公开(公告)号：US11175370B1

公开(公告)日：2021-11-16

申请号：US16884516

申请日：2020-05-27

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Richard Schiffmiller ,  Eleanna Georgiadis

IPC: G01S3/42

Abstract: Techniques are provided for emitter geolocation. A methodology implementing the techniques according to an embodiment includes measuring phase differences between radar signals received at one or more pairs of antennas. The method also includes calculating hypothesized phase differences based on ray tracings from hypothesized emitter locations at a first set of grid points, to the antennas. The method further includes generating scores based on correlations between the measured phase differences and the hypothesized phase differences. The method further includes generating an error ellipse based on candidate grid points associated with scores that are above a threshold. The process may be repeated on a second set of grid points, bounded by the error ellipse, to generate a second set of scores. The grid point, from the second set of grid points, that is associated with the highest of the second set of scores is selected as the estimated emitter geolocation.

公开(公告)号：US20210373114A1

公开(公告)日：2021-12-02

申请号：US16884516

申请日：2020-05-27

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Richard Schiffmiller ,  Eleanna Georgiadis

IPC: G01S3/42

Abstract: Techniques are provided for emitter geolocation. A methodology implementing the techniques according to an embodiment includes measuring phase differences between radar signals received at one or more pairs of antennas. The method also includes calculating hypothesized phase differences based on ray tracings from hypothesized emitter locations at a first set of grid points, to the antennas. The method further includes generating scores based on correlations between the measured phase differences and the hypothesized phase differences. The method further includes generating an error ellipse based on candidate grid points associated with scores that are above a threshold. The process may be repeated on a second set of grid points, bounded by the error ellipse, to generate a second set of scores. The grid point, from the second set of grid points, that is associated with the highest of the second set of scores is selected as the estimated emitter geolocation.