UNB3m_pack: a neutral atmosphere delay package for radiometric space techniques |
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| Authors: | Rodrigo F Leandro Richard B Langley Marcelo C Santos |
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| Institution: | (1) Geodetic Research Laboratory, Department of Geodesy and Geomatics Engineering, University of New Brunswick, Fredericton, Canada;(2) Trimble Terrasat GmbH, Trimble Geomatics and Engineering Group, Haringstr. 19, 85635 Hoehenkirchen, Germany |
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| Abstract: | Several hybrid neutral atmosphere delay models have been developed at the University of New Brunswick. In this paper we are
presenting UNB3m_pack, a package with subroutines in FORTRAN and corresponding functions in MatLab which provides neutral
atmospheric information estimated using the UNB3m model. The main goal of UNB3m is to provide reliable predicted neutral atmosphere
delays for users of global navigation satellite systems (GNSS) and other transatmospheric radiometric techniques. Slant neutral
atmosphere delays are the main output of the package, however, it can be used to estimate zenith delays, Niell mapping functions
values, delay rates, mapping function rates, station pressure, temperature, relative humidity and the mean temperature of
water vapor in the atmospheric column. The subroutines work using day of year, latitude, height and elevation angle as input
values. The files of the package have a commented section at the beginning, explaining how the subroutines work and what the
input and output parameters are. The subroutines are self-contained, i.e., they do not need any auxiliary files. The user
has simply to add to his/her software one or more of the available files and call them in the appropriate way.
The GPS Tool Box is a column dedicated to highlighting algorithms and source code utilized by GPS engineers and scientists.
If you have an interesting program or software package you would like to share with our readers, please pass it along; e-mail
it to us at gps-toolbox@ngs.noaa.gov. To comment on any of the source code discussed here, or to download source code, visit
our website at . This column is edited by Stephen Hilla, National Geodetic Survey, NOAA, Silver Spring, Maryland, and Mike Craymer, Geodetic
Survey Division, Natural Resources Canada, Ottawa, Ontario, Canada. |
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| Keywords: | GNSS Neutral atmosphere UNB3m |
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