Topical Issue - Space Weather Instrumentation
Open Access
Research Article

Table 2

Summary of the F2 peak parameters residuals ΔfoF2 and ΔhmF2 between collocated COSMIC-2 and ionosonde measurements in absolute (ΔX = X ROX ionosonde) and relative (ΔX (%) = (X ROX ionosonde) × 100/(X ionosonde)) values. The dataset is subdivided into low/middle latitudes zones and daytime/nighttime conditions. Cells with orange and cyan shading show maximal and minimal values of the residuals mean, respectively.

Absolute values
Relative values (%)
Mean SD Mean SD
hmF2
 Low latitudes 5.289 km 22.181 km 2.195% 8.175%
 Middle latitudes 2.217 km 13.725 km 1.224% 5.708%
 Low latitudes, day (08–20 LT) 7.793 km 23.913 km 3.238% 8.775%
 Low latitudes, night (20–08 LT) 1.944 km 19.170 km 0.807% 7.081%
 Mid latitudes, day (08–20 LT) 3.441 km 12.960 km 1.832% 5.766%
 Mid latitudes, night (20–08 LT) 0.543 km 14.567 km 0.392% 5.533%
foF2
 Low latitudes 0.405 MHz 0.771 MHz 11.355% 18.205%
 Middle latitudes 0.479 MHz 0.485 MHz 14.049% 14.789%
 Low latitudes, day (08–20 LT) 0.346 MHz 0.897 MHz 7.274% 14.874%
 Low latitudes, night (20–08 LT) 0.483 MHz 0.565 MHz 16.548% 20.565%
 Mid latitudes, day (08–20 LT) 0.528 MHz 0.515 MHz 12.909% 13.085%
 Mid latitudes, night (20–08 LT) 0.418 MHz 0.437 MHz 15.492% 16.610%

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