Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Barbara Tehan Landesman"'
Publikováno v:
Applied optics. 39(30)
A new technique for modeling image transfer through cirrus clouds is presented. The technique uses a ray trace to model beam propagation through a three-dimensional volume of polydisperse, hexagonal ice crystals. Beyond the cloud, the technique makes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5562a59b587ad0275a1e533b9dca221
https://pubmed.ncbi.nlm.nih.gov/18354542
https://pubmed.ncbi.nlm.nih.gov/18354542
Publikováno v:
SPIE Proceedings.
Large segmented and distributed aperture telescopes increasingly rely on innovative imaging techniques such as phase diversity and phase retrieval. These algorithms obtain the phase aberration in a dynamic system by different estimation techniques us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4eb8f0540a8e1d431a2f21d20b4b0d0b
https://doi.org/10.1117/12.461560
https://doi.org/10.1117/12.461560
Publikováno v:
Applied optics. 41(36)
A hybrid technique to simulate the imaging of space-based objects through cirrus clouds is presented. The method makes use of standard Huygens-Fresnel propagation beyond the cloud boundary and a novel vector trace approach within the cloud. At the to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f71ab8f800ace9ff2f6983ab297d323
https://pubmed.ncbi.nlm.nih.gov/12510928
https://pubmed.ncbi.nlm.nih.gov/12510928
Publikováno v:
SPIE Proceedings.
The use of segmented mirrors for the primary elements of large telescope systems is becoming increasingly popularowing to the cost effectiveness of the design. Likewise, the use of non-optical flat glass in large collectors can furtherreduce cost. Un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d416383a5057cfa59b2ccfe3275bc923
https://doi.org/10.1117/12.453218
https://doi.org/10.1117/12.453218
Publikováno v:
Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing.
This paper discussed a simulation fo the imaging of a space- based object through cirrus clouds. The wavefront reflected by the object is propagated to the top of the cloud using Huygens-Fresnel propagation theory. At the top of the cloud, the wavefr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91b70ebeb88d47155a1017f963517078
https://doi.org/10.1117/12.413828
https://doi.org/10.1117/12.413828
Publikováno v:
SPIE Proceedings.
Statistical variations in the size, position, shape, and orientation of hexagonal ice crystals in a three-dimensional volumecomplicates the modeling of image transfer through cirrus clouds. These variations will give rise to fluctuations in imagequal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57011e8e05cead1c96c918d624b0af88
https://doi.org/10.1117/12.409297
https://doi.org/10.1117/12.409297
Publikováno v:
SPIE Proceedings.
We apply out previously-developed turbid-media backpropagation algorithm to imaging extended objects imbedded in turbid media such as clouds. Although the backpropagation algorithm was developed initially for biomedical applications, the underlying d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e99d6e76aa2bb5fb4afc45cfce86e687
https://doi.org/10.1117/12.371336
https://doi.org/10.1117/12.371336
Publikováno v:
SPIE Proceedings.
The authors present a wavefront reconstruction technique for beams forward scattered and back scattered through cirrus clouds. The technique uses ray distributions from the Coherent Illumination and Ray Trace Imaging Software for Cirrus which traces
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc6ec24a6b0d2dd2c03ab5d5a9300305
https://doi.org/10.1117/12.371334
https://doi.org/10.1117/12.371334
Publikováno v:
SPIE Proceedings.
The authors present a novel simulation for studying the interaction of coherent illumination with cirrus clouds. The software traces the propagation and E field vectors through a 3D volume of ice crystal in the shape of columns, plates, bullets, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31ccf095877bbbcbde06c1479d12977d
https://doi.org/10.1117/12.332403
https://doi.org/10.1117/12.332403
Publikováno v:
SPIE Proceedings.
The speckle size metric known as power-averaged speckle size (PASS), which is based on the integral of the power spectral density of the data, is insensitive to target asymmetry. PASS is defined as the inverse of the median frequency of the power spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::665b675c0228d7e0bd788ea06b0e125b
https://doi.org/10.1117/12.331852
https://doi.org/10.1117/12.331852