Improving the passive doppler geolocation system through extension of the data reception network

• Autor(a) principal: Sousa,Cristina Tobler de
• Data de Publicação: 2008
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Brasileira de Geofísica (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-261X2008000400001
• topic: Brazilian network; geographical location; satellites; Doppler shift

The main goal of this work is to show an investigation on the improvement of the newly developed Doppler based Brazilian geographic location system using the data reception network software. The Doppler data measurement set of a single satellite pass and a single DCP (Data Collecting Platform), considering a network of ground reception stations, is named as the data reception network. Thus, increasing the terrestrial reception stations around the Brazilian territory, will allow an increment in the coverage and amount of data collected. Consequently the accuracy of the computed locations would also increase as well as the reliability figures. The results and analyses were obtained under two conditions: the first one used both ideal simulated and real conditions to compare results from the same satell ite passes, DCP and two known ground reception stations, the second one used ideal simulated conditions from measurements of one DCP transmitter, three ground stations and two satellites. Results using such database were quite satisfactory. The achieved study showed the importance of additional terrestrial reception stations spread over the Brazilian territory, to increase the measurements amount, as well as to get more valid and precise locations.