Results 21 to 30 of about 420 (173)

Analysis of the differences between GPS radio occultation and radiosonde atmosphere profiles in Egypt

Egyptian Journal of Remote Sensing and Space Sciences, 2022
Difference values between Global Positioning System (GPS)-Radio Occultation (RO) and radiosonde (RS) profiles are analyzed to assess the integration applicability between them in Egypt.
Ibrahim Fouad Ahmed, Mohamed Amin Abd El-Fatah, Ashraf El-Kutb Mousa, Gamal El-Fiky   +3 more
doaj   +1 more source

Experimental Validation of GNSS Interferometric Radio Occultation [PDF]

Remote Sensing, 2019
In this work, we present experimental results on the interferometric radio occultation (iRO) signal processing techniques, and compare the performance to the closed-loop and open-loop processing used in conventional radio occultation measurements. We also discuss the effects of antenna beam width to mitigate inter-satellite interferences, as well as ...
Serni Ribó, Weiqiang Li, Estel Cardellach, Fran Fabra, Ramon Padullés, Antonio Rius, Manuel Martín-Neira   +6 more
openaire   +1 more source

A comparison of FORMOSAT-3/COSMIC radio occultation and ionosonde measurements in sporadic E detection over mid- and low-latitude regions

Frontiers in Astronomy and Space Sciences, 2023
The investigation of sporadic E or Es layers typically relies on ground-based or satellite data. This study compares the Es layers recorded in ionograms with those detected using GNSS L1 signal-to-noise ratio data from FORMOSAT-3/COSMIC radio occultation
S. Sobhkhiz-Miandehi, S. Sobhkhiz-Miandehi, Y. Yamazaki, C. Arras, C. Arras, D. Themens, D. Themens   +6 more
doaj   +1 more source

Automatic GNSS Ionospheric Scintillation Detection with Radio Occultation Data Using Machine Learning Algorithm

Applied Sciences, 2023
Ionospheric scintillation often occurs in the polar and equator regions, and it can affect the signals of the Global Navigation Satellite System (GNSS).
Guangwang Ji, Ruimin Jin, Weimin Zhen, Huiyun Yang   +3 more
doaj   +1 more source

Simultaneous Radio Occultation Predictions for Inter-Satellite Comparison of Bending Angle Profiles from COSMIC-2 and GeoOptics

Remote Sensing, 2021
The Global Navigation Satellite System (GNSS) radio occultation (RO) is a remote sensing technique that uses International System of Units (SI) traceable GNSS signals for atmospheric limb soundings.
Yong Chen, Xi Shao, Changyong Cao, Shu-peng Ho   +3 more
doaj   +1 more source

Electron Density Retrieval From Truncated Radio Occultation GNSS Data [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractThis paper summarizes the definition and validation of two complementary new strategies, to invert incomplete Global Navigation Satellite System Radio‐Occultation (RO) ionospheric measurements, such as the ones to be provided by the future EUMETSAT Polar System Second Generation.
Haixia Lyu, Manuel Hernández‐Pajares, Enric Monte‐Moreno, Estel Cardellach   +3 more
openaire   +3 more sources

Polarimetric GNSS Radio-Occultations for heavy rain detection [PDF]

2010 IEEE International Geoscience and Remote Sensing Symposium, 2010
A Global Navigation Satellite System (GNSS) Radio-Occultation (RO) experiment is being accommodated in the Spanish Low Earth Orbiter (LEO) for Earth Observation PAZ. The RO-payload will provide globally distributed vertical thermodynamic profiles of the Atmosphere in Near Real-Time (NRT) suitable to be assimilated into Weather Numerical Prediction ...
Cardellach, Estel, Rius, Antonio, Cerezo, Fernando, García-Primo, Miguel Ángel, Torre Juárez, Manuel de la, Cucurull, Lidia, Ector, Dave   +6 more
openaire   +2 more sources

GNSS Radio Occultation Constellation Observing System Experiments

Monthly Weather Review, 2014
Abstract Observing system experiments within the operational ECMWF data assimilation framework have been performed for summer 2008 when the largest recorded number of Global Navigation Satellite System (GNSS) radio occultation observations from both operational and experimental satellites were available.
Bauer, Peter, Radnóti, G., Healy, Sean, Cardinali, Carla   +3 more
openaire   +1 more source

GEROS-ISS: GNSS REflectometry, Radio Occultation, and Scatterometry Onboard the International Space Station

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016
GEROS-ISS stands for GNSS REflectometry, radio occultation, and scatterometry onboard the International Space Station (ISS). It is a scientific experiment, successfully proposed to the European Space Agency in 2011.
Jens Wickert, Estel Cardellach, Manuel Martin-Neira, Jorge Bandeiras, Laurent Bertino, Ole Baltazar Andersen, Adriano Camps, Nuno Catarino, Bertrand Chapron, Fran Fabra, Nicolas Floury, Giuseppe Foti, Christine Gommenginger, Jason Hatton, Per Hoeg, Adrian Jaggi, Michael Kern, Tong Lee, Zhijin Li, Hyuk Park, Nazzareno Pierdicca, Gerhard Ressler, Antonio Rius, Josep Rosello, Jan Saynisch, Francois Soulat, C. K. Shum, Maximilian Semmling, Ana Sousa, Jiping Xie, Cinzia Zuffada   +30 more
doaj   +1 more source

Analysis of reflections in GNSS radio occultation measurements using the phase matching amplitude [PDF]

Atmospheric Measurement Techniques, 2018
It is well-known that in the presence of super-refractive layers in the lower-tropospheric inversion of GNSS radio occultation (RO) measurements using the Abel transform yields biased refractivity profiles. As such it is problematic to reconstruct the
T. Sievert, J. Rasch, A. Carlström, M. I. Pettersson   +3 more
doaj   +1 more source