Linear combination optimization model of BeiDou triple-frequency integral coefficient carrier phase observation
(2.Institute of Surveying and Mapping, Information Engineering University, Zhengzhou, Henan Province, China 450001)
【Abstract】According to the application requirements of BeiDou triple-frequency observation, the linear combination observation model was established. Based on the error analysis of the model, a spatial analysis of the real coefficient ionosphere-free combination, troposphere-free combination, and minimum noise combination weakening or eliminating errors was conducted from a geometric perspective. Then, the relationship between the ionosphere-free plane, the troposphere-free plane, and the minimum noise line was more intuitively described. Upon this basis, the linear combination of the BeiDou integral coefficient was derived, and the combination of long wavelengths, weak ionospheric delay and weak observation noise was analyzed. Moreover, the number of lanes, the ionospheric delay coefficient and the noise amplification factor were used as the judgment indicators for the linear combination of the optimal triple-frequency integral coefficient. Finally, several sets of the linear combination of the optimal triple-frequency integral coefficient with different characteristics represented by (−1, −5, 6), (0, −1, 1), and (1, 4, −5) were obtained, and the sum of the coefficients of the optimized liner combination model of triple-frequency integral coefficient was generally S = 0 or S = ±1.
【Keywords】 BeiDou triple-frequency observation; integral coefficient; linear combination; ionosphere-free; troposphere-free; the minimum noise; long wavelength;
(Translated by FAN JC)
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