1. Ground-Based Global Navigation Satellite System (GNSS) Observation Data (30-second sampling, daily, 24 hour files) from NASA CDDIS
  2. temporal
YearFile Count
199215954
199325182
199422671
199533124
199640871
199749127
199860250
199966768
200092895
200184108
2002100116
2003114743
2004119799
2005124378
2006134532
2007137252
2008141187
2009147516
2010160290
2011172596
2012260447
2013252814
2014311914
2015292594
2016365706
2017194827
2018208734
2019179399
2020147090
202197019
2022106685
202385721
202481272
202558731
202652972