Mathematics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001evga.conf..154s&link_type=abstract
Proceedings of the 15th Workshop Meeting on European VLBI for Geodesy and Astrometry. Institut d'Estudis Espacials de Catalunya,
Mathematics
Scientific paper
The stochastic properties of wet path delay values obtained at once in processing the data of VLBI observations in IRIS-S experiments were analyzed.
On the base of the Bonn VLBI group solutions for these observations the temporal structure functions of wet path delay were constructed. They appeared close to power functions with the slopes substantially different from the slopes of the structure functions following from direct measurements of path delays with WVR, radiosonds and interferometers and from the theory ("power law of 2/3").
The most probable cause of noted difference is using in processing the algorithm (LSQ with linear spline of the troposphere delays) that corresponds the stochastic model not adequate the real troposphere fluctuations. Therefore the found values of the path delay for every station in each particular time moment to a high degree represent the property of this model but not real values of the path delay.
For improving the accuracy of calculation the troposphere corrections it should be used not formal approximations and mathematics models but the adequate model of fluctuations corresponding the physical properties of the atmosphere.
Stotskaya Irina M.
Stotskii Alexander A.
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