BackForward Variable: foF2

Definition
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
Classification
  • Domain: Outer Space
    • Sub-domain: Ionospheric disturbances
      • Variable: foF2
        • Measured in Layers:
          • n/a (2D)
  • Cross-cutting themes:

Requirements defined for foF2  (2)

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, threshold orange
Application-dependent Technical Priority (ATP) Magenta and Relative priority of the attributes Red

Id Variable Layer App Area ATP Uncertainty Layer/s Quality Coverage Quality Stability / decade Hor Res Ver Res Obs Cyc Timeliness Coverage Conf Level Val Date Source General Comment Application Area Comment Horizontal Coverage Comment Observation Comment Performance Comment
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 e-density profile determination
1155 foF2 n/a (2D) 1.3 Ionosphere, Thermosphere and Geomagnetic Field Forecasting and Monitoring 1.0 0.05 MHz
0.1 MHz
0.2 MHz
0.5 		100 km
200 km
500 km
0.5 		5 min
15 min
60 min
0.5 		60 sec
10 min
60 min
0.5 		Global land reasonable 2025-12-05 New source to be determined Values discussed with ET-SWX. Submitted by Kirsti Kauristie AA 1.3 POC. Relevant publications: RADIO SCIENCE, VOL. 44, RS2016, doi:10.1029/2008RS003955, 2009 RADIO SCIENCE, VOL. 44, RS2017, doi:10.1029/2008RS003956, 2009 Parameter derived from ionosonde measurements. Provides estimate of maximum electron density at ionospheric F2 layer Attributes for uncertainty and stability need still additional discussions among the community.