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
199533117
199640507
199748737
199859582
199965985
200092587
200184106
2002100115
2003114665
2004119441
2005124017
2006134115
2007136855
2008140064
2009146768
2010159551
2011171866
2012259710
2013252081
2014311158
2015292012
2016364961
2017193992
2018207568
2019175275
2020143002
202194771
2022104181
202383004
202458520