1. A method for measuring the tangential velocity of a moving target, comprising:
a) collecting data over a coherent processing interval using at least two antennas assigned to a MTI radar system, wherein data includes range position and radial velocity of the moving target;
b) performing interference using the data associated with said at least two antennas, thereby identifying the azimuth position of the moving target;
c) identifying any phase shift that may exist between said at least two antennas; and
d) identifying the azimuth velocity of the moving target based on the phase shift properties over time.