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Ground-Based Global Navigation Satellite System Observation Summary Data (30-second sampling, daily files) from NASA CDDIS
temporal
2021
01
Day
File Count
01
91
02
242
03
666
04
665
05
670
06
670
07
669
08
668
09
687
10
661
11
658
12
474
13
71
14
69
15
71
16
73
17
87
18
278
19
681
20
672
21
662
22
676
23
668
24
658
25
658
26
687
27
691
28
680
29
693
30
678
31
672