A Correlated-k Based Ultra-Fast Radiative Transfer (kURT) Method

Acharya, Prabhat K.; Panfili, R.; Berk, Alexander; Adler‐Golden, Steven M.; Fox, Marsha J.; Wetmore, Alan; Alber, Irwin E.

doi:10.21236/ada450014

Cited by 2 publications

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“…Note that MODTRAN had to be modified to output the kdb. More on the kdb and ckdb, including their generation, use and dependence on atmospheric pressure and temperature is described in the earlier SPIE papers 5,6 . There we also describe how blackbody, aerosol.…”

Section: Methodology Of Kurt-msmentioning

confidence: 99%

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Correlated- k based fast accurate bandpass radiance and transmittance calculations for hyperspectral and multispectral scenes

et al. 2007

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The ability to rapidly calculate at-sensor radiance over a large number of lines of sight (LOSs) is critical for hyperspectral and multispectral scene simulations and look-up table generation, both of which are increasingly used for sensor design, performance evaluation, data analysis, and software and systems evaluations. We have demonstrated a new radiation transport (RT) capability that combines an efficient multiple-LOS (MLOS) multiple scattering (MS) algorithm with a broad-bandpass correlated-k methodology called kURT-MS, where kURT stands for correlated-k-based Ultra-fast Radiative Transfer. The MLOS capability is based on DISORT and exploits the existing MODTRAN-DISORT interface. kURT-MS is a new sensor-specific fast radiative transfer formalism for UV-visible to LWIR wavelengths that is derived from MODTRAN's correlated-k parameters. Scattering parameters, blackbody and solar functions are cast as a few sensor-specific and bandpass-specific k-dependent source terms for radiance computations. Preliminary transmittance results are within 2% of MODTRAN with a two-orders-of-magnitude computational savings. Preliminary radiance computations in the visible spectrum are within a few percent of MODTRAN results, but with orders of magnitude speed up over comparable MODTRAN runs. This new RT capability (embodied in two software packages: kURT-MS and MODTRAN-kURT) has potential applications for remote sensing applications such as hyperspectral scene simulation and look-up table generation for atmospheric compensation analysis as well as target acquisition algorithms for near earth scenarios.

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Section: Methodology Of Kurt-msmentioning

confidence: 99%

“…Thus there is a need to reduce the number of c-k terms in each layer transmittance. We have implemented a convolution-resampling (C-R) scheme to reduce the number of c-k terms for this purpose as described in references 5,6 . The method, shown in Fig.…”

Section: Methodology Of Kurt-msmentioning

confidence: 99%

Correlated- k based fast accurate bandpass radiance and transmittance calculations for hyperspectral and multispectral scenes

et al. 2007

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“…However, pathways with shared biology were present within each group; for example TRAIN-CL included the pathways dme04330 'Notch signaling' and dme04914 'Progesterone-mediated oocyte maturation', which are related by notch involvement in oogenesis (López-Schier and St Johnston, 2001;Schmitt and Nebreda, 2002). TEST-CL also included the related pathways dme04745 'Phototransduction' and dme00600 'Sphingolipid metabolism', for example where ceramide kinase regulates photoreceptor homeostasis (Acharya et al, 2003;Dasgupta et al, 2009;Yonamine et al, 2011).…”

Section: Netnc Benchmarking and Parameter Optimisationmentioning

confidence: 99%

Functionally Coherent Transcription Factor Target Networks Illuminate Control of Epithelial Remodelling

et al. 2018

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Cell identity is governed by gene expression, regulated by Transcription Factor (TF) binding at cisregulatory modules. We developed the NetNC software to decode the relationship between TF binding and the regulation of cognate target genes in cell decision-making; demonstrated on nine datasets for the Snail and Twist TFs, and also modENCODE 'HOT' regions. Results illuminated conserved molecular networks controlling development and disease, with implications for precision medicine. Predicted 'neutral' TF binding accounted for the majority (50% to ≥80%) of candidate target genes from statistically significant peaks and HOT regions had high functional coherence.Expression of orthologous functional TF targets discriminated breast cancer molecular subtypes and predicted novel tumour biology. We identified new gene functions and network modules including crosstalk with notch signalling and regulation of chromatin organisation, evidencing networks that reshape Waddington's landscape during epithelial remodelling. Predicted invasion roles were validated using a tractable cell model, supporting our computational approach.

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A Correlated-k Based Ultra-Fast Radiative Transfer (kURT) Method

Cited by 2 publications

References 1 publication

Correlated- k based fast accurate bandpass radiance and transmittance calculations for hyperspectral and multispectral scenes

Correlated- k based fast accurate bandpass radiance and transmittance calculations for hyperspectral and multispectral scenes

Functionally Coherent Transcription Factor Target Networks Illuminate Control of Epithelial Remodelling

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