%0 Journal Article
%@nexthigherunit 8JMKD3MGPCW/446AF4B
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@archivingpolicy denypublisher allowfinaldraft
%@tertiarymark Trabalho Vinculado à Tese/Dissertação
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JHC9
%X If three or more GPS antennas are mounted properly on a platform and differences of GPS signals measurements are collected simultaneously, the baselines vectors between antennas can be determined and the platform orientation defined by these vectors can be calculated. Thus, the prerequisite for attitude determination technique based on GPS is to calculate baselines between antennas to millimeter level of accuracy. For accurate attitude solutions to be attained, carrier phase double differences are used as main type of measurements. The use of carrier phase measurements leads to the problem of precise determination of the ambiguous integer number of cycles in the initial carrier phase integer ambiguity. In this work two algorithms LSAST and LAMBDA were implemented and tested for ambiguity resolution allowing accurate real-time attitude determination using measurements given by GPS receivers in coupled form. Platform orientation was obtained using quaternions formulation, and the results showed that LSAST method performance is similar to LAMBDA as far as the number of epochs which are necessary to resolve ambiguities is concerned, but with processing time significantly higher. The final result accuracy was similar for both methods, better than 0.1. to 0.2., when baselines are considered in decoupled form.
%N Article number: 596396
%T Analysis of Attitude Determination Methods Using GPS Carrier Phase Measurements
%@electronicmailaddress
%@electronicmailaddress hkk@dem.inpe.br
%@secondarytype PRE PI
%K Attitude Determination, GPS ambiguity resolution, Lambda method, LSAST method.
%@usergroup administrator
%@usergroup lattes
%@usergroup secretaria.cpa@dir.inpe.br
%@group
%@group DMC-ETE-INPE-MCTI-GOV-BR
%@e-mailaddress hkk@dem.inpe.br
%3 baroni&kuga_2012_analysis_of_attitude.pdf
%@secondarymark B5_ASTRONOMIA_/_FÍSICA B4_CIÊNCIA_DA_COMPUTAÇÃO B3_CIÊNCIAS_AGRÁRIAS_I B1_ENGENHARIAS_I B2_ENGENHARIAS_II B1_ENGENHARIAS_III A2_ENGENHARIAS_IV A2_INTERDISCIPLINAR B3_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA
%F lattes: 1786255724025154 2 BaroniKuga:2012:AnAtDe
%@issn 1024-123X
%@issn 1563-5147
%2 dpi.inpe.br/plutao/2012/06.21.17.17.01
%@affiliation Institute of Science, Engineering and Technology, Federal University of Jequitinhonha and Mucuri Valleys (UFVJM)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Mathematical Problems in Engineering
%@versiontype publisher
%P 1-10
%4 dpi.inpe.br/plutao/2012/06.21.17.17
%@documentstage not transferred
%D 2012
%V 2012
%@doi 10.1155/2012/596396
%O Setores de Atividade: Pesquisa e desenvolvimento científico.
%A Baroni, Leandro,
%A Kuga, Hélio Koiti,
%@dissemination PORTALCAPES
%@area ETES