Accession Number : ADA564651


Title :   Ground Vehicle Navigation Using Magnetic Field Variation


Descriptive Note : Doctorial thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Shockley, Jeremiah A


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA564651


Report Date : 13 Sep 2012


Pagination or Media Count : 186


Abstract : The Earth's magnetic field has been the bedrock of navigation for centuries. The latest research highlights the uniqueness of magnetic field measurements based on position due to large scale variations as well as localized perturbations. These observable changes in the Earth's magnetic field as a function of position provide distinct information which can be used for navigation. This dissertation describes ground vehicle navigation exploiting variation in Earth's magnetic field using a self-contained navigation system consisting of only a magnetometer and magnetic field maps. In order to achieve navigation, effective calibration enables repeatable magnetic field measurements from different vehicles and facilitates mapping of the observable magnetic field as a function of position. A new modified ellipsoid calibration technique for strapdown magnetometers in large vehicles is described, as well as analysis of position measurement generation comparing a multitude of measurement compositions using existing and newly developed likelihood techniques. Finally, navigation solutions are presented.


Descriptors :   *MAGNETIC FIELDS , *NAVIGATION , GEOMAGNETISM , GROUND VEHICLES , PERTURBATIONS


Subject Categories : Magnetic & Electric Fld Detection & Detectors
      Navigation and Guidance


Distribution Statement : APPROVED FOR PUBLIC RELEASE