Comments (1)
Hi javadtaghia,
Thanks for your question. Ginan requires the raw ranging observation data in order to process positions. This can come from RINEX data files or RTCM streams but those observations are critical. If you are using Ginan with a correction stream, you will also need to connect to raw observations.
NMEA data are post-processed and provide a solution to observations that were used previously, i.e. they provide positions (along with datestamps and other information) after processing observation data.
Therefore, NMEA data are not raw ranging observations and generally cannot be used to carry out the type of analysis you are looking at. You can process real-time data from a GNSS receiver, but that receiver will need to output the raw observations which you can feed into Ginan.
This may be useful information as well: https://gis.stackexchange.com/questions/274965/postprocessing-with-nmea-data-if-no-rinex-data-is-available
Hope that helps. If you have any further questions or queries, please let us know :)
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