For the period of CONT11, a continuous VLBI campaign which lasted from September 15 through September 29, 2011, new a coefficients for the Vienna Mapping Functions 1 (VMF1; Böhm et al., J Geophys Res 111:B02406, 2006) and an extended calculation strategy for horizontal gradients were applied. The a coefficients of the mapping functions are usually calculated by ray-tracing through numerical weather models (NWM) from the European Centre forMedium-RangeWeather Forecasts (ECMWF) with a spatial resolution of 0.25° × 0.25ı every 6 h. By enhancing the spatial resolution to 0.125° × 0.125ı and using a new ray-tracing program called RADIATE, the actual refractivities are described in more detail. Moreover, existing equations for the calculation of the azimuth-dependent part of the slant delay by means of horizontal gradients were extended in order to achieve better accordance with the data from ray-tracing, which improves the resulting baseline length repeatabilities.
CITATION STYLE
Landskron, D., Hofmeister, A., & Böhm, J. (2017). Refined tropospheric delay models for CONT11. In International Association of Geodesy Symposia (Vol. 146, pp. 65–69). Springer Verlag. https://doi.org/10.1007/1345_2015_56
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