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Table 1

The reference data types, periods, satellite mission, and data sources.

Satellite mission Avg. orbit height (km) Data type LSA HSA Source
COSMIC RO ~800 Nm RO 2011 2014 https://cdaac-www.cosmic.ucar.edu/
Swarm A ~460 Ne in-situ (*1.2248) Jan, Jul 2019 Jan, Jul 2014 ftp://swarm-diss.eo.esa.int/
Swarm B ~510 Ne in-situ (*1.1842) Jan, Jul 2019 Jan, Jul 2014 ftp://swarm-diss.eo.esa.int/
Swarm C ~460 Ne in-situ (*1.2448) Jan, Jul 2019 Jan, Jul 2014 ftp://swarm-diss.eo.esa.int/
DMSP ~800 Ne in-situ Jan, Jul 2008 Jan, Jul 2014 http://cedar.openmadrigal.org/
COSMIC POD ~800 TEC LEO-to-GNSS Jan, Jul 2008 Jan, Jul 2014 http://cdaac-www.cosmic.ucar.edu/
CODE TEC ground-to-GNSS Jan, Jul 2008 Jan, Jul 2014 https://cddis.nasa.gov/archive/gnss/data/
TOPEX/Poseidon ~1340 TEC ground-to-LEO 2008 2003 https://cddis.nasa.gov/archive/gnss/data/
Van Allen probes ~600–30,500 Ne in-situ Dec 2012 Jan, Jul 2014 ftp://rbm.epss.ucla.edu/ftpdisk1/NURD
ICON ~575 Ne in-situ Dec 2019 May 2020 ftp://icon-science.ssl.berkeley.edu/pub

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