DocumentCode :
1515323
Title :
Airborne GMTI radar position bias estimation using static-rotator targets of opportunity
Author :
Bar-Shalom, Y.
Volume :
37
Issue :
2
fYear :
2001
fDate :
4/1/2001 12:00:00 AM
Firstpage :
695
Lastpage :
699
Abstract :
In target tracking systems: using GMTI (ground moving target indicator) radars on airborne platforms, the locations of these platforms are available from GPS-based estimates. However, these estimated locations are subject to errors that are, typically, stationary autocorrelated random processes, i.e., slowly varying biases. In situations where there are no known-location targets to estimate these biases, the next best recourse is to use targets of opportunity at fixed but unknown locations. Such targets can be, e.g., static rotators (ground-based radars with rotating antenna), which yield detections in moving target indicator (MTI) radars. It is shown that these biases can be estimated in such a scenario, i.e., they meet the complete observability condition. Following this, the achievable accuracy for a generic scenario is evaluated. It is shown that accurate georegistration can be obtained even with a small number of measurements
Keywords :
Global Positioning System; airborne radar; observability; radar theory; radar tracking; random processes; state estimation; target tracking; GPS-based estimates; airborne GMTI radar; airborne platforms; complete observability; georegistration; ground moving target indicator; ground-based radars; moving target indicator radar; position bias estimation; rotating antenna; slowly varying biases; static-rotator targets; stationary autocorrelated random processes; Airborne radar; Autocorrelation; Navigation; Observability; Radar antennas; Radar detection; Radar tracking; State estimation; Target tracking; Uncertainty;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/7.937480
Filename :
937480
Link To Document :
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