1. Ground-Based Global Navigation Satellite System (GNSS) Compact Observation Data (30-second sampling, daily, 24 hour files) from NASA CDDIS
  2. temporal
YearFile Count
19925712
199317105
199422643
199532937
199640509
199748761
199859586
199966167
200092859
200184216
2002100122
2003114670
2004119384
2005124084
2006134100
2007136962
2008139749
2009146988
2010160373
2011172665
2012325669
2013256722
2014318056
2015308938
2016453192
2017243839
2018260628
2019284886
2020246913
2021193927
2022242401
2023236244
2024188266