Suchergebnisse - "GNSS reflectometry (GNSS-R)"

Precise mapping of relative surface elevation using spaceborne GNSS-R phase altimetry with crossover adjustment: A case study of Lake Ladoga von Wang, Yang, Minear, J. Toby, Putnam, Alexa

“… This paper investigates a crossover adjustment method for spaceborne GNSS Reflectometry (GNSS-R) phase altimetry and demonstrates its capability for precise …”
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Measuring river slope using spaceborne GNSS reflectometry: Methodology and first performance assessment von Wang, Yang, Morton, Y. Jade, Minear, J. Toby, Putnam, Alexa, Conrad, Alex, Axelrad, Penina, Nerem, R. Steven, Warnock, April, Ruf, Christopher, Moreira, Daniel Medeiros, Talpe, Matthieu

“… River slope, a crucial parameter in hydrological modeling, has historically been difficult to measure continuously on a regional or global scale. Satellite …”
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Application of Neural Network to GNSS-R Wind Speed Retrieval von Liu, Yunxiang, Collett, Ian, Morton, Y. Jade

“… 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 …”
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Leveraging the CYGNSS Spaceborne GNSS‐R Observations to Detect Ionospheric Irregularities Over the Oceans: Method and Verification von Ren, Xiaodong, Liu, Hang, Mei, Dengkui, Yang, Pengxin, Zhang, Zhiyu, Freeshah, Mohamed, Zhang, Xiaohong

“… The Global Navigation Satellite System (GNSS) has significantly facilitated the detection of ionospheric irregularities. Nevertheless, the ground‐based GNSS …”
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Retrieving Atmospheric Water Vapor Content From Grazing Angle GNSS Reflectometry Measurements: Methodology and Performance Assessment von Roesler, Carolyn J., Morton, Y. Jade

“… This article presents integrated water vapor (IWV) retrieval using spaceborne grazing-angle GNSS reflectometry (GNSS-R) data collected over the equatorial …”
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Assessing the Relative Performance of GNSS-R Flood Extent Observations: Case Study in South Sudan von Downs, Brandi, Kettner, Albert J., Chapman, Bruce D., Brakenridge, G. Robert, O'Brien, Andrew J., Zuffada, Cinzia

“… Flooding is one of the deadliest and costliest natural disasters. Climate change-induced flooding events are increasing worldwide, disproportionately impacting …”
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Investigation of the Global Influence of Surface Roughness on Space‐Borne GNSS‐R Observations von Rahmani, Mina, Asgari, Jamal, Asgarimehr, Milad, Wickert, Jens

“… Accurately characterizing the impact of vegetation and roughness on CYGNSS observations, which are two main sources of disturbance, is essential for achieving …”
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Toward the Exploitation of HydroGNSS Coherent Channel: High Sampling Rate Products von Peng, Jilun, Cardellach, Estel, Li, Weiqiang, Ribo, Serni, Rius, Antonio

“… HydroGNSS is a European Space Agency (ESA) 2-satellite mission scheduled for launch in the second half of 2025, equipped to continuously operate …”
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Remote Sensing of Precipitation Using Reflected GNSS Signals: Response Analysis of Polarimetric Observations von Asgarimehr, Milad, Hoseini, Mostafa, Semmling, Maximilian, Ramatschi, Markus, Camps, Adriano, Nahavandchi, Hossein, Haas, Rudiger, Wickert, Jens

“… For the first time, rain effects on the polarimetric observations of the global navigation satellite system reflectometry (GNSS-R) are investigated. The …”
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Multiresolution soil moisture products based on a spatially adaptive estimation model and CYGNSS data von Jia, Yan, Zou, Jiaqi, Jin, Shuanggen, Yan, Qingyun, Chen, Yixiang, Jin, Yan, Savi, Patrizia

“… The estimation of soil moisture (SM) utilizing the data from the Cyclone Global Navigation Satellite System (CYGNSS) has attracted significant interest in …”
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SAVERS: A Simulator of GNSS Reflections From Bare and Vegetated Soils von Pierdicca, Nazzareno, Guerriero, Leila, Giusto, Roberto, Brogioni, Marco, Egido, Alejandro

“… The mean power of the reflected Global Navigation Satellite System (GNSS) signals acquired by a GNSS-Reflectometry (GNSS-R) receiver can be modeled through the …”
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Evaluation of the Land GNSS-Reflected DDM Coherence on Soil Moisture Estimation from CYGNSS Data von Dong, Zhounan, Jin, Shuanggen

“… With the development of spaceborne global navigation satellite system-reflectometry (GNSS-R), it can be used for terrestrial applications as a promising remote …”
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Improved GNSS-R Ocean Surface Altimetry With CYGNSS in the Seas of Indonesia von Mashburn, Jake, Axelrad, Penina, Zuffada, Cinzia, Loria, Eric, O'Brien, Andrew, Haines, Bruce

“… Ocean surface altimetry with GNSS reflectometry (GNSS-R) has the potential to improve the observation and retrieval of mesoscale ocean current flows by …”
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Detecting fire disturbances in forests by using GNSS reflectometry and machine learning: A case study in Angola von Santi, E., Clarizia, M.P., Comite, D., Dente, L., Guerriero, L., Pierdicca, N.

“… This paper aims at exploiting the potential of Global Navigation Satellite System Reflectometry (GNSS-R) for the detection of forest disturbances due to fires …”
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Development and Validation of Comprehensive Closed Formulas for Atmospheric Delay and Altimetry Correction in Ground-Based GNSS-R von Nikolaidou, Thalia, Santos, Marcelo C., Williams, Simon D. P., Geremia-Nievinski, Felipe

“… Radio wave propagation involved in global navigation satellite system reflectometry (GNSS-R) is subject to atmospheric refraction. Even for ground-based …”
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Lake Ice Surface Type Correlation With GNSS Surface Reflectivity von Datta-Barua, Seebany, Parvizi, Roohollah, Khan, Shahrukh, Baverel, Arthur, Johnson, Rosemary, Banwell, Alison F.

“… We present estimates and uncertainties using global navigation satellite system reflectometry (GNSS-R) of surface reflectivity (SR) at L-band for a set of …”
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Analysis and Mitigation of Radio Frequency Interference in Spaceborne GNSS Ocean Reflectometry Data von Huang, Feixiong, Yin, Cong, Xia, Junming, Wang, Xianyi, Sun, Yueqiang, Bai, Weihua, Qiu, Tongsheng, Du, Qifei, Yang, Guanglin, Zheng, Qi

“… With low signal power, Global Navigation Satellite System (GNSS) reflections in space are vulnerable to radio frequency interference (RFI) across the globe …”
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Combining ERA5 data and CYGNSS observations for the joint retrieval of global significant wave height of ocean swell and wind wave: a deep convolutional neural network approach von Bu, Jinwei, Yu, Kegen, Ni, Jun, Huang, Weimin

“… As an emerging remote sensing technology, GNSS reflectometry (GNSS-R) has been widely investigated for retrieving ocean parameters including ocean significant …”
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Arctic TEC Mapping Using Integrated LEO-Based GNSS-R and Ground-Based GNSS Observations: A Simulation Study von Liu, Lei, Morton, Y. Jade, Wang, Yang, Wu, Kahn-Bao

“… Ionospheric total electron content (TEC) maps with high spatial and temporal resolutions are essential for depicting the state of the ionosphere and for …”
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An Improved Method for Ionospheric TEC Estimation Using the Spaceborne GNSS-R Observations von Ren, Xiaodong, Liu, Hang, Zhang, Jincheng, Mei, Dengkui, Zhang, Xiaohong

“… Ionospheric monitoring and modeling have been difficult for a long time over the data-void or data-sparse oceans. As an emerging remote sensing technique, …”
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