Earthdata
CMR Virtual Directories

Global Navigation Satellite System (GNSS) IGS Weekly Ionosphere Vertical Total Electron Content (VTEC) Grid Validation Product from NASA CDDIS
temporal
2025

Month	File Count
01	50
02	56
03	62
04	58
05	53
06	14
07	54
08	62
09	55
10	55
11	60
12	62

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NASA Official: Doug Newman
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