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
199966022
200092557
200183925
200299827
2003114372
2004119081
2005123635
2006133436
2007136410
2008139250
2009146196
2010159279
2011171285
2012324451
2013255286
2014316607
2015307213
2016450860
2017241265
2018257535
2019279756
2020241142
2021188701
2022236708
202397282