Selecting digital filters
Technique reduces task of filter design by using cut off frequency, termination frequency and weight number to determine filter effect on frequency domain of digital filter input data function.
Demandel, R. E.↗
Engineering topics
Demandel, R. E.
Publications and source records attributed to Demandel, R. E..
Aerodynamic properties of spherical balloon wind sensors.
A first-order theory of the fluctuating lift and drag coefficients associated with the aerodynamically induced motions of rising and falling spherical wind sensors is developed. The equations of motion of a sensor are perturbed about an equilibrium state in which the buoyancy force balances the mean vertical drag force. It is shown that, to within first order in perturbation quantities, the aerodynamic lift force is confined to the horizontal, and the fluctuating drag force associated with fluctuations in the drag coefficient acts along the vertical. The perturbation equations are transformed with Fourier-Stieltjes integrals. The resulting equations lead to relationships between the power spectra of the aerodynamically induced velocity components and the spectra of the fluctuating lift and drag coefficients.
Fichtl, G. H.↗
Mesoscale wave motions as revealed by improved wind profile measurements.
Mesoscale structure of atmospheric winds analyzed using data obtained from FPS-16 radar/Jimsphere precision wind measuring system
ATMOSPHERIC CIRCULATION↗