Results 101 to 110 of about 2,499 (207)

Forward operator for polarimetric radio occultation measurements [PDF]

open access: yesAtmospheric Measurement Techniques
Global Navigation Satellite System (GNSS) polarimetric radio occultation (PRO) observations sense the presence of hydrometeor particles along the ray path by measuring the difference of excess phases in horizontally and vertically polarised carrier waves.
D. Hotta, D. Hotta, K. Lonitz, S. Healy
doaj   +1 more source

GNSS troposphere tomography based on two-step reconstructions using GPS observations and COSMIC profiles [PDF]

open access: yes, 2013
Traditionally, balloon-based radiosonde soundings are used to study the spatial distribution of atmospheric water vapour. However, this approach cannot be frequently employed due to its high cost. In contrast, GPS tomography technique can obtain water
C. Cai, P. Xia, P. Xia, Z. Liu
core   +1 more source

AI‐Based Improvement of IRI‐2020 Electron Density Profiles With COSMIC Radio Occultation Data

open access: yesSpace Weather, Volume 24, Issue 2, February 2026.
Abstract In this study, we propose an AI‐based method to improve the electron density profiles generated by the International Reference Ionosphere (IRI)‐2020 model using the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation (RO) data.
Eun‐Young Ji   +5 more
wiley   +1 more source

The Real‐Time Advanced Ionospheric Data Assimilation (AIDA) Model

open access: yesSpace Weather, Volume 24, Issue 2, February 2026.
Abstract The Advanced Ionospheric Data Assimilation (AIDA) is a real‐time data assimilation model of global 3D ionosphere and plasmasphere electron density. Changes in the local space environment can occur on very short timescales, particularly during disturbed geomagnetic conditions.
Benjamin Reid   +5 more
wiley   +1 more source

Analysis of Ionospheric Disturbances Near 120°E in the Asia‐Pacific Sector During the May 2024 Superstorm Using Multi‐Instrument Observations

open access: yesSpace Weather, Volume 24, Issue 2, February 2026.
Abstract On 10 May 2024, a severe G5 geomagnetic storm—the most intense of solar cycle 25—significantly disturbed the global ionosphere. This study presents a comprehensive analysis using multi‐instrument observations, including ground‐based measurements from BDS‐GEO total electron content (TEC), digital ionosondes, and magnetometers; model outputs ...
Yue Sun   +4 more
wiley   +1 more source

Tomographic imaging of ionospheric plasma bubbles based on GNSS and radio occultation measurements [PDF]

open access: yes, 2018
Total electron content measurements given by the global navigation satellite system (GNSS) have successfully presented results to capture the signatures of equatorial plasma bubbles.
Camargo, Paulo de Oliveira   +3 more
core   +2 more sources

PRETTY: Grazing altimetry measurements based on the interferometric method [PDF]

open access: yes, 2017
The exploitation of signals stemming from global navigation systems for passive bistatic radar applications has beenproposed and implemented within numerous studies.
Beck, Peter   +7 more
core  

Assessment of Radiometer Calibration With GPS Radio Occultation for the MiRaTA CubeSat Mission [PDF]

open access: yes, 2016
The microwave radiometer technology acceleration (MiRaTA) is a 3U CubeSat mission sponsored by the NASA Earth Science Technology Office. The science payload on MiRaTA consists of a triband microwave radiometer and global positioning system (GPS) radio ...
Bardeen, J. R.   +9 more
core   +1 more source

Enhancing Job Scheduling of an Atmospheric Intensive Data Application [PDF]

open access: yes, 2012
Nowadays, e-Science applications involve great deal of data to have more accurate analysis. One of its application domains is the Radio Occultation which manages satellite data.
Caragnano, G.   +4 more
core  

The Impact of Inter-Modulation Components on Interferometric GNSS-Reflectometry [PDF]

open access: yes, 2016
The interferometric Global Navigation Satellite System Reflectometry (iGNSS-R) exploits the full spectrum of the transmitted GNSS signal to improve the ranging performance for sea surface height applications.
Cardellach, Estel   +6 more
core   +2 more sources

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