Accession Number : ADA134657


Title :   A Digital Filter Representation of the ASQ-81 Magnetometer


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Huete, Micheal C.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA134657


Report Date : SEP 1983


Pagination or Media Count : 121


Abstract : A digital filter representation of the ASQ-81 magnetometer is derived from the s-plane transfer functions of the system through the use of a bilinear transformation. A FORTRAN computer program is written which applies this representation to time-sampled total magnetic field data in order to obtain a time seris representation of ASQ-81 filtered total field. A series of simulations and a field experiment are conducted which verify the program output. Applications of this program include usage in conjunction with geomagnetic field data in order to produce a new data set representative of geomagnetic noise observed by Navy MAD (Magnetic Anomaly Detection) aircraft with the potential to investigate techniques of reducing geomagnetic noise in MAD aircraft. (Author)


Descriptors :   *GEOMAGNETISM , *MAGNETOMETERS , *MAGNETIC ANOMALY DETECTION , SIGNAL PROCESSING , MAGNETIC FIELDS , TRANSFER FUNCTIONS , COMPUTER PROGRAMMING , THESES , SUBMARINE DETECTION , DIGITAL FILTERS


Subject Categories : GEOMAGNETISM
      TEST FACILITIES, EQUIPMENT AND METEORS
      UNDERSEA AND ANTISUBMARINE WARFARE
      MAGNETIC & ELECTRIC FLD DETECTION AND DETECTORS


Distribution Statement : APPROVED FOR PUBLIC RELEASE