Gps Receiver
Mostrando 25-26 de 26 artigos, teses e dissertações.
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25. Using the GPS system to estimate the ionospheric refraction in Brazil. / O sistema GPS como ferramenta para avaliação da refração ionosférica no Brasil.
Since the US president decided to turn off the selective availability (SA) one of the biggest error in the GPS system has been the ionosphere refraction. The refraction effect on GPS signals are: delay for the code and an advance for the phase. In the equatorial region, where Brazil is, the refraction presents the biggest variations that are caused by the so
Publicado em: 2002
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26. Desenvolvimento de um navegador autônomo, usando GPS, aplicado ao controle autônomo de órbita. / Autonomous orbit navigator development, using GPS, applied to autonomous orbit control.
The appearance of modern global positioning systems motivated the study and development of precise and robust systems for autonomous orbit determination of artificial satellites. These systems maintain, independently from human intervention from the ground, a precise knowledge of the satellite orbital state, through the processing of the information, autonom
Publicado em: 2001