1. A method of reducing an impairment to a tracking signal for a directional antenna system due to interference from an adjacent transponder, comprising: scanning a directional antenna in a scan path to produce a received signal strength indicator (RSSI) signal; detecting coherently said RSSI signal to produce an RSSI image; performing a morphologic estimate of said RSSI image based at least in part on a morphologic feature of said RSSI image to produce a normalized tracking correction; and outputting said normalized tracking correction to the directional antenna system.