Persistent DyNAMICS: Remote Sensing Based on Domain-Informed Analytics
Abstract not provided.
Publications
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Jump to search filtersFraunhofer Line Discrimination (FLD)
Abstract not provided.
Remote sensing with gas filter correlation radiometry
Abstract not provided.
PD UITI poster
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PD UITI poster
Abstract not provided.
Multi-mode Observations of Cloud-to-Ground Lightning Strokes
Abstract not provided.
Improvements to a High Spectral Resolution Radiation-Hydrodynamics Model of a Lightning Return Stroke and Comparison with Measured Spectra
Abstract not provided.
Hyper-spectral hyper-temporal lightning data collections
Abstract not provided.
Comparison of Modeled and Measured High-Resolution Optical Spectra from Lightning
Abstract not provided.
Modeling, sensor design, and performance predictions for gas filter correlation radiometers
Abstract not provided.
Copy of Optical design and performance testing of an athermal SWIR gas correlation imager (PRESENTATION)
Abstract not provided.
A fast partial Fourier transform (FPFT) for data compression and filtering
Proceedings of SPIE - The International Society for Optical Engineering
A discrete Fourier transform (DFT) or the closely related discrete cosine transform (DCT) is often employed as part of a data compression scheme. This paper presents a fast partial Fourier transform (FPFT) algorithm that is useful for calculating a subset of M Fourier transform coefficients for a data set comprised of N points (M < N). This algorithm reduces to the standard DFT when M = 1 and it reduces to the radix-2, decimation-in-time FFT when M = N and N is a power of 2. The DFT requires on the order of MN complex floating point multiplications to calculate M coefficients for N data points, a complete FFT requires on the order of (N/2)log2N multiplications independent of M, and the new FPFT algorithm requires on the order of (N/2)log2M + N multiplications. The FPFT algorithm introduced in this paper could be readily adapted to parallel processing. In addition to data compression, the FPFT algorithm described in this paper might be useful for very narrow band filter operations that pass only a small number of non-zero frequency coefficients such that M ≪ N. © 2010 Copyright SPIE - The International Society for Optical Engineering.
Adaptive optics and phase diversity imaging for responsive space applications
The combination of phase diversity and adaptive optics offers great flexibility. Phase diverse images can be used to diagnose aberrations and then provide feedback control to the optics to correct the aberrations. Alternatively, phase diversity can be used to partially compensate for aberrations during post-detection image processing. The adaptive optic can produce simple defocus or more complex types of phase diversity. This report presents an analysis, based on numerical simulations, of the efficiency of different modes of phase diversity with respect to compensating for specific aberrations during post-processing. It also comments on the efficiency of post-processing versus direct aberration correction. The construction of a bench top optical system that uses a membrane mirror as an active optic is described. The results of characterization tests performed on the bench top optical system are presented. The work described in this report was conducted to explore the use of adaptive optics and phase diversity imaging for responsive space applications.
Comparison of different modes of phase diversity imaging with adaptive optics
Abstract not provided.
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