| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 99 === For positioning purpose, using carrier-phase observations has to deal with the highly correlated parameters between ambiguity and geometry. Generally, there are two ways to solve the problem, integer-valued decorrelating algorithm and ambiguity function method. Theoretically, estimating and eliminating ambiguity are equivalent.
GLONASS have been operated stably and provided free service worldwide. Currently, it is the most potential satellite system to integrate with GPS. Otherwise, the FDMA signal structure, which is different from CDMA, makes integrations full of challenge.
The proposed method generates the solution of geometry in the condition of preserving integer-valued ambiguity. The experiments used GLONASS and GPS observations to compare with different baseline lengths, satellite configurations and TWIM corrections in positioning results. The results show that GPS is more available than GLONASS in Taiwan region. With TWIM corrections, the GPS positioning differences is 7 cm in horizontal and 14 cm in vertical component. GLONASS positioning differences is 12 cm in horizontal and 23 cm in vertical component.
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