Single site geolocation method for a linear array

The problem addressed is that of high frequency (HF) single site location (SSL) using a linear array, where the signal of interest propagates beyond the line of sight via the sky-wave mode. The paper proposes a new geolocation method that exploits multipath to resolve the “coning” ambiguity in a linear array. For the first time, this opens up the possibility to perform meaningful HF-SSL using a linear array. The proposed method is also applicable to traditional HF-SSL systems based on two-dimensional apertures. In this case, the advantage is reducing estimation errors as opposed to resolving an ambiguity. Experimental data with known ground truth on a HF source is used to validate the method.