Results 21 to 30 of about 7,524 (217)
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 +1 more source
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 +3 more
doaj +1 more source
Geophysical Research Letters, 2023 This study assesses the potential influence of global navigation satellite system (GNSS) radio occultation (RO) data assimilation on the forecast skill of tropical cyclone formation over the western North Pacific in September–October 2019 through a ...
Hsu‐Feng Teng +2 more
doaj +1 more source
Stability of CubeSat Clocks and Their Impacts on GNSS Radio Occultation
Remote Sensing, 2022 Global Navigation Satellite Systems’ radio occultation (GNSS-RO) provides the upper troposphere-lower stratosphere (UTLS) vertical atmospheric profiles that are complementing radiosonde and reanalysis data. Such data are employed in the numerical weather
Amir Allahvirdi-Zadeh +4 more
doaj +1 more source
Natural Hazards and Earth System Sciences, 2023 Abstract. Ionospheric disturbances induced by seismic activity have been studied in recent years by many authors, showing an impact both before and after the occurrence of earthquakes. In this study, the ionospheric scintillation produced by the 2021 La Palma volcano eruption is analyzed.
C. Molina +7 more
openaire +5 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 +1 more source
Statistically analyzing the effect of ionospheric irregularity on GNSS radio occultation atmospheric measurement [PDF]
Atmospheric Measurement Techniques, 2021 The Global Navigation Satellite System (GNSS) atmospheric radio occultation (RO) has been an effective method for exploring Earth's atmosphere. RO signals propagate through the ionosphere before reaching the neutral atmosphere.
M. Li +7 more
doaj +1 more source
Improved models for estimating sporadic-E intensity from GNSS radio occultation measurements
Frontiers in Astronomy and Space Sciences, 2023 Several models for estimating sporadic-E intensity from Global Navigation Satellite System (GNSS) radio occultation (RO) observation have previously been developed using a single perturbation or intensity parameter, such as phase-based total electron ...
Daniel J. Emmons +7 more
doaj +1 more source
GNSS radio occultation soundings from commercial off-the-shelf receivers on board balloon platforms [PDF]
Atmospheric Measurement Techniques, 2023 The Global Navigation Satellite System (GNSS) radio occultation (RO) technique has proven to be an effective tool for Earth atmosphere profiling. Traditional spaceborne RO satellite constellations are expensive with relatively low sampling density for ...
K. J. Nelson +8 more
doaj +1 more source
Rádio Ocultação GNSS: Revisão Teórica, Missões e Produtos
Revista Brasileira de Cartografia, 2022 A rádio ocultação (RO) começou a ser utilizada para a sondagem da atmosfera de outros planetas a partir da década de 1960. Com o desenvolvimento do Global Navigation Satellite System (GNSS) e de missões com satélites de baixa órbita (Low Earth Orbit ...
Gabriel Oliveira Jerez +4 more
doaj +1 more source