Results 1 to 10 of about 284 (118)

Cramer–Rao Lower Bound for SoOp-R-Based Root-Zone Soil Moisture Remote Sensing [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Signals of opportunity (SoOp) reflectometry (SoOp-R) is a maturing field for geophysical remote sensing as evidenced by the growing number of airborne and spaceborne experiments.
Dylan Ray Boyd, Ali Cafer Gurbuz, Mehmet Kurum, James L. Garrison, Benjamin R. Nold, Jeffrey R. Piepmeier, Manuel Vega, Rajat Bindlish   +7 more
doaj   +2 more sources

A Spaceborne Demonstration of P-Band Signals-of-Opportunity (SoOp) Reflectometry

IEEE Geoscience and Remote Sensing Letters, 2023
<p>Land-reflected signals from a geosynchronous communication satellite broadcasting in P-band (367.5 MHz) were captured in low Earth orbit using a simple dipole antenna. A delay-Doppler map (DDM) was generated through autocorrelation. Estimates of the specular point delay were obtained from the lag of the second peak in the DDM with a bias of ...
James L. Garrison, Benjamin Nold, Dallas Masters, Conor Brown, Jordan Bridgeman, Justin Mansell, Manuel Vega, Rajat Bindlish, J. R. Piepmeier, Sachidananda R. Babu   +9 more
openaire   +2 more sources

A Satellite Synthetic Aperture Radar Concept Using P-Band Signals of Opportunity

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The spaceborne aperture radar (SAR) technique based on a combination of P-band signals of opportunity (SoOp) reflectometry with a sparse array of receivers at low earth orbits (LEOs) and transmit signals from the United States Navy's Mobile User ...
Simon H. Yueh, Rashmi Shah, Xiaolan Xu, Bryan Stiles, Xavier Bosch-Lluis   +4 more
doaj   +2 more sources

Bistatic scattering simulations of circular and linear polarizations over land surface for signals of opportunity reflectometry

Geoscience Letters, 2021
Signals of Opportunity Reflectometry (SoOp-R) employs the communication system, GNSS (Global Navigation Satellite System) constellation and other potential Signals of Opportunity (SoOp) as the transmitters.
Xuerui Wu, Yezhi Song, Jin Xu, Zheng Duan, Shuanggen Jin   +4 more
doaj   +2 more sources

SCoBi Multilayer: A Signals of Opportunity Reflectometry Model for Multilayer Dielectric Reflections

Remote Sensing, 2020
A multilayer module is incorporated into the Signals of Opportunity (SoOp) Coherent Bistatic Scattering model (SCoBi) for determining the reflections and propagation of electric fields within a series of multilayer dielectric slabs.
Dylan Boyd, Mehmet Kurum, Orhan Eroglu, Ali Cafer Gurbuz, James L. Garrison, Benjamin R. Nold, Manuel A. Vega, Jeffrey R. Piepmeier, Rajat Bindlish   +8 more
doaj   +2 more sources

Estimating spatiotemporally continuous snow water equivalent from intermittent satellite observations: an evaluation using synthetic data [PDF]

Hydrology and Earth System Sciences, 2023
Accurate estimates of snow water equivalent (SWE) based on remote sensing have been elusive, particularly in mountain areas. However, there now appears to be some potential for direct satellite-based SWE observations along ground tracks that only cover a
X. Ma, D. Li, D. Li, Y. Fang, S. A. Margulis, D. P. Lettenmaier, D. P. Lettenmaier   +6 more
doaj   +1 more source

Airborne P-band Signal of Opportunity (SoOP) demonstrator instrument; status update [PDF]

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
The instrument is currently under development with science flights planned aboard a Beechcraft Super King Air B200 aircraft. The flights will include NASA's SLAP L-Band radar and radiometer to provide coincident measurements. The instrument comprises two dual-polarization antennas (one each for sky and Earth views), a four-channel RF receiver with ...
Knuble, Joseph, Piepmeier, Jeffrey, Deshpande, Manohar, Toit, Cornelus Du, Garrison, James, Lin, Yao-Cheng, Georges, Stienne, Katzberg, Stephen, Alikakos, George   +8 more
openaire   +1 more source

Forest canopy scattering properties with signal of opportunity reflectometry: theoretical simulations

Geoscience Letters, 2021
In recent years, signal of opportunity reflectometry (SoOp-R) has become a promising remote sensing technique. This emerging technique employs the reflected signals from existing Global Navigation Satellite System (GNSS) or communication satellites to ...
Xuerui Wu, Andrés Calabia, Jin Xu, Weihua Bai, Peng Guo   +4 more
doaj   +1 more source

Development of VHF (240–270 MHz) antennas for SoOp (signal of opportunity) receiver for 6U Cubesat platforms [PDF]

2016 Progress in Electromagnetic Research Symposium (PIERS), 2016
The main goal of this research is to design, fabricate, and test deployable VHF antennas for 6U Cubesat platforms to enable validation of root zone soil moisture (RZSM) estimation algorithms for signal of opportunity (SoOp) remote sensing over the 240–270MHz frequency band.
A. T. Joseph, M. Deshpande, P. E. O'Neill, L. Miles   +3 more
openaire   +1 more source

Requirements for a Coastal Hazards Observing System

Frontiers in Marine Science, 2019
Coastal zones are highly dynamical systems affected by a variety of natural and anthropogenic forcing factors that include sea level rise, extreme events, local oceanic and atmospheric processes, ground subsidence, etc.
Jérôme Benveniste, Anny Cazenave, Stefano Vignudelli, Luciana Fenoglio-Marc, Rashmi Shah, Rafael Almar, Ole Andersen, Florence Birol, Pascal Bonnefond, Jérôme Bouffard, Francisco Calafat, Estel Cardellach, Paolo Cipollini, Gonéri Le Cozannet, Claire Dufau, Maria Joana Fernandes, Maria Joana Fernandes, Frédéric Frappart, James Garrison, Christine Gommenginger, Guoqi Han, Jacob L. Høyer, Villy Kourafalou, Eric Leuliette, Zhijin Li, Hubert Loisel, Kristine S. Madsen, Marta Marcos, Angélique Melet, Benoît Meyssignac, Ananda Pascual, Marcello Passaro, Serni Ribó, Remko Scharroo, Y. Tony Song, Sabrina Speich, John Wilkin, Philip Woodworth, Guy Wöppelmann   +38 more
doaj   +1 more source