I need to plot and read TEC value file downloaded from NASA server. Is there any tool to read it or any programing language.
I am not sure which TEC do you need.
I would suggest using our project SIMuRG ( https://simurg.iszf.irk.ru/; Yasyukevich et al., 2020)
Yasyukevich et al. SIMuRG: System for Ionosphere Monitoring and Research from GNSS // GPS solutions V. 24, 69, 2020. https://link.springer.com/article/10.1007%2Fs10291-020-00983-2.
You can use Matlab to read and plot the Ionosperic TEC data.
I think some researchers use IDL or Matlab to plot the 2-D TEC figure. There should be some existing programs to achieve such plot.
Yury Yasyukevich Let me explain.
1- data, I have, and
2- need a demonstration like
following attachment.
I will read your paper suggested above.
Sivavaraprasad Gampala
I think so, but new this field. Can you share more on this?
Currently, through SIMuRG you can only plot full map at https://simurg.iszf.irk.ru/gecmap.
I will think about regional plot.
@Mohd Saqib, you can use MATLAB to read the IONEX file. And after Processionng you can plot it in any GIS software. I plot the anomaly map In ArcGIS..
You can use GPS-TEC analysis application Developed by Dr. Gopi Krishna Seemala.
Brief features of this application - GPS data analysis
Ability to batch process the input files (RINEX format etc) for example: all files of the month, year, all stations and all files in directory.
Gets ephemeris from IGS navigation file, has the ability to download the navigation file automatically if connected to internet; unless it finds the file in the same directory as data.
Calculates TEC from the observation data of GPS Rinex, Novatel (reads only ID43 records), SCINDA (.scn files) and Leica (for leica formats, file name convention is yet to fix, works with our convention names now).
Process cycle slips in phase data
Read satellite biases from DCB IGS code files, if not available calculates them.
Calculates the receiver bias
Calculates the inter-channel biases for different satellites in the receiver.
Plots the vertical TEC values on screen and writes ascii output files (*.CMN & *.STD) in the same directory of data file.
The quite reliable source could be the RINEX GPS-TEC software as others already suggested to you. Just check the version you will obtain regarding automatic download of DCB files.
Good luck!
You may try GPS-TEC (Ver. 2.9.5, https://seemala.blogspot.com/). The software can automatically download DCBs to your local directory as long as you have an internet connection. However, you may not be able to process observation data in Rinex 3.03 currently.
You may also try GAMIT/GLOBK( Ver. 10.71, http://geoweb.mit.edu/gg/).
There are some other options to extract TEC from GNSS observations which you may have a look:
1) IONOLAB-TEC online and desktop executable (http://www.ionolab.org/), developed by IONOLAB Group, Hacettepe University, Ankara
2) ICTP Calibrated GNSS TEC Service (https://arplsrv.ictp.it/) developed under the research group at ICTP
Thanks
Apart from the above-mentioned answers, you can also use TEC database at http://cedar.openmadrigal.org/ for your required stations.
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