Results 221 to 230 of about 3,734 (258)

The effect of wind speed on SST retrieval

2009 IEEE Aerospace conference, 2009
Many studies have been performed to retrieve the sea surface temperature (SST). However, the researchers studied only the effect of brightness temperature difference, observation angle and water vapor content. The sea surface emissivity (SSE) is normally considered as unity or constant.
H.G. Ng, M.Z. MatJafri, K. Abdullah, C.J. Wong   +3 more
openaire   +1 more source

Wind Speed Extraction Based on High Frequency Radar Retrieved Wind-Driven Current

IEEE Geoscience and Remote Sensing Letters, 2021
High frequency (HF) radar often indirectly inverts wind field from wave height field, so the accuracy, range, and spatial resolution of the estimated wind field are usually limited by the wave field estimation performance. However, the sea surface current including the wind-driven current can often be accurately measured by radar.
Cui Wen, Yingwei Tian, Biyang Wen
openaire   +1 more source

Application of Neural Network to GNSS-R Wind Speed Retrieval

IEEE Transactions on Geoscience and Remote Sensing, 2019
This paper applies a machine learning (ML) algorithm based on the multi-hidden layer neural network (MHL-NN) for ocean surface wind speed estimation using global navigation satellite system (GNSS) reflection measurements. Unlike conventional wind speed retrieval methods that often depend on limited scalar delay-Doppler map (DDM) observables, the ...
Yu Morton, Yunxiang Liu, Ian Collett
exaly   +3 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

Operational scatterometry: high wind speed retrievals

IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2002
Near real-time ocean surface wind vector retrievals from the SeaWinds scatterometer on QuikSCAT promise to greatly improve upon the ocean surface information currently available to operational marine forecasting. The impressive 1800 km-wide swath coverage and 25 km resolution of SeaWinds wind vector retrievals are a vast improvement over currently ...
P.S. Chang, L.N. Connor, J.R. Carswell, R.S. Dunbar   +3 more
openaire   +1 more source

Limitations of scatterometry high wind speed retrieval

IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2002
Over the last year, the University of Massachusetts (UMass) Microwave Remote Sensing Laboratory (MIRSL) has worked with the National Oceanic and Atmospheric Administration (NOAA) Office of Research Applications (ORA) and Hurricane Research Division (HRD) to better characterize the Ku and C band ocean backscatter response to high wind speeds (greater ...
J.R. Carswell, E.J. Knapp, P.S. Chang, P.D. Black, F.D. Marks   +4 more
openaire   +1 more source

WindSat retrieval of ocean surface wind speeds in tropical cyclones

2010 IEEE International Geoscience and Remote Sensing Symposium, 2010
The WindSat polarimetric microwave radiometer measures top-of-atmosphere brightness temperature, useful for retrieving surface wind vector over the ocean. This procedure was previously documented in low to moderate wind and light precipitation [1,2]. An atmospheric clearing algorithm designed to remove the emissive and absorptive effects of stronger ...
Amanda Mims, Rachael Kroodsma, Christopher Ruf, Darren McKague   +3 more
openaire   +1 more source

Calibration and validation processing for the CYGNSS wind speed retrieval algorithm

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
The processing procedures used for the calibration and validation of Level 2 ocean surface wind speed data product for the CYGNSS mission will be presented in this work. The validation process is planned against a series of ground truth matchups which include buoy measurements, other existing satellite counterparts such as scatterometers, radiometers ...
Rajeswari Balasubramaniam, Christopher S. Ruf, Darren McKague, Maria Paola Clarizia, Scott Gleason 0001   +4 more
openaire   +2 more sources

An Algorithm for Wind Speed Retrieval from CYGNSS Space Observatories

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Recent studies have demonstrated that Global Navigation Satellite System-Reflectometry (GNSS-R) can be used for global wind-speed measurements over the ocean. Delay-Doppler Maps (DDM) are produced continuously by CYGNSS observatories are currently used for wind speed retrievals either directly or after calculation of global observables.
Pia Addabbo, Maurizio di Bisceglie, Carmela Galdi, Generoso Giangregorio   +3 more
openaire   +2 more sources

A new wind retrieval algorithm for Jason-1 at high wind speeds

International Journal of Remote Sensing, 2011
The altimeter wind speed algorithm at high wind speeds remains unsolved because of lack of observed data. In this study data at high wind speeds were generated using Yin's typhoon model, which consists of the Rankine vortex model and the angular momentum model with typhoon parameters, provided by the Joint Typhoon Warning Centre (JTWC). The accuracy of
Yanzhen Gu, Yuguang Liu, Qing Xu, Yahao Liu, Xueyuan Liu, Yujuan Ma   +5 more
openaire   +1 more source