Comparing the Effects of Extracting Pseudo-Range Multipath by Different GNSS Observation Combinations" />
<div style="line-height: 150%">Comparing the Effects of Extracting Pseudo-Range Multipath by Different GNSS Observation Combinations</div>
Abstract The pseudo-range multipath extraction formula is derived and the combination coefficients of corresponding observation combinations to extract pseudo-range multipath are calculated. The amplificatory scale of carrier noise is used as the evaluation factor to evaluate the effect of extracting pseudo-range multipath. Then the BDS and GPS data are used to validate these analyses. Finally, these conclusions are drawn: when only correcting the first-order ionospheric error, the extraction effect of triple-frequency pseudo-range/carrier phase observation combination is best. Although the carrier noise is excessively amplified based on triple-frequency second-order ionospheric correction, ionospheric system error is eliminated. When extracting the pseudo-range multipath by dual-frequency combination, the effect of the combination with the largest frequency difference is best; when the same observation is used to extract different pseudo-range multipaths, the pseudo-range multipath on the signal with the largest frequency is best.
