BackForward Variable: foF2

Full name foF2
Definition Critical frequency of the F2 layer of the ionosphere. This critical frequency (f, in MHz) is associated with the electron density (Ne, in cm-3): f=9*10-3*sqrt(Ne).
Measuring Units MHz Uncertainty Units MHz
Horizontal Res Units km Vertical Res Units
Stability Units MHz (Stability /decade)


Comment: Measured as the highest frequency of radio signal that reflects back from the F2 layer peak.
Last modified: 2014-11-28
Applied in OSCAR/Space Gap Analysis: No
  • Domain: Outer Space
    • Sub-domain: Ionospheric disturbances
      • Variable: foF2
        • Measured in Layers:
          • n/a (2D)
  • Cross-cutting themes:

Requirements defined for foF2  (1)

This tables shows all related requirements. For more operations/filtering, please consult the full list of Requirements
Note: In reading the values, goal is marked blue, breakthrough green and threshold orange

Id Variable Layer App Area Uncertainty Stability / decade Hor Res Ver Res Obs Cyc Timeliness Coverage Conf Level Val Date Source
582 foF2 n/a (2D) Space Weather 0.05 MHz
0.1 MHz
0.2 MHz
100 km
200 km
500 km
5 min
15 min
60 min
60 sec
10 min
60 min
Global tentative 2011-05-01 ICTSW-1