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
20202760204
20212546306
20222289704
20232735900
20241472236