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Advisor(s)
Abstract(s)
The estimates of the zenith wet delay resulting from the
analysis of data from space techniques, such as GPS and
VLBI, have a strong potential in climate modeling and
weather forecast applications. In order to be useful to
meteorology, these estimates have to be converted to
precipitable water vapor, a process that requires the
knowledge of the weighted mean temperature of the
atmosphere, which varies both in space and time.
In recent years, several models have been proposed to
predict this quantity. Using a database of mean
temperature values obtained by ray-tracing radiosonde
profiles of more than 100 stations covering the globe, and
about 2.5 year’s worth of data, we have analyzed several
of these models. Based on data from the European region,
we have concluded that the models provide identical
levels of precision, but different levels of accuracy. Our
results indicate that regionally-optimized models do not
provide superior performance compared to the global
models.
Description
Keywords
Sistemas de informação geográfica
Citation
Proceedings of the 2000 National Technical Meeting. - USA : Institute of Navigation, 2000. - p.433-439
Publisher
USA