北斗多波段多频相位测量值组合模型研究

在多波段导航模式下,研究了北斗L,S和C波段多频相位测量值组合模型。通过巷数,电离层因子以及观测噪声因子,在维持模糊度整数特性条件下,优选长波长、弱电离层时延和低观测噪声的独立线性组合。针对长基线和短基线情境,分别提出基于超宽巷、宽巷、中巷和窄巷的多波段多频相位测量值组合。结果表明,相比于L波段多频,北斗多波段多频相位测量值组合有助于模糊度解算和降低电离层时延,其最大波长为293.05 m,最小一阶电离层因子为0.000 14。所优选的多波段多频相位测量值组合具有长波长,弱电离层时延和低观测噪声整体较优的特性。

Multiband-multifrequency phase measurement combination for Compass

In the mode of multiband navigation, the multifrequency phase measurement combination model for Compass in L, S and C bands is investigated. By the introduction of lane number, ionospheric factor and observation noise factor, some independent linear combinations with long wavelength, weak ionospheric delay and small observation noise are optimized, while retaining integer ambiguity. For both scenarios of short and long baselines, some optimal multiband multifrequency observation combinations for extra wide-lane, wide-lane, medium-lane and narrow-lane are presented separately. The results indicate that compared to multifrequency in L band, Compass multifrequency phase measurement combination in multiband can ease ambiguity resolution and reduce ionosphere delay, whereas the longest wavelength of 293.052 3 m and the smallest first-order ionospheric factor of 0.000 14 are attainable. The proposed multiband-multifrequency phase measurement combinations are overall optimal in terms of long wavelength, weak ionospheric delay and small observation noise.