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Earth Rotation Parameters From DSN VLBI: 1995

Show simple item record Steppe, J. en_US Oliveau, S. en_US Sovers, O. en_US 2004-10-03T05:17:32Z 2004-10-03T05:17:32Z 1995
dc.identifier.citation U.S. National Earth Orientation Service Annual Report en_US
dc.identifier.clearanceno 95-1162
dc.description.abstract A description of the DSN VLBI data set and of last year's analysis can be found in last year's report. Other than including another year's data, the main changes in this year's analysis from last year's are in the use of meteorological data for determining tropospheric parameters and in the weighting of the data to account for the uncertainty in the observables caused by tropospheric effects and source structure. A priori dry zenith tropospheric delays were determined from barometric pressure measurements at the DSN sites, corrected for height differences between the pressure sensor and the antennas. A priori wet zenith tropospheric delays were derived from tables of monthly average wet zenith delays for each station, which are based on historical radiosonde data. The Lanyi function was used for mapping zenith tropospheric delays to observed elevations. the temperature at the top of the boundary layer, a parameter in the Lanyi function, was taken to be the 24-hour average of the surface temperature at the station. Adjustments to the wet troposphere zenith delays were estimated every two to three hours. en_US
dc.format.extent 128469 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other Earth rotation, DSN, VLBI en_US
dc.title Earth Rotation Parameters From DSN VLBI: 1995 en_US

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