BackForward Variable: foEs

Full name foEs
Definition The highest ordinary-wave frequency reflected back from a sporadic E layer and observed by an ionosonde.
Measuring Units MHz Uncertainty Units MHz
Horizontal Res Units km Vertical Res Units
Stability Units MHz (Stability /decade)


Comment: Presence of Es layer affects radio wave propagation. Important parameter to diagnose telecommunications environment.
Last modified: 2014-11-28
Applied in OSCAR/Space Gap Analysis: No
  • Domain: Outer Space
    • Sub-domain: Ionospheric disturbances
      • Variable: foEs
        • Measured in Layers:
          • n/a (2D)
  • Cross-cutting themes:
  • Earth System Application Categories and its related Application Areas:
  • Unknown:

Requirements defined for foEs  (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, 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
581 foEs 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 Radio wave transmission condition