Abstract
Abstract. During the Continuous Very Long Baseline Interferometry (VLBI) Campaign 2017 (CONT17), carried out from 28 November through 12 December 2017, an extensive data set of atmospheric observations was acquired at the Geodetic Observatory Wettzell. In addition to in situ measurements of temperature, humidity, pressure or wind speed at the surface, radiosonde ascents yielded meteorological parameters continually up to 25 km height, and integrated water vapor (IWV) was obtained at several elevations and azimuths from a water vapor radiometer. Troposphere delays estimated from Global Navigation Satellite Systems (GNSS) observations plus comparative values from two different Numerical Weather Models (NWMs) complete the abundance of data. In this presentation, we compare these data sets to parameters of the Vienna Mapping Functions 1 and 3 (VMF1 & VMF3), which are based on NWM data by the ECMWF, and to estimates of VLBI analysis using the Vienna VLBI and Satellite Software (VieVS). On the one hand, we contrast the variety of troposphere delays in zenith direction with each other, while on the other hand we utilize radiosonde data and meteorological observations at the site to create local mapping functions which can then be compared to VMF3 and VMF1 at Wettzell. In general, we thus received very good accordance between the different solutions. Also in terms of the mapping functions, the local radiosonde mapping function is in consistence with VMF1 and VMF3 with differences less than 5 mm at 5∘ elevation.
Highlights
From 28 November through 12 December 2017, the Geodetic Observatory Wettzell carried out an extensive measurement campaign of atmospheric and meteorological parameters (Klügel et al, 2019)
The time frame was chosen such as to coincide with CONT17, the Continuous VLBI (Very Long Baseline Interferometry) experiment 2017
– hourly zenith wet delays Lzw estimated from VLBI analysis at the station WETTZELL using the Vienna VLBI and Satellite Software (VieVS; Böhm et al, 2018)
Summary
From 28 November through 12 December 2017, the Geodetic Observatory Wettzell carried out an extensive measurement campaign of atmospheric and meteorological parameters (Klügel et al, 2019). – two independent Global Navigation Satellite Systems (GNSS) analyses yielded hourly zenith total delays Lz at station WTZR, once performed by BKG data center (GNSSBKG) and once performed by the Wettzell local array using the inhouse analysis software SGSS (GNSSWETT) (Klügel et al, 2019). In addition to this observation campaign, we supplement the data sets with the following quantities:. Six-hourly zenith delays Lzw and hydrostatic delays Lzh, zenith wet mapping factors mfh and mfw from the Vienna Mapping Functions 1 (VMF1; Böhm et al., 2006).
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