Results 161 to 170 of about 1,044 (196)

Water Depth Retrieval in the Everglades Using Cygnss

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
Quantitative observations of dynamic changes in water extent and depth of the world's wetlands are currently limited by traditional remote sensing methods, which have difficulty observing surface water beneath dense vegetation and clouds. A novel remote sensing technique known as GNSS Reflectometry (GNSS-R) has shown great potential in the detection of
Brandi Downs, Andrew O'Brien 0001, Mary Morris, Cinzia Zuffada   +3 more
openaire   +2 more sources

The NASA CYGNSS microsat constellation

CubeSats and SmallSats for Remote Sensing IV, 2020
The CYGNSS constellation of eight satellites was launched in December 2016 into a low inclination Earth orbit. Each satellite carries a four-channel bi-static radar receiver which measures signals transmitted by GPS satellites and scattered back into space by the Earth surface.
Christofer S. Ruf, Clara Chew, Darren McKague, Shakeel Asharaf, Mahta Moghaddam   +4 more
openaire   +1 more source

First Results on Differential Phase Altimetry with CYGNSS

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023
Phase altimetry has been recently introduced for high precision surface height measurements in satellite global navigation satellite system reflectometry. In the presence of coherent scattering the effectiveness of the technique has been demonstrated for sea surface at low grazing angle as well as for rivers and lakes.
Addabbo P., Di Bisceglie M., Comite D., Galdi C., Neira M. M., Pierdicca N.   +5 more
openaire   +2 more sources

Storm surge prediction with cygnss winds

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The NASA Earth Venture Cyclone Global Navigation Satellite System (CYGNSS) is a constellation of eight observatories in a 35° inclination, ∼530 km altitude Earth orbit. Each observatory carries a 4-channel bistatic wind scatterometer receiver. Measurements of the ocean surface scattering cross section are converted to 10 meter-referenced wind speed ...
April M. Warnock, Christopher S. Ruf, Mary Morris   +2 more
openaire   +2 more sources

Investigating “rapid revisit” observations of cygnss

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The Cyclone Global Navigation Satellite System (CYGNSS) mission launched Dec. 2016 and will provide ocean surface wind speed measurements from an eight satellite constellation using GPS reflectometry observations. The nature of CYGNSS coverage results in some locations on Earth experiencing multiple wind speed measurements within a short period of time
Jeonghwan Park 0001, Joel T. Johnson, Andrew O'Brien 0001, Yuchan Yi   +3 more
openaire   +2 more sources

The GNSS-R Cygnss Mission: an Update

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
The CYGNSS constellation was successfully launched on 15 Dec 2016 and has been operating continuously in science data-taking mode since March 2017. Updates will be presented on the mission status, calibration and validation activities for its science data products, and recent scientific applications of the measurements.
Chris Ruf, Darren McKague, Mary Morris, Derek J. Posselt, Mahta Moghaddam   +4 more
openaire   +2 more sources

An Assessment of CYGNSS Ocean Wind Speed Products

2021
<p>Global Navigation Satellite System-Reflectometry (GNSS-R) is an innovative and rapidly developing approach to Earth Observation that makes use of signals of opportunity from Global Navigation Satellite Systems, which have been reflected off the Earth’s surface.
Hammond, Matthew, Foti, Giuseppe, Gommenginger, Christine, Srokosz, Meric, Floury, Nicolas   +4 more
openaire   +2 more sources

CYGNSS Observations of Ocean Winds and Waves

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
The cyclone global navigation satellite system (CYGNSS), launched on December 15, 2016, represents the first dedicated GNSS-R satellite mission specifically designed to retrieve ocean surface wind speeds in the Tropical Cyclone (TC) environment [1]. CYGNSS uses a constellation of eight microsatellite observatories that can receive both the direct and ...
Paul S. Chang, Zorana Jelenak, Faozi Said, Seubson Soisuvarn   +3 more
openaire   +1 more source

Soil Moisture Estimation Using CYGNSS Constellation

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
The main objective of this study is to propose an inversion algorithm for the estimation of soil moisture from CYGNSS data. The algorithm based on the change detection technique is applied to CYGNSS data after several corrections taking in account the incidence effects as well as different noises. The algorithm is validated on a one study site in North
Zribi, Mehrez, Huc, Mireille, Antokoletz, Sebastian, Le Page, Michel, Pierdicca, Nazzareno, Baghdadi, Nicolas   +5 more
openaire   +3 more sources

The nasa cygnss mission: Overview and status update

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The NASA Earth Venture Cyclone Global Navigation Satellite System (CYGNSS) is a constellation of eight microsatellite observatories that was launched into a low (35°) inclination, low Earth orbit on 15 December 2016. Each observatory carries a 4-channel GNSS-R bistatic radar receiver.
Christopher Ruf, Scott Gleason 0001, Aaron J. Ridley, Randall Rose, John Scherrer   +4 more
openaire   +2 more sources