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The CDDIS has ionosphere total electron content maps available in our archive. Information on these files is found here: https://www.earthdata.nasa.gov/data/space-geodesy-techniques/gnss/atmospheric-products Information on downloading CDDIS data is found here: https://forum.earthdata.nasa.gov/viewto...

The people best able to answer your questions are Siddharth Krishnamoorthy (Siddharth.Krishnamoorthy@jpl.nasa.gov) and Camille Martire (camille.martire@jpl.nasa.gov).

The best people to direct your questions to would be Siddharth Krishnamoorthy (Siddharth.Krishnamoorthy@jpl.nasa.gov) and Camille Martire (camille.martire@jpl.nasa.gov).