Results 31 to 40 of about 392,818 (294)

Characterizing Rain Cells as Measured by a Ka-Band Nadir Radar Altimeter: First Results and Impact on Future Altimetry Missions

Remote Sensing, 2021
The impact of large atmospheric attenuation events on data quality and availability is a critical aspect for future altimetry missions based on Ka-band altimetry.
Bruno Picard, Nicolas Picot, Gérald Dibarboure, Nathalie Steunou   +3 more
doaj   +1 more source

Application of Synthetic Storm Technique for Diurnal and Seasonal Variation of Slant Path Ka-Band Rain Attenuation Time Series over a Subtropical Location in South Africa

International Journal of Antennas and Propagation, 2015
As technology advances and more demands are on satellite services, rain-induced attenuation still creates one of the most damaging effects of the atmosphere on the quality of radio communication signals, especially those operating above 10 GHz.
J. S. Ojo, P. A. Owolawi
doaj   +1 more source

Rain Attenuation at 58 GHz: Prediction versus Long-Term Trial Results

EURASIP Journal on Wireless Communications and Networking, 2007
Electromagnetic wave propagation research in frequency band 58 GHz was started at TESTCOM in Praha due to lack of experimentally obtained results needed for a realistic calculation of quality and availability of point-to-point fixed systems.
Vaclav Kvicera, Martin Grabner
doaj   +2 more sources

Rain Attenuation Study over an 18 GHz Terrestrial Microwave Link in South Korea

International Journal of Antennas and Propagation, 2019
Absorption of microwave radio frequency signal by atmospheric rain and losses is prevalent at frequencies above 5 GHz. The functioning frequencies of 18 GHz are taken for the point-to-point microwave link system.
Sujan Shrestha, Dong-You Choi
doaj   +1 more source

Millimeter Wave Attenuation Due to Wind and Heavy Rain in a Tropical Region

Sensors, 2023
Millimeter wave fixed wireless systems in future backhaul and access network applications can be affected by weather conditions. The losses caused by rain attenuation and antenna misalignment due to wind-induced vibrations have greater impacts on the ...
Ukrit Mankong, Pakawat Chamsuk, Sitthichok Nakprasert, Sangdaun Potha, Zu-Kai Weng, Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi   +7 more
doaj   +1 more source

Two approaches for effective modelling of rain-rate time-series for radiocommunication system simulations [PDF]

, 2006
The paper presents a model which allows to synthetically generate rain rate time-series for a fixed location. Rain rate time-series are very much correlated with signal attenuation in Ka band and above and, thus, enable to realistically simulate ...
Husson, Lionel, Fontán, Fernando Perez, Alasseur, Clémence, Mariño, P., Núñez, A., Fiebig, Uwe-Carsten   +5 more
core  

Regulated Ion‐Diffusion Hydrogels for Subtle and Multimodal Temperature‐Strain Sensing in Wound Monitoring

Advanced Functional Materials, EarlyView.
A soft, dual‐channel hydrogel patch enables simultaneous detection of wound temperature and strain by integrating ion‐diffusion‐mediated thermoelectric and resistive sensing. The conformal design maintains stable performance during motion, capturing subtle inflammatory and mechanical changes for continuous wound monitoring.
Yu Fang, Xinglong Pan, Zhiwei Li, Wanheng Lu, Chang Liu, Yi Zhou, Guo Tian, Ghim Wei Ho   +7 more
wiley   +1 more source

Learning-Assisted Rain Attenuation Prediction Models

Applied Sciences, 2020
Rain attenuation becomes significant to degrade the earth-space or terrestrial radio link’s signal-to-noise ratio (SNR). So, to maintain the desired SNR level, with the help of fade mitigation techniques (FMTs), it needs to control transmitted signals ...
Md Abdus Samad, Dong-You Choi
doaj   +1 more source

Prediction of Time Diversity Gain for Earth-to-Satellite Microwave Link Design Based on Real Time Rain Intensity Measurement

IEEE Access, 2023
The propagation impairments by rain strongly affect the earth-to-satellite links operating at frequencies higher than 18 GHz mainly due to the severe performance degradation of satellite communication system. The time diversity technique with appropriate
Md. Moktarul Alam, Md. Rafiqul Islam, Mohsen Koohestani, Elfatih A. A. Elsheikh   +3 more
doaj   +1 more source

Comparison of Precipitation Effects in Spaceborne X- and Ka-band SAR Imaging [PDF]

, 2009
As the operating frequencies of SAR-systems are increasing, the visible distortions due to precipitation in SAR-images are becoming more frequent. This holds especially for the case of convective rain events.
Chandra, Madhukar, Danklmayer, Andreas, M. Chandra, A. Danklmayer   +3 more
core   +1 more source