Abstract:

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.