Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Howard A Zebker"'
Autor:
Leah K Clayton, Kevin Schaefer, Michael J Battaglia, Laura Bourgeau-Chavez, Jingyi Chen, Richard H Chen, Albert Chen, Kazem Bakian-Dogaheh, Sarah Grelik, Elchin Jafarov, Lin Liu, Roger John Michaelides, Mahta Moghaddam, Andrew D Parsekian, Adrian V Rocha, Sean R Schaefer, Taylor Sullivan, Alireza Tabatabaeenejad, Kang Wang, Cathy J Wilson, Howard A Zebker, Tingjun Zhang, Yuhuan Zhao
Publikováno v:
Environmental Research Letters, Vol 16, Iss 5, p 055028 (2021)
Active layer thickness (ALT) is a critical metric for monitoring permafrost. How soil moisture influences ALT depends on two competing hypotheses: (a) increased soil moisture increases the latent heat of fusion for thaw, resulting in shallower active
Externí odkaz:
https://doaj.org/article/023a88a76dbf4b60aa4f92449a5739d9
Autor:
Roger J Michaelides, Kevin Schaefer, Howard A Zebker, Andrew Parsekian, Lin Liu, Jingyi Chen, Susan Natali, Sarah Ludwig, Sean R Schaefer
Publikováno v:
Environmental Research Letters, Vol 14, Iss 3, p 035007 (2019)
The Yukon–Kuskokwim (YK) Delta is a region of discontinuous permafrost in the subarctic of southwestern Alaska. Many wildfires have occurred in the YK Delta between 1971–2015, impacting vegetation cover, surface soil moisture, and the active laye
Externí odkaz:
https://doaj.org/article/11d82423fb7a4e4e86668f7f11510f99
Publikováno v:
Environmental Research Letters, Vol 9, Iss 8, p 084010 (2014)
Groundwater exploitation is a major cause of land subsidence, which in coastal areas poses a flood inundation hazard that is compounded by the threat of sea-level rise (SLR). In the lower Mekong Delta, most of which lies
Externí odkaz:
https://doaj.org/article/64a47fc6adac4ac8b519929aac80ab67
Autor:
Stacey A. Huang, Howard A. Zebker
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 9208-9225 (2022)
Persistent scatterer interferometric synthetic aperture radar (PS-InSAR) is a remote sensing technique that maps patterns of crustal deformation with large spatial coverage and fine resolution. By identifying a network of reliable points called persi
Externí odkaz:
https://doaj.org/article/324d8f4f3cd34a69abd629cf8ddc9cf4
Autor:
Stacey Huang, Howard A. Zebker
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 5518-5525 (2020)
Persistent scatterer (PS) techniques are a set of important time-series tools for interferometric synthetic aperture radar (InSAR) that enable deformation analysis in highly decorrelated terrain. Detailed knowledge of the statistics of persistent sca
Externí odkaz:
https://doaj.org/article/67bae43757a249b79b239cd87c22e42e
Autor:
Roger J. Michaelides, Richard H. Chen, Yuhuan Zhao, Kevin Schaefer, Andrew D. Parsekian, Taylor Sullivan, Mahta Moghaddam, Howard A. Zebker, Lin Liu, Xingyu Xu, Jingyi Chen
Publikováno v:
Earth and Space Science, Vol 8, Iss 7, Pp n/a-n/a (2021)
Abstract Interferometric synthetic aperture radar (InSAR) has been used to quantify a range of surface and near surface physical properties in permafrost landscapes. Most previous InSAR studies have utilized spaceborne InSAR platforms, but InSAR data
Externí odkaz:
https://doaj.org/article/c8387d153b1c415e8e73f24b8f86a4cd
Autor:
Richard H. Chen, Roger J. Michaelides, Yuhuan Zhao, Lingcao Huang, Elizabeth Wig, Taylor D. Sullivan, Andrew D. Parsekian, Howard A. Zebker, Mahta Moghaddam, Kevin M. Schaefer
Publikováno v:
Earth and Space Science. 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5148a7e291eae3c70b59c39f4b5c241c
https://doi.org/10.1029/2022ea002453
https://doi.org/10.1029/2022ea002453
Autor:
Kevin Schaefer, Lin Liu, Andrew Parsekian, Elchin Jafarov, Albert Chen, Tingjun Zhang, Alessio Gusmeroli, Santosh Panda, Howard A. Zebker, Tim Schaefer
Publikováno v:
Remote Sensing, Vol 7, Iss 4, Pp 3735-3759 (2015)
Active layer thickness (ALT) is a critical parameter for monitoring the status of permafrost that is typically measured at specific locations using probing, in situ temperature sensors, or other ground-based observations. Here we evaluated the Remote
Externí odkaz:
https://doaj.org/article/1bbf572ab2334272bd102638cece547d
Autor:
Marko Jakovljevic, Roger Michaelides, Ettore Biondi, Dongwoon Hyun, Howard A. Zebker, Jeremy J. Dahl
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 69(11)
Algorithmic changes that increase beamforming speed have become increasingly relevant to processing synthetic aperture (SA) ultrasound data. In particular, beamforming SA data in a spatio-temporal frequency domain using the F-k (Stolt) migration have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::716d242b99589c59abf348c91cf5e397
https://pubmed.ncbi.nlm.nih.gov/36094975
https://pubmed.ncbi.nlm.nih.gov/36094975
Autor:
Howard A. Zebker
Publikováno v:
IEEE Geoscience and Remote Sensing Letters. 18:1214-1218
Wide-swath radar imaging requires that the time interval to collect each radar pulse echo is large and can often exceed the interpulse period. As it is difficult to both transmit and receive from the same antenna simultaneously, there will be “blin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e6d71698bad6786b4e7362a31215647
https://doi.org/10.1109/lgrs.2020.2997310
https://doi.org/10.1109/lgrs.2020.2997310