1. Ground-Based Global Navigation Satellite System Observation Summary Data (30-second sampling, daily files) from NASA CDDIS
  2. temporal
  3. 1997
  4. 12
DayFile Count
01142
02139
03140
04141
05146
06139
07141
08146
09138
10138
11134
12141
13145
14140
15139
16136
17136
18141
19136
20142
21137
22136
23137
24136
25142
26136
27134
28142
29138
30135
31144