GNSS signal processing with ionosphere model for synthetic reference data

摘要

Some embodiments of the present invention derive an ionospheric phase bias and an ionospheric differential code bias (DCB) using an absolute ionosphere model, which can be estimated from data obtained from a network of reference stations or obtained from an external source such as WAAS, GAIM, IONEX or other. Fully synthetic reference station data is generated using the ionospheric phase bias and/or the differential code bias together with the phase leveled clock and ionospheric-free code bias and/or MW bias.

主权项

1. A method of determining position of a rover antenna, comprising:
a. obtaining rover data derived from code observations and carrier phase observations of global navigation satellite system (GNSS) signals of multiple satellites over multiple epochs, b. obtaining correction data comprising (i) an ionospheric phase bias per satellite, (ii) information from which a code leveled clock error per satellite and a phase leveled clock error per satellite is derivable, (iii) a Melbourne-Wübbena (MW) bias per satellite, and (iv) an ionospheric differential code bias per satellite, and c. using the rover data and the correction data and an ionospheric model to determine at least rover antenna positions.