Results 151 to 160 of about 843 (193)

Analysis of CYGNSS Data for Soil Moisture Retrieval

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
Data from the CYGNSS mission, originally conceived to monitor tropical cyclones, are being investigated here for land applications as well. In this paper, a methodology for soil moisture (SM) retrieval from CYGNSS data is presented. The approach derives Level 3 gridded daily SM estimations, over the latitudinal band covered by CYGNSS, at a resolution ...
Maria Paola Clarizia, Nazzareno Pierdicca, Nicolas Floury   +2 more
exaly   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Cygnss constellation intercalibration

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The Cyclone Global Navigation Satellite System (CYGNSS) mission uses a constellation of 8 satellites to measure ocean winds in the tropics with high temporal resolution (∼3 hr median, 7 hr mean revisit). Focusing on the measurement of winds in tropical cyclones, each satellite contains a Global Navigation Satellite System reflectometry (GNSS-R ...
Darren S. McKague, Christopher S. Ruf
openaire   +1 more source

An Evaluation of NOAA CyGNSS Winds Derived from v3.0 CyGNSS Normalized Bistatic Radar Cross Section

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
The NOAA track-wise algorithm, used to infer sea surface wind speed from CyGNSS normalized bistatic radar cross section (NBRCS), is being used in conjunction with v3.0 NBRCS. A performance analysis is provided where NOAA CyGNSS winds derived from v2.1 NBRCS are compared with those derived from v3.0 NBRCS, using available data from August 2018 to ...
Faozi Saïd, Zorana Jelenak, Paul S. Chang   +2 more
openaire   +1 more source

On-Orbit Trending of CYGNSS Data

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Shortly after its launch in December of 2016, the Cyclone Global Navigation Satellite System (CYGNSS) constellation began producing estimates of sea surface wind speeds. With its unique remote sensing method and use of eight satellites, the constellation is able to produce winds with shorter revisit times and in more intense weather than other sea ...
Darren S. McKague, Christopher S. Ruf
openaire   +1 more source

Comparing the cygnss simulator forward scattering model with TDS-1 and cygnss on-orbit DDMS

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The CYGNSS (Cyclone GNSS) Mission is a constellation of 8 micro-satellites successfully launched in December 2016. Each satellite carries a GNSS-R (Global Navigation Satellite System Reflectometry) receiver which forms a Level-1 delay-Doppler map (DDM) measurement of reflected GPS L1 C/A-coded signals off the surface of the Earth.
Andrew O'Brien 0001, Joel T. Johnson
openaire   +1 more source

The CYGNSS nanosatellite constellation hurricane mission

2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
The Cyclone Global Navigation Satellite System (CYGNSS) is a spaceborne mission concept focused on tropical cyclone (TC) inner core process studies. CYGNSS attempts to resolve the principle deficiencies with current TC intensity forecasts, which lies in inadequate observations and modeling of the inner core.
Christopher S. Ruf, Scott Gleason 0001, Zorana Jelenak, Stephen J. Katzberg, Aaron J. Ridley, Randall Rose, John Scherrer, Valery U. Zavorotny   +7 more
openaire   +1 more source

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

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   +1 more source

Measuring Ice Thickness with Cygnss Altimetry

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Cyclone Global Navigation Satellite System (CYGNSS) is collecting GPS signals reflected from two high altitude lakes with ice cover during Winter 2017–2018. Coherent reflections occur at the ice/water interface and carrier phase altimetry is used to estimate the draft of the ice cover. Simulated data are created using a forward model. Signal processing
David Mayers, Chris Ruf
openaire   +1 more source

Earth antenna temperature variability for CYGNSS

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
Calibration algorithms are being developed for the CYclone Global Navigation Satellite System (CYGNSS) mission in anticipation of a late-2016 launch date. Antenna temperature (TA) of oceanic scenes will be used to confirm the relationship between receiver noise temperature and physical temperature—which will drift over time. In this work, we develop an
Mary Morris, David D. Chen, Christopher S. Ruf   +2 more
openaire   +1 more source