Requirement #611 


For variable: Spread F

In application: Space Weather

Goal Breakthrough Threshold
Uncertainty 1 km 5 km 50 km
Stability/decade (if applicable)
Horizontal Resolution 10 km 200 km 500 km
Vertical Resolution
Observing Cycle 5 min 15 min 60 min
Timeliness 60 sec 10 min 60 min


Validated: 5/1/11 Source: ICTSW-1
Comment: Vertical extent of disturbed F-region Confidence: tentative
Def: :Positive impact expected but not yet validated due to lack of suitable data and/or models
  • Domain: Outer Space
    • Subdomain: Ionospheric disturbances
      • Variable: Spread F
        • Applicable (vertical) layers:
          • Ionos
        • Horizontal Coverage: Global