Zobrazeno 1 - 10
of 411
pro vyhledávání: '"Joel T., Johnson"'
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 16426-16432 (2024)
This works reports updates to a previously-reported time-series ratio (TSR) algorithm for surface soil moisture retrieval from Cyclone Global Navigation Satellite System (CYGNSS) reflectivity data. Both the original and updated algorithms are based o
Externí odkaz:
https://doaj.org/article/ab38385e367f4405ae5479bfbdc96134
Autor:
Mohammad M. Al-Khaldi, Joel T. Johnson, Dustin Horton, Darren S. McKague, Dorina Twigg, Anthony Russel, Frederick S. Policelli, Jeffrey D. Ouellette, Rajat Bindlish, Jeonghwan Park
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 15480-15493 (2024)
An analysis of a Level-2 (L2) soil moisture record extending from 1 May 2021 to 1 January 2024 derived from Spire, Inc.’s Global Navigation Satellite System Reflectometry (GNSS-R) observatories is presented. The product's sensitivity to large scale
Externí odkaz:
https://doaj.org/article/a68cc913b8044dce93553b961fea8e0e
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 12959-12968 (2024)
The NASA ISRO synthetic aperture radar (NISAR) mission scheduled for launch in 2024 will provide global L-band radar observations that can be applied to estimate land surface soil moisture. The mission's soil moisture product will be provided at 200-
Externí odkaz:
https://doaj.org/article/974a95ecdf1f46e0bfac07e6b8ab18d4
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 9090-9098 (2024)
The use of measurements from NASA's CYGNSS mission for the mapping of inland water bodies has been extensively demonstrated in past works. Despite this progress, the use of CYGNSS measurements for monitoring dynamic properties of water bodies, such a
Externí odkaz:
https://doaj.org/article/b70f311b2e864bae914ddc6a3a530eaf
Autor:
James Gaudreau, Ethan Raines, Joel T. Johnson, James L. Garrison, Jeffrey D. Ouellette, Rashmi Shah
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 8020-8027 (2024)
Ocean wave periods are estimated using measurements of S-band signals-of-opportunity reflections from the sea surface. The measurements were collected on an oil platform and show a time evolving Doppler centroid frequency and spectral width due to th
Externí odkaz:
https://doaj.org/article/7c0a981581d94f51948056c8dfe689d4
Autor:
Younghun Kang, Ethan Kubatko, Mohammad M. Al-Khaldi, Joel T. Johnson, Suranjan Nepal, Aaron Sines
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 3791-3798 (2024)
This work assesses the impact of the Cyclone Global Navigation Satellite System (CYGNSS) (full delay-Doppler map) informed wind fields on storm surge simulations using the constellation's storm observations. In order to assess the impact of the CYGNS
Externí odkaz:
https://doaj.org/article/feb7443892be4d33aaf78e52a98c3cfd
Autor:
Dustin Horton, Joel T. Johnson, Ismail Baris, Thomas Jagdhuber, Rajat Bindlish, Jeonghwan Park, Mohammad M. Al-Khaldi
Publikováno v:
Remote Sensing, Vol 16, Iss 16, p 3050 (2024)
To address the recent increase in wildfire severity and incidence, as well as the subsequent financial and physical costs, forest managers and wildland firefighting agencies rely on remotely sensed products for better decision-making and mitigation e
Externí odkaz:
https://doaj.org/article/b4bf88a93cbd43029ec6a1790f0a0384
Autor:
Ferran Hernández-Macià, Carolina Gabarró, Marcus Huntemann, Reza Naderpour, Joel T. Johnson, Kenneth C. Jezek
Publikováno v:
Annals of Glaciology, Vol 65 (2024)
The retrieval of sea ice thickness using L-band passive remote sensing requires robust models for emission from sea ice. In this work, measurements obtained from surface-based radiometers during the MOSAiC expedition are assessed with the Burke, Wilh
Externí odkaz:
https://doaj.org/article/fd9e8045dfbe460897bb991ea1d87441
Publikováno v:
Journal of Glaciology, Vol 68, Pp 1027-1037 (2022)
Ice internal temperature and basal geothermal heat flux (GHF) are analyzed along a study line in northwestern Greenland. The temperatures were obtained from a previously reported inversion of airborne microwave brightness-temperature spectra. The tem
Externí odkaz:
https://doaj.org/article/d6864c6d556944cb938ee4f4a34bdf5f
Autor:
Peter John‐Baptiste, Aaron Brandewie, Joe Vinci, Kristine Bell, Joel T. Johnson, Christopher F. Neese, Muralidhar Rangaswamy
Publikováno v:
IET Radar, Sonar & Navigation, Vol 16, Iss 4, Pp 692-703 (2022)
Abstract This study investigates the use of adaptive radar waveforms in performing a multi‐task operation involving the tracking and classification of a single target. The work applies a previously reported hierarchical fully adaptive radar framewo
Externí odkaz:
https://doaj.org/article/a04142492baf4b5b9c09fb83158365d3