Direction finding is only one part of radio surveillance or reconnaissance. Its objective is to determine the azimuthal angle of incidence of an electromagnetic wave (LOB: line of bearing) and in consequence to spot the site of the transmitter involved. From this point of view it is mere technical challenge. The requirements of potential users of such equipment will, of course, be totally different. Emissions may be entirely unintended as for instance EMI's from defective equipment as diathermal medical equipment, worn out ground connections or filtering equipment of authorized participants (radio amateurs, authorities, CB-equipment) and quite frequently 'forgotten' transmitters in communication equipment (public transport, police, airports) where malfunctioning of a microphone switch however the transmitter on thus blocking one communication channel. As experience shows, also illegaly intended emissions by agents, terrorists or demonstrators have to be considered. Particular tactical or strategical aspects are left to the imagination of the reader. Illegal transmissions to be detected in the VHF/UHF range are according to certain experiences concentrated in the CB-Bands (27 MHz), FM broadcasting bands (85 to 105 MHz), around the amateur band (145 MHz) and between 450-470 MHz.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Mobile direction finding stations for radio location


    Additional title:

    Bewegliche Stationen zur Richtungsanzeige mit Funkortung


    Contributors:
    Pfaff, K. (author)


    Publication date :

    1984


    Size :

    20 Seiten, 10 Bilder


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Radio direction finding at Post Office Coast Stations

    Farnes, G.H. / Hollinghurst, F. | Engineering Index Backfile | 1930


    The siting of direction finding stations

    Ross, W. / Horner, F. | TIBKAT | 1952


    Radio direction finding

    Hyland, L.A. | Engineering Index Backfile | 1928


    Radio direction finding

    Mesny, R. | Engineering Index Backfile | 1932


    Radio direction finding

    Engineering Index Backfile | 1926