1. Ground-Based Global Navigation Satellite System Observation Summary Data (30-second sampling, daily files) from NASA CDDIS
  2. temporal
  3. 1998
  4. 12
DayFile Count
01180
02181
03177
04176
05177
06186
07181
08176
09180
10182
11179
12168
13175
14177
15176
16177
17180
18180
19175
20168
21170
22170
23174
24171
25177
26162
27158
28164
29175
30170
31176