Earthdata
CMR Virtual Directories

Ground-Based Global Navigation Satellite System Observation Summary Data (30-second sampling, daily files) from NASA CDDIS
temporal
2001
10

Day	File Count
01	231
02	234
03	228
04	236
05	233
06	231
07	236
08	226
09	234
10	233
11	232
12	234
13	235
14	234
15	231
16	233
17	232
18	237
19	234
20	234
21	234
22	242
23	236
24	241
25	243
26	238
27	238
28	242
29	240
30	238
31	239

NASA Links

NASA Official: Stephen Berrick
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