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- W2372912697 abstract "In this paper,GPS reduced almanac parameters are introduced briefly,and the differences between reduced almanac and midi almanac are analyzed.On this basis,BDS reduced almanac parameters are designed preliminary,and correspond reference values and constant parameter values are given.Based on the reduced almanac user algorithm,partial derivatives of satellite position on reduced almanac parameters are obtained,and the effect of the change of constant parameters on the fitting precision of reduced almanac is analyzed.Calculated results show that:(1)the accuracy of reduced parameters is not affected at all by small deviation of major semi-axis;(2)the small fluctuations of ascension rate have a little influence on the reduced almanac parameters;(3)the small change of the inclination of orbit plane will result in serious fitting error of reduced almanac parameters;(4)the precision of BDS reduced almanac is almost the same as the GPS reduced almanac parameters, which indicates that BDS reduced almanac parameters is designed reasonably." @default.
- W2372912697 created "2016-06-24" @default.
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- W2372912697 date "2014-01-01" @default.
- W2372912697 modified "2023-09-25" @default.
- W2372912697 title "Preliminary Design and Analysis of BDS Reduced Almanac" @default.
- W2372912697 hasPublicationYear "2014" @default.
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