Magnetic Navigation Using Online Calibration Filter Analysis

Abstract

Magnetic navigation using the Earth's magnetic anomaly field has proven to be a promising alternative that can provide coverage for a navigation system. This research demonstrates a magnetic navigation system using an extended Kalman filter (EKF) to aid an aircrafts inertial navigation system (INS). Traditional magnetic anomaly navigation uses a static calibration method, which takes post-processed data to calibrate, obtaining the Tolles-Lawson coefficients needed for magnetic anomaly navigation filter compensation. These coefficients are constant and may cause drifts in the navigation filter if not re-calibrated. The online calibration method continuously updates the Tolles-Lawson coefficients as a filter state, reducing the need for calibration flights. This research uses F-16 data to demonstrate the effectiveness of this method.

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Document Details

Document Type
Technical Report
Publication Date
Mar 24, 2022
Accession Number
AD1166893

Entities

People

  • Jonnathan D. Bonifaz Montesdeoca

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Algorithms
  • Brownian Motion
  • Calibration
  • Department Of Defense
  • Engineering
  • Filter Analysis
  • Filters
  • Global Positioning Systems
  • Inertial Navigation
  • Inertial Navigation Systems
  • Kalman Filters
  • Magnetic Anomalies
  • Magnetic Fields
  • Magnetic Navigation
  • Measurement
  • Navigation
  • Space Weather
  • United States
  • United States Government

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Positioning, Navigation, and Timing (PNT) Technology.