Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
It is the rate of change over a short duration. In wind shear,
it can refer to the frequent change in wind speed within a short
distance. It can occur vertically or horizontally. Directional
shear is a frequent change in direction within a short distance,
which can also occur vertically or horizontally. When used in
reference to Doppler radar, it describes the change in radial
velocity over short distances horizontally.