Assessment of CYGNSS Wind Speed Retrievals in Tropical Cyclones

Article Geochemistry & Geophysics

Diurnal Variations in Ocean Wind Speeds Measured by CYGNSS and Other Satellites

Yuchan Yi et al.

Summary: This study investigates diurnal wind variations over the tropical ocean using satellite data and compares the results with existing reanalysis products, showing good consistency.

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS (2022)

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Article Geochemistry & Geophysics

The NOAA Track-Wise Wind Retrieval Algorithm and Product Assessment for CyGNSS

Faozi Said et al.

Summary: A novel method for addressing calibration issues in the Cyclone Global Navigation Satellite System has been proposed using track-wise $sigma<^>o$ bias correction to improve signal sensitivity and remove calibration issues. By utilizing this method with corrected measurements, a wind retrieval approach was evaluated against various weather forecasting models and instruments, showing consistency and reliability for operational use.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2022)

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Article Meteorology & Atmospheric Sciences

Estimating tropical cyclone surface winds: Current status, emerging technologies, historical evolution, and a look to the future

John A. Knaff et al.

Summary: This article reviews the estimation of tropical cyclone surface winds from an operational forecasting perspective, discussing current and emerging objective estimates and suggesting future designs to include funding for real-time data delivery. Recommendations include sufficient surface coverage for complete analysis of TC surface wind fields and ensuring data quality for user needs.

TROPICAL CYCLONE RESEARCH AND REVIEW (2021)

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Article Engineering, Ocean

CYGNSS Ocean Surface Wind Validation in the Tropics

Shakeel Asharaf et al.

Summary: The NASA CYGNSS mission provides remote sensing of near-surface wind speed over tropical and subtropical oceans, meeting high-quality standards for wind speed uncertainty. The study demonstrates the potential utility of CYGNSS surface wind product in understanding air-sea interaction complexities, especially in regions with limited observational data from other platforms.

JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY (2021)

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Article Environmental Sciences

Examination of the Daily Cycle Wind Vector Modes of Variability from the Constellation of Microwave Scatterometers and Radiometers

Francis Joseph Turk et al.

Summary: The study explores the variability of diurnal wind direction in tropical regions, generating a multi-year dataset by merging different satellite data. It finds that there are different degrees of variations in the zonal and meridional wind components in the tropical Pacific, possibly due to interactions between surface convergence and convective precipitation in ocean basins.

REMOTE SENSING (2021)

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Article Environmental Sciences

Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction

Daniel Pascual et al.

Summary: This article introduces a method for improved estimation of sea surface wind speed measured by CYGNSS satellites using significant wave height as external reference data. By correcting a 2D look-up table with input from CYGNSS wind speed and collocated reference SWH, the sensitivity to large wind speeds increases and the root mean square difference with ECMWF winds decreases. The influence of ECMWF winds on the corrected winds is analyzed, showing no significant impact when compared with other reference data sources.

REMOTE SENSING (2021)

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Article Meteorology & Atmospheric Sciences

CYGNSS Observations and Analysis of Low-Latitude Extratropical Cyclones

Juan A. Crespo et al.

Summary: Latent and sensible heat fluxes over the oceans are crucial in the genesis and evolution of marine-based extratropical cyclones, impacting rapid cyclogenesis. Although limited by existing in situ and remote sensing platforms, the CYGNSS mission can observe ocean surface wind speed and heat fluxes in extratropical fronts and cyclones. These observations aid in understanding the role of surface processes in cyclone formation and evolution, providing a robust sample of winds and surface fluxes in comparison with reanalysis datasets.

JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY (2021)

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Article Environmental Sciences

Tropical Cyclone Wind Speeds from WindSat, AMSR and SMAP: Algorithm Development and Testing

Thomas Meissner et al.

Summary: Measuring ocean surface wind speeds in precipitation using satellite microwave radiometers is difficult due to rain attenuation and the similarity between rain and wind signals. Algorithms developed for WindSat and AMSR sensors use combinations of C-band and X-band channels to differentiate wind from rain. These algorithms, trained specifically under tropical cyclone conditions, perform well in precipitation where standard passive wind speed retrievals fail.

REMOTE SENSING (2021)

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Article Environmental Sciences

Validation of NOAA CyGNSS Wind Speed Product with the CCMP Data

Xiaohui Li et al.

Summary: The study evaluated the accuracy of NOAA's CyGNSS wind product compared to the CCMP wind product from RSS, revealing good agreement between the two but with negative deviation at high latitudes and positive deviation in certain regions such as the China Sea and Arabian Sea. These findings suggest geographical anomalies in the bias and standard deviation of CyGNSS winds, indicating a temporal dependency in wind speed bias.

REMOTE SENSING (2021)

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Review Environmental Sciences

The CYGNSS Mission: On-Going Science Team Investigations

Hugo Carreno-Luengo et al.

Summary: CYGNSS is a low-cost and high-science Earth Venture Mission selected by NASA in 2012, coordinated by the University of Michigan, aimed at estimating ocean surface wind speed over Tropical Cyclones using Earth-reflected GPS signals. The mission utilizes eight microsatellites to collect forward scattered signals along four specular directions simultaneously, allowing for sampling of the Earth's surface along 32 tracks over tropical latitudes.

REMOTE SENSING (2021)

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Article Meteorology & Atmospheric Sciences

Impact of CYGNSS-Derived Winds on Tropical Cyclone Forecasts in a Global and Regional Model

Michael J. Mueller et al.

Summary: The experimental study on CYGNSS wind data showed significant improvements in global model track forecasts within the first 60 hours, with slight degradations in V-max forecasts at certain lead times. Meanwhile, the regional model benefited greatly from CYGNSS data, showing substantial enhancements in track, V-max, and minimum sea level pressure forecasts.

MONTHLY WEATHER REVIEW (2021)

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Article Environmental Sciences

Tropical Cyclone Winds from WindSat, AMSR2, and SMAP: Comparison with the HWRF Model

Andrew Manaster et al.

Summary: A new dataset of tropical cyclone winds observed through rain by microwave radiometers has been developed, with comparisons made with a model. Resampling and temporal interpolation of model winds are necessary before comparisons due to differences in spatial scales. Overall results showed consistent storm features with low biases and standard deviations, with better agreement in the Atlantic basin. Impact of rain on satellite wind retrievals was discussed without systematic bias between sensors.

REMOTE SENSING (2021)

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Article Environmental Sciences

An Assessment of CyGNSS v3.0 Level 1 Observables over the Ocean

Matthew Lee Hammond et al.

Summary: Global Navigation Satellite System Reflectometry (GNSS-R) is an emerging Earth observation technology that utilizes signals reflected off the Earth's surface. CyGNSS, a constellation of satellites launched by NASA, has shown improved stability and inter-calibration in its latest v3.0 products, although significant geographical biases were found in the NBRCS data.

REMOTE SENSING (2021)

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Article Geosciences, Multidisciplinary

Wind Speed, Surface Flux, and Intraseasonal Convection Coupling From CYGNSS Data

Hien X. Bui et al.

GEOPHYSICAL RESEARCH LETTERS (2020)

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Article Engineering, Electrical & Electronic

Development of the CYGNSS Geophysical Model Function for Wind Speed

Christopher S. Ruf et al.

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (2019)

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Article Engineering, Electrical & Electronic

Assessment of CYGNSS Wind Speed Retrieval Uncertainty

Christopher S. Ruf et al.

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (2019)

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Article Engineering, Electrical & Electronic

An Assessment of CYGNSS Normalized Bistatic Radar Cross Section Calibration

Faozi Said et al.

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (2019)

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Article Engineering, Electrical & Electronic

The CYGNSS Level 1 Calibration Algorithm and Error Analysis Based on On-Orbit Measurements

Scott Gleason et al.

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (2019)

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Article Geosciences, Multidisciplinary

A Preliminary Impact Study of CYGNSS Ocean Surface Wind Speeds on Numerical Simulations of Hurricanes

Zhiqiang Cui et al.

GEOPHYSICAL RESEARCH LETTERS (2019)

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Article Engineering, Electrical & Electronic

Design and Performance of a GPS Constellation Power Monitor System for Improved CYGNSS L1B Calibration

Tianlin Wang et al.

IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (2019)

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Article Engineering, Ocean

Validation of High Ocean Surface Winds from Satellites Using Oil Platform Anemometers

Andrew Manaster et al.

JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY (2019)

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Article Environmental Sciences

Stepped Frequency Microwave Radiometer Wind-Speed Retrieval Improvements

Joseph W. Sapp et al.

REMOTE SENSING (2019)

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Article Oceanography

Copolarized and Cross-Polarized SAR Measurements for High-Resolution Description of Major Hurricane Wind Structures: Application to Irma Category5 Hurricane

Alexis Mouche et al.

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS (2019)

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Article Environmental Sciences

CYGNSS Surface Heat Flux Product Development

Juan A. Crespo et al.

REMOTE SENSING (2019)

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Article Oceanography

A Near-Real-Time Version of the Cross-Calibrated Multiplatform (CCMP) Ocean Surface Wind Velocity Data Set

Carl A. Mears et al.

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS (2019)

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Article Engineering, Ocean

Variational Analysis of Simulated Ocean Surface Winds from the Cyclone Global Navigation Satellite System (CYGNSS) and Evaluation Using a Regional OSSE

S. Mark Leidner et al.

JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY (2018)

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Article Multidisciplinary Sciences

A New Paradigm in Earth Environmental Monitoring with the CYGNSS Small Satellite Constellation

Christopher S. Ruf et al.

SCIENTIFIC REPORTS (2018)

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Article Meteorology & Atmospheric Sciences

Determining Tropical Cyclone Surface Wind Speed Structure and Intensity with the CYGNSS Satellite Constellation

Mary Morris et al.

JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY (2017)

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Article Meteorology & Atmospheric Sciences

New Ocean Winds Satellite Mission to Probe Hurricanes and Tropical Convection

Christopher S. Ruf et al.

BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY (2016)

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Article Geosciences, Multidisciplinary

Spaceborne GNSS reflectometry for ocean winds: First results from the UK TechDemoSat-1 mission

Giuseppe Foti et al.

GEOPHYSICAL RESEARCH LETTERS (2015)

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Article Meteorology & Atmospheric Sciences

A global wave parameter database for geophysical applications. Part 2: Model validation with improved source term parameterization

Nicolas Rascle et al.

OCEAN MODELLING (2013)

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Article Meteorology & Atmospheric Sciences

A CROSS-CALIBRATED MULTIPLATFORM OCEAN SURFACE WIND VELOCITY PRODUCT FOR METEOROLOGICAL AND OCEANOGRAPHIC APPLICATIONS

Robert Atlas et al.

BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY (2011)

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Article Geochemistry & Geophysics

Wind-Vector Retrievals Under Rain With Passive Satellite Microwave Radiometers

Thomas Meissner et al.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2009)

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Article Geochemistry & Geophysics

A nonlinear optimization algorithm for WindSat wind-vector retrievals

MH Bettenhausen et al.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2006)

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Article Geochemistry & Geophysics

Detection and processing of bistatically reflected GPS signals from low earth orbit for the purpose of ocean remote sensing

S Gleason et al.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2005)

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Article Geochemistry & Geophysics

The WindSat spaceborne polarimetric microwave radiometer: Sensor description and early orbit performance

PW Gaiser et al.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2004)

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Article Oceanography

Comparison of Special Sensor Microwave Imager and buoy-measured wind speeds from 1987 to 1997

CA Mears et al.

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS (2001)

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Article Geochemistry & Geophysics

Scattering of GPS signals from the ocean with wind remote sensing application

VU Zavorotny et al.

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (2000)

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Assessment of CYGNSS Wind Speed Retrievals in Tropical Cyclones

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