Aviation Applications Program (AAP)


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Providing advanced weather technologies to support aviation and space operations

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Aviation weather represents the majority of RAL's work. Within the aviation application area, our current research emphases are: in–flight icing; snowfall and freezing precipitation; convective storm nowcasting and forecasting; atmospheric turbulence; numerical weather prediction; remote sensing; data assimilation; precipitation physics; ceiling and visibility; oceanic weather; and verification methods. Development of useful aviation applications requires a strong connection between our work and the needs of aviators. End–user requirements are considered at each step along the development path. Our work tends to be heavily oriented toward real–time operational systems and this focus leads to an emphasis on algorithm development, specialized graphical displays, systems engineering, operational demonstrations, and the associated scientific validations and user–oriented evaluations.

Aviation Applications Projects


Dual Polarization
Icing Hazard Level Index
NCAR Turbulence Detection Algorithm (NTDA)

FAA Sensor Network Assessment

Numerical Modeling

Consolidated Storm Prediction for Aviation

In-Flight Icing

In-Flight Icing Product Development Team
Advanced Satellite Aviation Weather Products (ASAP) Program
High Ice Water Content (HIWC) Research
NASA Icing Remote Sensing System (NIRSS)
Icing Hazard Level Index

Aviation Turbulence

Graphical Turbulence Guidance Nowcast (GTGN)
Diagnose Convectively–Induced Turbulence (DCIT)
Turbulence characterization
Aviation turbulence forecasting (GTG and GTG2)
In Situ Turbulence

Ceiling and Visibility

National Ceiling and Visibility Analysis (NCVA)

Oceanic/Remote Weather

Oceanic Convection and Nowcasting
Oceanic Turbulence

Forecaster–Over–the–Loop Studies

Human Over the Loop (HOTL)


Aviation Digital Data Service (ADDS)
Experimental ADDS
NextGen Network Enabled Weather
Weather Technology in the Cockpit (WTIC)
Helicopter Emergence Medical Services (HEMS) Tool

Weather Integration Into Decision Making

Probabilistic Weather Integration with (ATM)
Winter Weather Research and Development

Satellite Applications

Terminal Area Weather

Low Level Windshear Alert System (LLWAS)
NASA Icing Remote Sensing System (NIRSS)
Juneau Airport Winds System
Taiwan ( AOAWS)
WTWS - Hong Kong
Icing Hazard Level Index

Terrain-Induced Wind Shear and Turbulence (Juneau)

Juneau Airport Wind System (JAWS)

International Aviation Weather System

Advanced Operational Aviation Weather system (AOAWS)
Wind Shear System Consultancy Services
Low Level Windshear Alert System (LLWAS)
Windshear and Turbulence Warning System - Hong Kong

Note: full phone: 303 - 497 - XXXX | email addresses end in "@ucar.edu"

Primary Contacts

  • CARMICHAEL, Bruce | AAP DIRECTOR | ph: 8406 | email: brucec
  • BARRON, Bob | AAP DEPUTY DIRECTOR | ph: 8410 | email: bob
  • POLITOVICH, Marcia | AAP DEPUTY DIRECTOR | ph: 8449 | email: marcia