BackForward Variable: Spread F

Full name Spread F
Definition Vertical thickness of highly structured ion density in the F-region of the ionosphere.
Measuring Units km Uncertainty Units km
Horizontal Res Units km Vertical Res Units
Stability Units km (Stability /decade)


Comment: Indication of vertical extension of Spread F, varying from o to ~300 km. Important parameter to classify the conditions for radio wave communications.
Last modified: 2014-03-27
Applied in OSCAR/Space Gap Analysis: No
  • Domain: Outer Space
    • Sub-domain: Ionospheric disturbances
      • Variable: Spread F
        • Measured in Layers:
          • Ionos
  • Cross-cutting themes:

Requirements defined for Spread F  (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
611 Spread F Ionos Space Weather 1 km
5 km
50 km
10 km
200 km
500 km
5 min
15 min
60 min
60 sec
10 min
60 min
Global tentative 2011-05-01 ICTSW-1