Results 141 to 150 of about 333 (162)

Global Soil Moisture Estimation Using CYGNSS Data

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
In this paper, an approach for estimating soil moisture (SM) from Cyclone Global Navigation Satellite System (CYGNSS) data is developed. Here, a three-layer model of air, vegetation cover, and soil is proposed. In application, the surface reflectivity along with its statistics are derived from the CYGNSS data and the ancillary vegetation opacity data ...
Qingyun Yan, Shuanggen Jin, Weimin Huang, Yan Jia   +3 more
openaire   +1 more source

Vegetation Optical Depth Retrieval from CYGNSS Data

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
The Cyclone Global Navigation Satellite System (CYGNSS) observation received the Global Positioning System (GPS) signals with a revisit time in the range of 2.8 to 7.2 hours and have about a few kilometers of spatial resolution for coherent reflection and ∼25 km for incoherent reflection [1].
Xiaolan Xu, Simon Yueh, Rashmi Shah, Akiko Hayashi   +3 more
openaire   +1 more source

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   +1 more source

Ocean Surface Altimetry with CyGNSS

2017
CyGNSS is a constellation of 8 small satellites launched in December 2016 that carries the Surrey Satellite Technologies (SSTL) SGR-ReSI GNSS Reflections (GNSS-R) receiver. Developed as the primary science instrument for CyGNSS, the SGR-ReSI receiver performs real time onboard navigation and generates delay-Doppler correlation maps for Earth reflected ...
Jake, Mashburn, Axelrad, Penina, Lowe, Stephen, Zuffada, Cinzia, Masters, Dallas   +4 more
openaire   +1 more source

Monitoring Land Surface Hydrology Using Cygnss

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
The Cyclone Global Navigation Satellite System (CYGNSS) is a constellation of eight small satellites, each of which carries specialized GNSS receivers to record surface-reflected GNSS signals. The L-band signals recorded by CYGNSS have been shown to be sensitive to land surface hydrologic variables, including near-surface soil moisture and inundation ...
Clara Chew, Eric Small, Erika Podest
openaire   +1 more source

Inland Water Body Mapping Using CYGNSS Coherence Detection

IEEE Transactions on Geoscience and Remote Sensing, 2021
This work demonstrates the creation of dynamic inland water body masks at spatial resolutions ranging from 1 to 3 km through the use of a recently developed coherence detector for the delay-Doppler maps produced by the cyclone global navigation satellite system (CYGNSS) constellation.
Mohammad M. Al-Khaldi, Joel T. Johnson, Scott Gleason, Clara C. Chew, Cynthia Gerlein-Safdi, Rashmi Shah, Cinzia Zuffada   +6 more
openaire   +1 more source

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, Mary Morris, Cinzia Zuffada   +3 more
openaire   +1 more source

CYGNSS: NASA Earth Venture Tropical Cyclone Mission

SPIE Proceedings, 2014
The NASA Earth Venture Cyclone Global Navigation Satellite System (CYGNSS) is a spaceborne mission scheduled to launch in October 2016 that is focused on tropical cyclone (TC) inner core process studies. CYGNSS attempts to resolve one of the principle deficiencies with current TC intensity forecasts, which lies in inadequate observations and modeling ...
Christopher Ruf, Paul Chang, Maria Paola Clarizia, Zorana Jelenak, Aaron Ridley, Randall Rose   +5 more
openaire   +1 more source

Cygnss Soil Moisture Estimation Using Machine Learning Regression

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
Global Navigation Satellite System-Reflectometry (GNSS-R) can retrieve Earth's surface parameters, such as soil moisture (SM) using the reflected signals transmitted from GNSS constellations. GNSS-R has advantages of non-contact, large coverage area, real-time, and continuity.
Yan Jia, Qingyun Yan, Shuanggen Jin, Patrizia Savi   +3 more
openaire   +2 more sources

Assessment of CYGNSS Coastal Wind Speed Retrieval

2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall), 2019
GNSS-R techniques have shown their capability of observing ocean environment parameters, such as wave height, sea surface height, sea surface wind speed, and snow and sea ice characterization. It has become one of the research hotspots in remote sensing detection and navigation technology at home and abroad.
Xiaohui Li, Dongkai Yang, Jingsong Yang, Gang Zheng   +3 more
openaire   +1 more source