Dryden Wind Turbulence Model
The Dryden wind turbulence model, also known as Dryden gusts, is a mathematical model of continuous gusts accepted for use by the United States Department of Defense in certain aircraft design and simulation applications. The Dryden model treats the linear and angular velocity components of continuous gusts as spatially varying stochastic processes and specifies each component's power spectral density.
Source: Wikipedia — Dryden Wind Turbulence Model (CC BY-SA 4.0)