Track retrodiction for HFSWR

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Authors
  1. Ding, Z.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
In this report, we explore the possibility of track retrodiction to improve the track performance when a radar’s track output rate can be reduced and delayed. In the case of High Frequency Surface Wave Radar (HFSWR), the output rate may be reduced to half an hour, instead of its regular update rate of about four minutes. This allows us to accumulate seven frames of data to optimize the track output. To make use of the extra multi-frame data, we borrow the Rauch-Tung-Striebel (RTS) algorithm for the track retrodiction purpose. Using a converted extended Kalman filter (CMEKF) as the baseline, its retrodicted version, namely the retrodicted CMEKF, shows a significant improvement in performance. Monte Carlo simulation is used to verify the effectiveness of this technique. Analysis shows that the position root mean squared error (RMSE) is reduced by 30% and the RMSE in velocity is reduced by 25% when seven frame retrodiction is used. Beyond 10 frames, the reduced RMSE becomes negligible, which means that future data beyond 10 frames does not significantly improve tracking performance.

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Report Number
DRDC-OTTAWA-TM-2011-214 — Technical Memorandum
Date of publication
01 Dec 2011
Number of Pages
32
DSTKIM No
CA037028
CANDIS No
536674
Format(s):
Electronic Document(PDF)

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