Accession Number : ADA264667


Title :   A Current Assessment of Single Site Locating Technology


Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA


Personal Author(s) : Rose, Robert B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264667.pdf


Report Date : Nov 1992


Pagination or Media Count : 11


Abstract : This paper describes the observed performance of a HF Single Site Locator (SSL) which employs current interferometer technology. 142 locations were obtained from non-cooperative targets over a five day period in April 1989. Locations were determined from fast, high resolution azimuth and elevation angle of arrival measurements and a knowledge of the ionospheric reflecting medium. Exact emitter locations were determined post facto with ground truth data from the field units. Five modes of transmission were encountered and the signals were successfully located. Miss distance accuracies varied between 12.5 kilometers to 40.5 kilometers over ranges that varied from 109 kilometers to 526 kilometers. Performance varied as a function of modulation type with SSB voice being the most difficult to prosecute and packet and burst signals were the easiest to locate. Also performance varied as a function of range and the relationship of the operating frequency to the maximum usable frequency between the SSL and the target. Propagation, Prophet, Expert systems Propagation forecast, Solar disturbances,


Descriptors :   *SITES , *RADIO INTERFEROMETERS , FREQUENCY , PROPAGATION , MEASUREMENT , ANGLE OF ARRIVAL , HIGH RESOLUTION , SIGNALS , ELEVATION , MODULATION , SOLAR DISTURBANCES , LOCATORS , MISS DISTANCE , AZIMUTH , EMITTERS , ARRIVAL , EXPERT SYSTEMS , RUPTURE , TARGETS , RESOLUTION , POSITION(LOCATION) , PACKETS


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE