Results 51 to 60 of about 420 (173)

GNSS radio occultation profiles in the neutral atmosphere from inversion of excess phase data

Terrestrial, Atmospheric and Oceanic Sciences, 2019
Long-term stability, global coverage and high resolution are characteristics that make the Global Navigation Satellite System (GNSS) radio occultation (RO) technique well-suitable to serve as anchor measurements for observing the Earth’s atmosphere.
Paweł Hordyniec, Cheng-Yung Huang, Chian-Yi Liu, Witold Rohm, Shu-Ya Chen   +4 more
doaj   +1 more source

Algorithm Theoretical Basis for Version 3 TEMPO Level 0–1 Processor

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract The Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument is the first spaceborne hyperspectral spectrometer that measures backscattered sunlight over North America in a geostationary orbit. The two charge‐coupled device (CCD) detectors of TEMPO, with spectral coverages of 293–494 and 538–741 nm and resolutions of 0.53–0.63 nm ...
Heesung Chong, Xiong Liu, John Houck, David E. Flittner, James Carr, Weizhen Hou, John E. Davis, Raid M. Suleiman, Kelly Chance, Nischal Mishra, Christopher Chan Miller, Gonzalo González Abad, Brian Baker, James Lasnik, Dennis Nicks, Juseon Bak, Caroline R. Nowlan, Huiqun Wang, Junsung Park, Jean Fitzmaurice, Laurel Carpenter   +20 more
wiley   +1 more source

An evaluation of GNSS radio occultation atmospheric profiles from Sentinel-6

Egyptian Journal of Remote Sensing and Space Sciences, 2023
The Global Navigation Satellite System (GNSS) radio occultation (RO) significantly impacts climate change monitoring. GNSS RO is based mainly on the refraction of the GNSS signals transmitted by satellites and received by a receiver on a Low Earth Orbit (
Mohamed Zhran
doaj   +1 more source

The Ionospheric Lunar Tidal Response to the 2020–2021 Sudden Stratospheric Warming Observed by COSMIC‐2, ICON and Modeled by SD‐WACCMX, TIE‐GCM

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract This study examines how the breakdown of the stratospheric polar vortex influences lunar semidiurnal (M2) tides in F‐region electron density using Global Ionospheric Specification (GIS) data from the Constellation Observing System for Meteorology, Ionosphere, and Climate‐2 (COSMIC‐2).
Deepali Aggarwal, Sunil Kumar, B. C. Martinez, Nicholas Pedatella, Xian Lu, Jens Oberheide   +5 more
wiley   +1 more source

Planetary boundary layer height retrieval using GNSS Radio Occultation over Egypt

Egyptian Journal of Remote Sensing and Space Sciences, 2022
Global Navigation Satellite System (GNSS) Radio Occultation (RO) is an excellent remote sensing technique for sounding the atmosphere. GNSS satellites send signals through the atmosphere of the Earth, and a GNSS receiver mounted on a Low Earth Orbit (LEO)
Mohamed Zhran, Ashraf Mousa
doaj   +1 more source

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

Space 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, Yong‐Jae Moon, Young‐Sil Kwak, Kangwoo Yi, Jeong‐Heon Kim, Woong Jeon   +5 more
wiley   +1 more source

The FengYun-3C radio occultation sounder GNOS: a review of the mission and its early results and science applications [PDF]

Atmospheric Measurement Techniques, 2018
The Global Navigation Satellite System (GNSS) Occultation Sounder (GNOS) is one of the new-generation payloads on board the Chinese FengYun 3 (FY-3) series of operational meteorological satellites for sounding the Earth's neutral atmosphere and ...
Y. Sun, Y. Sun, Y. Sun, W. Bai, W. Bai, W. Bai, C. Liu, C. Liu, Y. Liu, Q. Du, Q. Du, Q. Du, X. Wang, X. Wang, G. Yang, M. Liao, Z. Yang, X. Zhang, X. Meng, X. Meng, D. Zhao, D. Zhao, J. Xia, J. Xia, Y. Cai, Y. Cai, G. Kirchengast, G. Kirchengast, G. Kirchengast   +28 more
doaj   +1 more source

Estimation of dusk time F-region electron density vertical profiles using LSTM neural networks: A preliminary investigation

Artificial Intelligence in Geosciences, 2023
The vertical profile of the ionosphere density plays a significant role in the development of low-latitude Equatorial Plasma Bubbles (EPBs), that in turn lead to ionospheric scintillation which can severely degrade precision and availability of critical ...
Lucas Alves Salles, Paulo Renato Pereira Silva, Guilherme Schwinn Fagundes, Jonas Sousasantos, Alison Moraes   +4 more
doaj   +1 more source

Assessment of GNSS radio occultation refractivity under heavy precipitation [PDF]

, 2018
Abstract. A positive bias at heights between 3 and 8 km has been observed when comparing the radio occultation retrieved refractivity with that of meteorological analyses and re-analyses, in cases where heavy precipitation is present. The effect of precipitation in RO retrievals has been investigated as a potential cause of the bias, using ...
Ramon Padullés, Estel Cardellach, Kuo-Nung Wang, Chi O. Ao, F. Joseph Turk, Manuel de la Torre-Juárez   +5 more
openaire   +1 more source

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

Space 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, David R. Themens, Sean Elvidge, Mohammad Afraz Ahmed, Warrick Ball, M. Mainul Hoque   +5 more
wiley   +1 more source