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
199640870
199749127
199860250
199966762
200092894
200184106
2002100115
2003114743
2004119799
2005124371
2006134468
2007137210
2008141132
2009147495
2010160279
2011172595
2012260442
2013252811
2014311883
2015292588
2016365692
2017194822
2018208734
2019179391
2020147089
202197019
2022106685
202385721
202481024
202558676
202631832