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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

The Impact on Geographic Location Accuracy due to Different Satellite Orbit Ephemerides

Texto completo
Autor(es):
Celestino, Claudia C. [1] ; Sousa, Cristina T. [2] ; Yamaguti, Wilson [1] ; Kuga, Helio Koiti [3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] INPE, Space Syst Div DSE, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo State UNESP FEG, Math Dept DMA, BR-12516410 Guaratingueta, SP - Brazil
[3] INPE, Space Mech & Control Div DMC, BR-12227010 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: MATHEMATICAL PROBLEMS IN ENGINEERING; 2009.
Citações Web of Science: 0
Resumo

The current Brazilian System of Environmental Data Collection is composed of several satellites (SCD-1 and 2, CBERS-2 and 2B), Data Collection Platforms (DCPs) spread mostly over the Brazilian territory, and ground reception stations located in Cuiaba and Alcantara. An essential functionality offered to the users is the geographic location of these DCPs. The location is computed by the in-house developed ``GEOLOC{''} program which processes the onboard measured Doppler shifts suffered by the signal transmitted by the DCPs. These data are relayed and stored on ground when the satellite passes over the receiving stations. Another important input data to GEOLOC are the orbit ephemeris of the satellite corresponding to the Doppler data. In this work, the impact on the geographic location accuracy when using orbit ephemeris which can be obtained through several sources is assessed. First, this evaluation is performed by computer simulation of the Doppler data, corresponding to real existing satellite passes. Then real Doppler data are used to assess the performance of the location system. The results indicate that the use of precise ephemeris can improve the performance of GEOLOC by reducing the location errors, and such conclusion can then be extended to similar location systems. Copyright (C) 2009 Claudia C. Celestino et al. (AU)

Processo FAPESP: 05/04497-0 - Desenvolvimento de Rede Brasileira para localização geográfica através de satélites artificiais usando desvio Doppler
Beneficiário:Cristina Tobler de Sousa Rae
Linha de fomento: Bolsas no Brasil - Pós-Doutorado