Passive Geolocation Using TDOA Method from UAVs and Ship/Land-Based Platforms for Maritime and Littoral Area Surveillance

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Authors
  1. Du, H-J.
  2. Lee, J.P.Y.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
Passive geolocation of radar emitters remains an important problem in electronic support (ES) for maritime and littoral surveillance. Several location methods have been investigated in the past. This report presents passive geolocation of radar emitter using the time difference of arrival (TDOA) location method from Unmanned Aerial Vehicles (UAVs) working in conjunction with ship/land-based platforms to fulfill maritime and littoral area surveillance. Instead of using multiple stationary sensors, multiple TDOA measurements are obtained over time intervals from UAV-based sensors along UAV flight trajectories. A simple least-squares (LS) solution is derived based on TDOA measurements and known sensor locations to solve three-dimensional (3-D) location estimation. The proposed location method takes into account of both TDOA measurement noise and bias. Therefore, the location estimation can be achieved more accurately when biased measurements are present. The advantages and effectiveness of the proposed method are demonstrated using computer simulation.

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Keywords
Geolocation;Time difference of arrival;Nonstationary;Geolocation;Three-dimensional (3-D) location estimation;TDOA (Time Difference of Arrival)
Report Number
DRDC-OTTAWA-TM-2004-033 — Technical Memorandum
Date of publication
01 Feb 2004
Number of Pages
32
DSTKIM No
CA023828
CANDIS No
521218
Format(s):
Hardcopy;CD ROM

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