Requirement #721 


For variable: Air pressure (near surface)

In application: Aeronautical Meteorology

Goal Breakthrough Threshold
Uncertainty 0.25 hPa 0.5 hPa 2 hPa
Stability/decade (if applicable)
Horizontal Resolution
Vertical Resolution
Observing Cycle 30 min 60 min 2 h
Timeliness 5 min 10 min 30 min


Validated: 1/22/18 Source: J van der Meulen
Comment: At the aerodrome; to derive QNH [and QFE]; not typically measured at 2 m height. source: ICAO Annex 3 (requirements) Confidence: firm
Def: :Result of impact studies of actual data used in actual applications of numerical or conceptual models
  • Domain: Atmosphere
    • Subdomain: Basic atmospheric