UNB3m_pack: a neutral atmospher delay package for radiometric space techniques -- by Rodrigo F. Leandro,
Richard B. Langley, and Marcelo C. Santos
The technical paper which describes this code is published in
GPS Solutions, Volume 12, Number 1, January 2008, pages 65-70,
"UNB3m_pack: a neutral atmospher delay package for radiometric space techniques"
by Rodrigo L. Leandro, Richard B. Langley, and Marcelo C. Santos
Geodetic Research Laboratory, Department of Geodesy and Geomatics Engineering,
University of New Brunswick,
P.O. Box 4400
Fredericton – NB
Canada E3B 5A3
[R.L.Leandro also at Trimble Terrasat GmbH, Trimble Geomatics and Engineering Group,
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 atmosphere 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 and relative humidity and the
mean temperature of water vapour 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.
UNB3m_pack can be downloaded from the website of the Department of
Geodesy and Geomatics Engineering of the University of New Brunswick:
In order to decompress the file the user can use one of the
many compression/decompression applications available on the
Internet, such as Filzip (http://www.filzip.com/) or
Winzip (http://www.winzip.com/) for Windows OS with comparable
applications for Macintosh, UNIX, and Linux OS. The uncompressed
text files have DOS end-of-line delimiters.
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