1. Ground-Based Global Navigation Satellite System (GNSS) Compact Observation Data (30-second sampling, hourly files) from NASA CDDIS
  2. temporal
YearFile Count
20053033717
20061671855
2007314021
20081794471
20091388246
20104240
2012868867
201376245
2014887071
20151385952
20162812825
20172862320
20182664913
20194269107
20202760205
20212546307
20222290858
20232753315
20243541570
2025250139