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
199749091
199860131
199966762
200092894
200184106
2002100115
2003114665
2004119441
2005124017
2006134115
2007136855
2008140064
2009146768
2010159551
2011171866
2012259710
2013252081
2014311158
2015292012
2016364961
2017193992
2018207570
2019175381
2020143674
202194941
2022104251
202383468
202476953
202513228