Space Geodesy
Mostrando 1-4 de 4 artigos, teses e dissertações.
-
1. PHYSICAL CONNECTION BETWEEN BVRF SEGMENTS BASED ON LEVELING ASSOCIATED WITH GRAVIMETRY
Resumo Considerando os esforços no estabelecimento de Sistemas de Referência Globais vinculados ao geopotencial, buscam-se novas alternativas para abordar os problemas apresentados nas redes verticais clássicas nacionais. A Rede Vertical de Referência do Brasil (RVRB) foi materializada em dois segmentos distintos, com origens independentes (marégrafos d
Bol. Ciênc. Geod.. Publicado em: 18/04/2019
-
2. Numerical Simulations to Assess ART and MART Performance for Ionospheric Tomography of Chapman Profiles
ABSTRACT The incomplete geometrical coverage of the Global Navigation Satellite System (GNSS) makes the ionospheric tomographic system an ill-conditioned problem for ionospheric imaging. In order to detect the principal limitations of the ill-conditioned tomographic solutions, numerical simulations of the ionosphere are under constant investigation. In this
An. Acad. Bras. Ciênc.. Publicado em: 31/07/2017
-
3. 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
-
4. Análise de metodologias no levantamento de dados espaciais para cadastro urbano. / Analyse of methodologys for space data survey in urban cadastre.
This work initially presents an up-to-date revision of methods of obtaining space data for elaboration of urban cadastral plants followed by the procedures and the instrumental used for execution of the survey of an test area with photogrammetry, the GPS system and the resources of the topography. The results were systematized and compared in way they supply
Publicado em: 2001