Earthdata
CMR Virtual Directories

Ground-Based Global Navigation Satellite System (GNSS) Observation Data (30-second sampling, hourly files) from NASA CDDIS
temporal
2021

Month	File Count
03	2310
04	264
05	168
06	4019
07	5321
08	4798
09	5287
10	5875
11	5486
12	5687

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NASA Official: Stephen Berrick
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