1. Global Navigation Satellite System (GNSS) Troposphere Zenith Path Delay (ZPD) product (Version 1) from NASA CDDIS
  2. temporal
YearFile Count
2010365
2011115
20121027
2013159
2014476
2015711
20161276
2017910
20181216
20191336
2020968
2021833
2022685
202363