Communications satellite interference location system

A system for determining the location of an interference signal received by a communications satellite, said communications satellite having an earth facing panel, said system comprising:

• an antenna array having at least three antennas, said array located on said earth facing panel for receiving said interference signal, at least two antennas of said antenna array defining a horizontal baseline and at least two antennas of said antenna array defining a vertical baseline orthogonal to said horizontal baseline;
• means for generating a reference signal whereby said reference signal has periodic null points;
• means for detecting said periodic null points in said reference signal;
• a timer connected to said means for detecting said periodic null points in said reference signal whereby said timer begins timing when said periodic null point in said reference signal is detected;
• means for introducing a phase shift between said interference signal received at both of said at least two antennas on one of said baselines;
• means for summing said shifted signals received at said at least two antennas defining a composite signal;
• means for detecting a null point in said composite signal, said timer connected to said means for detecting a null point in said composite signal whereby said timer is stopped when said null point in said composite signal is detected, the amount of time between said null point in said reference signal and said null point in said composite signal defines a linear phase rate;
• means for calculating an angle of arrival for said interference signal based on said reference signal and said linear phase rate.