Software to calculate the Wtec index. Wtec is a regional TEC disturbance that is equal to the mean TEC variation (with periods less than the specified ones) amplitude for a single GPS/GLONASS site. One can make a multisite processing: the software calculates the corresponding index for each site. The maximum duration of the Wtec series is one year.
Just download and extract GetWTEC archive wherever you want (for Windows only).
Files and directories included in the software package
- Executable file (
- Configuration file (
- Automatically created service directories (
GetWTEC takes tec-suite output files as an input. These files must contain the following data:
For further information see tec-suite documentation.
Once you get tec-suite out files, you can
e:\gps\dat\ - datway (path to dat-files) 0 - crit_all =1 (processing of all sites) LIST - site (site name (if crit_all =0)) 2016 - year 1 - daybeg (the first of the processed days) 366 - dayend (the last of the processed days) 300. - hmax (height for calculating the coordinates of ionospheric points, km) 10. - highper (window for removing slow variations, minutes) 15. - gamcutoff (minimum elevation, degrees) 55 - prncutoff (the maximum number of satellites to process) 0 - GNSS_crit =0 (all satellites), =1 (GPS only), =2 (GLONASS only) 999 - GrossDir ("main" direction for processing, if =999 common file only) 4 - NofDirs (number of azimuth sectors (no more than 4))
Some parameters of
GetWTEC.dia need explaining:
crit_all= 1 all the sites found in the directory [datway][year][daybeg] are processed. If
crit_all= 0 only the site specified in the
siteparameter is processed.
- With the parameters
NofDirs, one can specify additional output files with data in certain azimuth sectors relative to the processed station.
NofDirsspecifies the number of sectors (no more than 4).
GrossDirsets the reference center direction for the first sector. If
GrossDir= 999 only the common file will be output.
You can find an output of GetWTEC in the directory
genout\YYYY. For each processed site, a file is created with the name
DDD_DDD(limits of the interval of processed days)
PP(window used to remove slow variations)
F(indicates that the file is common for all azimuths).
GrossDir parameter is set within the 0–360 range, in addition to the common file for the site, some more files (according to
NofDirs value) will be created with data divided by azimuth sectors. The names of such files will look like SSSSDDD_DDD_YYYYAAA_PPmin.dat (AAA refer to center of azimuth sector).
All output files have the same structure. The first lines of an output file may look like this:
300 - height of F2-layer maximum 10 - high filtering period, minutes 15 - elevation cutoff 0 =0 - GPS/GLONASS, =1 - GPS, =2 - GLONASS 999 - main direction 4 - number of directions tec_filt_aver - averaged through all prns filtered TEC variations rms - root mean square of TEC averaging Xaver, Yaver - average position of Ionospheric Pierce Point (km) N_of_Sats - number of satellites time_ut, tec_filt_aver, rms, Xaver, Yaver, N_of_Sats 0.0000 0.0000 0.0000 67.570 14.884 11 0.0083 0.0000 0.0000 68.378 15.365 11 0.0167 0.0056 0.0055 69.187 15.841 11
The first 6 lines duplicate the values of the parameters
NofDirs from the file
The following 4 lines contain a description of the data columns:
time_utrefer to time count in UT hours from the beginning of the first day
tec_filt_averis Wtec data
rmsis data spread during averaging over satellites
Yaverare deviations of the average ionospheric pierce point position from the site in kilometers
N_of_Satsis number of satellites to average.
You can report bugs or suggestions via email.
Should a scientific publication evolve from the conducted estimation from GetWTEC software, the authors are requested to include citation of following publications, where GetWTEC algorithm is described:
- S.V. Voeykov, O.I. Berngardt, and N.V. Shestakov // Geomagnetism and Aeronomy, 2016, Vol. 56, No. 2, pp. 219–228. doi:10.1134/S0016793216020122.
Copyright © 2018 Sergey Voeykov.
Please note that free online access to the acquired data is arranged only for educational and non-commercial research purposes.