• WELCOME
  • ATMOSPHERE
    • Introduction
    • Definition
    • Structure of the atmosphere
    • Composition of the atmosphere
    • Atmosphere & UAS operations
  • ISA
    • Introduction
    • Definition
    • ISA & UAS operations
  • TEMPERATURE
    • Introduction
    • Definition
    • Measuring temperature
    • Units & scales
    • Temperature variation with altitude
    • Temperature inversions
    • Diurnal temperature variation
    • Factors influencing temperature
    • Temperature & UAS operations
  • ATMOSPHERIC PRESSURE
    • Introduction
    • Definition & units
    • Atmospheric pressure variation with altitude
    • Measuring atmospheric pressure
    • QFE, QFF, QNH
    • Pressure systems
  • ALTIMETERY
    • Introduction
    • Altimeter
    • Altimeter settings
    • Terminology
    • Altimetry and UAS operations
  • AIR DENSITY
    • Introduction
    • Definition & units
    • Lift formula
    • Air density & UAS operations
  • WINDS
    • Introduction
    • Measuring the wind
    • Winds above the friction layer - Theory
    • Winds above the friction layer - Explanation
    • Surface winds
    • Sea breeze & land breeze
    • Mountain winds
    • Winds & UAS operations
  • METEOROLOGICAL INFORMATION
    • Introduction
    • Preface
    • METAR - SPECI - TAF
  • STRUCTURE AND DECODING OF A METAR MESSAGE
    • METAR layout
    • MSG type, Aerodrome & time
    • Wind
    • Visibility
    • Weather & clouds
    • Meteorology charts
    • Temperature
    • Atmospheric pressure (QNH)
    • Trend
    • Remarks
    • SPECI
  • STRUCTURE AND DECODING OF A TAF MESSAGE
    • Layout
    • Evolution groups
    • Remarks
    • Meteorological information & UAS operations
  • CONCLUSION
    • Conclusion