000193190 001__ 193190
000193190 003__ CZ-ZdVUG
000193190 005__ 20190311110931.0
000193190 041__ $$aeng
000193190 040__ $$aABC039$$bcze
000193190 1001_ $$aVan Leeuwen, Sam Storm
000193190 24510 $$aHopfield revisited: Two-6th power tropospheric zenith delay profiles for correcting GNSS data
000193190 5203_ $$9eng$$aGNSS signals experience a delay when passing through the troposphere. This delay cannot be measured directly, models exist to estimate the delay. Models usually split the delay in a zenith hydrographic component and a -wet component, while mapping functions correct for signals coming from non-zenith angles. Meteorological parameters are required as input to the models. If no actual data is available at the user (receiver), use must be made of pre-prepared climatological tables. This mode of operation is called blind mode. A well-known model for estimating the refractivity is the Hopfield two-quartic tropospheric refractivity profile for correcting satellite data [1]. It is shown that mathematical integration of this model gives a two-5th power delay profile. Comparison with zenith hydrostatic and -wet delay profiles derived from a numerical weather model shows a better fit with two 6th power models. The performance of the 6th power hydrostatic and -wet model has been compared with the Saastamoinen hydrostatic model [2] and the pressure-power ratio wet model as proposed by Dousa and Elias [3]. The comparison has been carried out with the models in blind mode. It is shown that in this mode the 6th power models perform as good as the Saastamoinen and Dousa-Elias models.
000193190 6112_ $$aNAVITEC 2016$$cESTEC, Noordwijk, Netherlands$$dDec 14-16, 2016?
000193190 655_4 $$aanotace
000193190 653_0 $$azenith total delay$$atroposphere$$aGNSS
000193190 7001_ $$aDouša, Jan
000193190 7730_ $$92016$$g(2016), p.$$tProceedings of the NAVITEC 2016
000193190 85642 $$uhttps://www.rvvi.cz/riv?s=jednoduche-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F16%3AN0000062%21RIV17-MSM-00025615
000193190 910__ $$aABC039
000193190 943__ $$aDOPLNIT: počet stran, citaci, sehnat
000193190 980__ $$aclanky_vugtk
000193190 985__ $$adousa
000193190 985__ $$aanotace
000193190 985__ $$autvar24
000193190 985__ $$ariv