Computer Science
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4007..694m&link_type=abstract
Proc. SPIE Vol. 4007, p. 694-704, Adaptive Optical Systems Technology, Peter L. Wizinowich; Ed.
Computer Science
Scientific paper
The low-frequency behavior of atmospherically distorted wavefronts is not accurately known at this time. It is expected that the phase delays will be a zero mean random process. A new zero-low-frequency model of spatial PSD of the phase distortions is presented in this paper. This model has a low frequency, called the roll-over frequency, for which the PSD starts to approach zero as the frequency decreases and approaches zero. This roll-over frequency is proportional to the outer-scale of turbulence. To verify the zero-low- frequency model, wavefront slope data was analyzed from the GSM experiment with a nonlinear modelling technique called Robust Orthogonal Search (ROS). One property of ROS is that it can detect frequency components at frequencies lower than the resolution of the discrete Fourier transform. This investigation consistently indicates a lowest frequency in the data for which any lower frequency components have lower power. This results supports the low-frequency model which rolls over and approaches zero for low spatial frequencies.
Aitken George J.
McGaughey Donald R.
No associations
LandOfFree
Measuring and modeling the low-frequency behavior of atmospheric distortion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Measuring and modeling the low-frequency behavior of atmospheric distortion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring and modeling the low-frequency behavior of atmospheric distortion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1481198