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The real time ionosphere data here: https://cddis.nasa.gov/archive/gnss/products/realtime/jpl_ionosphere Contains negative total electron count values in the atec column. Somebody asked a question here: https://forum.earthdata.nasa.gov/viewtopic.php?t=5484 But the answer did not provide enough infor...

Did this question ever get a more detailed answer about how one would use this data? For example, the atec and stec fields are sometimes negative where as TEC is positive. Is that due to a per site bias that needs to be calibrated? The scale of the tec fields are different by about 3 orders of magni...

The ionosphere prediction data for 5/30 that I would expect to be here: https://cddis.nasa.gov/archive/gnss/products/ionex/2025/150/c2pg1500.25i.Z is not present. That two day prediction data would usually have been available a day ago, but the 150 directory doesn't exist as of Fri May 30 06:17:16 U...