An Auto-Calibration Method for Unattended Ground Sensors

Abstract

We present an algorithm for locating and orienting a set of sensor arrays that have been deployed in a scene at unknown locations and orientation angles. This self-calibration problem is solved using a number of source signals also deployed in the scene. We assume each array can estimate the time-of-arrival and direction-of-arrival (with respect to the array's local orientation coordinates) of every source. From this information we compute the array locations and orientations. We consider four subproblems, in which the source signals or emission times are either known or unknown. We develop necessary conditions for solving the self-calibration problem and provide a maximum likelihood solution and corresponding location error estimate.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2001
Accession Number
ADA409855

Entities

People

  • Dushyanth Krishnamurthy
  • Randolph L. Moses
  • Robert Patterson

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Algorithms
  • Angle Of Arrival
  • Calibration
  • Command Centers
  • Computations
  • Computers
  • Computing System Architectures
  • Detectors
  • Electrical Engineering
  • Equations
  • Estimators
  • Measurement
  • Military Research
  • Network Architecture
  • Networks
  • Translations
  • Two Dimensional

Readers

  • Geodesy
  • Operations Research
  • Sensor Fusion and Tracking Systems.