Accession Number:

ADA270703

Title:

A Study of Line of Bearing Errors

Descriptive Note:

Final rept. Aug 1992-May 1993

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

1993-09-01

Pagination or Media Count:

42.0

Abstract:

Many systems use Line-of-Bearing LOB information to locate distant objects. The errors in location due to noisy LOB measurements are the focus of this report. A central assumption for these systems is that the LOB location errors are adequately modeled by bivariate Gaussian distributions. These systems typically use weighted averages to estimate a targets location. A discussion in Thompson and Durfee 1992 illustrates that these location errors are not necessarily Gaussian. In some situations, reasonable errors lead to calculation of implausible target locations. In addition, it was demonstrated that the location distribution is skewed in the direction of increasing range thus, bias is a problem. This report investigates the properties of the errors associated with LOB locations. Guidelines are suggested for various assumptions about LOB location errors. The concept of the stability ratio is introduced and used to determine the possibility of encountering implausible LOB locations as a means of predicting the existence and magnitude of estimator bias to determine the applicability of using a bivariate normal distribution for modeling LOB errors and for determining the utility of closed-form models to predict the covariance of LOB locations. Line of bearing, Target detection, Angle of arrival.

Subject Categories:

  • Statistics and Probability
  • Target Direction, Range and Position Finding

Distribution Statement:

APPROVED FOR PUBLIC RELEASE