Results 11 to 20 of about 2,499 (207)
Seeking Optimal GNSS Radio Occultation Constellations Using Evolutionary Algorithms [PDF]
Remote Sensing, 2019 Given the great achievements of the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission in providing huge amount of GPS radio occultation (RO) data for weather forecasting, climate research, and ionosphere monitoring,
Xiaohua Xu +4 more
doaj +5 more sources
Electron density retrieval from truncated Radio Occultation GNSS data [PDF]
Journal of Geophysical Research: Space Physics, 2019 This 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
Cardellach Galí, Estel +3 more
core +4 more sources
Real-Time Tomographic Inversion of Truncated Ionospheric GNSS Radio Occultations
Remote Sensing, 2023 This paper presents a new way of combining Abel inversion and the Chapman model with a linearly increasing scale height to retrieve ionospheric electron density vertical profiles from truncated-sounding radio-occultation data. A linear Vary–Chap model is
Germán Olivares-Pulido +9 more
doaj +4 more sources
Monitoring global climate change using GNSS radio occultation [PDF]
npj Climate and Atmospheric Science, 2022 The emerging signal of climate change is now clearly evident in Global Navigation Satellite System (GNSS) radio occultation (RO) data, matching predictions made by climate models 15 years ago. The observed RO trends represent well-understood responses to
Hans Gleisner +2 more
doaj +2 more sources
Assimilation of GNSS radio occultation observations in GRAPES [PDF]
Atmospheric Measurement Techniques, 2014 This paper reviews the development of the global navigation satellite system (GNSS) radio occultation (RO) observations assimilation in the Global/Regional Assimilation and PrEdiction System (GRAPES) of China Meteorological Administration, including ...
Y. Liu, Y. Liu, J. Xue
doaj +3 more sources
Global tropopause height determination using GNSS radio occultation
Egyptian Journal of Remote Sensing and Space Sciences, 2023 The tropopause layer is a crucial stratum of the earth's atmosphere that attracts more interest from climate and atmospheric researchers. The observables of the global navigation satellite system (GNSS) allow for continuous and long-term research of the ...
Mohamed Zhran, Ashraf Mousa
doaj +2 more sources
Ionospheric bending correction for GNSS radio occultation signals [PDF]
Radio Science, 2011 Ionospheric propagation effects on Global Navigation Satellite Systems (GNSS) signals are the most pronounced during radio occultation due to long ionospheric travel paths of the received signal on low Earth orbiting satellites. Inhomogeneous plasma distribution and anisotropy cause higher‐order nonlinear refraction effects on GNSS signals which cannot
Hoque, Mohammed Mainul +1 more
openaire +4 more sources
Remote Sensing, 2023 High-frequency skywave propagation can be heavily impacted by D- and E-region dynamics requiring accurate global measurements to optimize performance. A standard measurement technique is to use ionosondes, but they are unable to measure below 1 MHz and ...
Dylan J. Shaver +5 more
doaj +3 more sources
A simplified approach for generating GNSS radio occultation refractivity climatologies [PDF]
Atmospheric Measurement Techniques, 2013 The possibility of simplifying the retrieval scheme required to produce GNSS radio occultation refractivity climatologies is investigated. In a new, simplified retrieval approach, the main statistical analysis is performed in bending angle space and an ...
H. Gleisner, S. B. Healy
doaj +4 more sources
Assessment of Commercial GNSS Radio Occultation Performance from PlanetiQ Mission
Remote SensingGlobal Navigation Satellite System (GNSS) radio occultation (RO) provides valuable 3-D atmospheric profiles with all-weather, all the time and high accuracy. However, GNSS RO mission data are still limited for global coverage.
Mohamed Zhran +4 more
doaj +3 more sources