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: http://www.mrao.cam.ac.uk/~bn204/alma/aatm-dispersive.html
Дата изменения: Mon Apr 4 13:47:51 2016 Дата индексирования: Sun Apr 10 06:33:46 2016 Кодировка: ISO8859-5 Поисковые слова: m 11 |
This is a short and simple illustration of how to use (A)ATM to calculate the dispersive path delay introduced by the atmosphere as well as the non-dispersive parts. The program has only two run-time parameters: the frequency at which to carry out the computation and the relative humidity at ground level.
If you have performed similar calculations and get same or different results, I would very much like to hear from you.
This program is part AATM from version 0.06. The program has been evolving, so the current version has substantially more features.
The interaction with the program below is extremely simple and best illustrated by an example:
./dispersive --help
Produces the help message, which for current version is:
Compute dispersive delay in the atmosphere
This program is part of AATM version 0.06
GPL license -- you have the right to the source code. See COPYING
Allowed options:
--help Produce this help message
--freq arg Frequency at which to compute the dispersion (GHz)
--ghum arg Relative humidity at ground level (percent)
The actual computation can look like this:
./dispersive --freq 330 --ghum 25
Freq Wet Non-Disp Wet Disp Dry Non-Disp
330 0.0137844 0.00144976 1.47484
Please download AATM (see AATM Download) for the latest version
of the dispersive program. It is located in the test/dispersive.cpp
file.