Results 21 to 30 of about 424 (165)
GNSS Radio Occultation in Advanced Numerical Weather Prediction Models
GEOmedia, 2019 GPS-Radio Occultation (GPS-RO), and generally, Global Navigation Satellite System Radio Occultation (GNSS-RO), is a technique that measures the refractivity of the Earth's atmosphere as a Low Earth Orbit (LEO) satellite listens to the radio signal of a ...
Guillermo Bosch
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GNSS-RO Deep Refraction Signals from Moist Marine Atmospheric Boundary Layer (MABL)
Atmosphere, 2022 The marine atmospheric boundary layer (MABL) has a profound impact on sensible heat and moisture exchanges between the surface and the free troposphere. The goal of this study is to develop an alternative technique for retrieving MABL-specific humidity (q) using GNSS-RO data in deep-refracted signals. The GNSS-RO signal amplitude (i.e., signal-to-noise
Dong L. Wu, Jie Gong, Manisha Ganeshan
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Quality assessment of YUNYAO radio occultation data in the neutral atmosphere [PDF]
Atmospheric Measurement TechniquesGlobal Navigation Satellite System (GNSS) radio occultation (RO) data are an important component of numerical weather prediction (NWP) systems. To incorporate more GNSS-RO data into NWP systems, commercial RO data have become an excellent option. Tianjin
X. Xu +9 more
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Atmospheric GNSS RO 1D-Var in Use at UCAR: Description and Validation
Remote Sensing, 2022 This paper describes, along with some validation results, the one-dimensional variational method (1D-Var) that is in use at the University Corporation for Atmospheric Research (UCAR) to retrieve atmospheric profiles of temperature, pressure, and humidity from the observation of the Global Navigation Satellite System (GNSS) radio occultation (RO).
Tae-Kwon Wee +4 more
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Effect of GNSS RO on prediction of the 2021 Henan Rainstorm
, 2022 Abstract Precise prediction of the extremely heavy rainstorm is still challenging due to less or low spatial-temporal measurements. Nowadays, space-borne Global Navigation Satellite System (GNSS) radio occultation (RO) provides high spatial-resolution atmospheric parameters, which may improve the prediction precision of heavy rainfalls. In this
Yu Wang, Shuanggen Jin
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Forecast Impact of FORMOSAT‐7/COSMIC‐2 GNSS Radio Occultation Measurements
Atmospheric Science Letters, 2021 The FORMOSAT‐7/COSMIC‐2 GNSS‐RO mission was launched on June 25, 2019, and it has provided a large increase in the number of GNSS‐RO observations available for operational numerical weather prediction (NWP) in the latitude band between ±40°. A key aim of
Benjamin Ruston, Sean Healy
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Atmosphere, 2023 The accurate determination of Atmospheric Boundary Layer Height (ABLH) is crucial in various atmospheric studies and practical applications. In this study, we present a comprehensive comparative analysis of five distinct methods for estimating ABLH using
Cong Qiu +7 more
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Evaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads
AUT Journal of Electrical Engineering, 2016 To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver. This receiver is usually located on low earth orbit satellite and receives GNSS satellites signal in the occultation ...
L. Mohammadi +2 more
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Meteorological Applications, 2022 Changes in the tropopause can explain regional and global weather and climate. In Tibet, there are few radiosonde stations, and the detection height is not high enough.
Guangwei Jiang +5 more
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Performance assessment of radio occultation data from GeoOptics by comparing with COSMIC data
Earth, Planets and Space, 2022 Responding to the ever-growing demand for environmental information, the National Oceanic and Atmospheric Administration (NOAA) seeks to enter into contracts to purchase Global Navigation Satellite System (GNSS) radio occultation (RO) observations ...
Hyeyeon Chang +4 more
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