[G06-1] Troposphere monitoring I

[G06-1-06] Analysis of systematic effects in slant total delay estimation with PPP

^○Jan Kaplon, Pawel Hordyniec, Witold Rohm (Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland)

Slant total delay (STD) of GNSS signal estimated during the PPP procedure is a sum of a priori slant hydrostatic delay, estimated wet delay, asymetry introduced by the estimated zenith total delay (ZTD) horizontal gradients and a post-fit residual reduced by the systematic (site-dependant) effect. The main systematic influence on STD is the multipath error. It can be determined from the long time series of post-fit residuals as their average value calculated in equal-area bins or calculated from the raw GNSS observables.
Paper presents the review and comparison of systematic effect maps (mainly multipath) obtained from PPP slant delay estimation post-fit residuals for a set of GNSS stations gathered in the COST ES1206 GNSS4SWEC benchmark database. We are presenting as well the systematic effect influence on estimated STD values through the results of comparison with STDs from WRF model raytracing.