Results 21 to 30 of about 424 (165)

GNSS-RO Refractivity Bias Correction Under Ducting Layer Using Surface-Reflection Signal [PDF]

Remote Sensing, 2020
Due to its high vertical resolution and cloud-penetrating capability, GNSS-Radio Occultation (RO) remote sensing technique has been utilized to observe the vertical structure of the Planetary Boundary Layer (PBL) in recent years. However, the critical refraction, or ducting, caused by large refractivity gradients usually associated with the top of the ...
Wang, Kuo-Nung, Ao, Chi O., Juárez, Manuel de la Torre   +2 more
openaire   +2 more sources

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
doaj   +3 more sources

Quality assessment of YUNYAO radio occultation data in the neutral atmosphere [PDF]

Atmospheric Measurement Techniques
Global 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, W. Han, W. Han, J. Wang, Z. Gao, Z. Gao, F. Li, Y. Cheng, N. Fu, N. Fu   +9 more
doaj   +1 more source

Applications of GNSS-RO to Numerical Weather Prediction and Tropical Cyclone Forecast [PDF]

Atmosphere, 2020
The global navigation satellite system (GNSS) radio occultation (RO) technique is an atmospheric sounding technique that originated in the 1990s. The data provided by this approach are playing a consistently significant role in atmospheric research and related applications.
Weihua Bai, Nan Deng, Yueqiang Sun, Qifei Du, Junming Xia, Xianyi Wang, Xiangguang Meng, Danyang Zhao, Congliang Liu, Guangyuan Tan, Ziyan Liu, Xiaoxu Liu   +11 more
openaire   +2 more sources

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
doaj   +1 more source

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
openaire   +2 more sources

A Comparison of Atmospheric Boundary Layer Height Determination Methods Using GNSS Radio Occultation Data

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, Xiaoming Wang, Haobo Li, Kai Zhou, Jinglei Zhang, Zhe Li, Dingyi Liu, Hong Yuan   +7 more
doaj   +1 more source

Tropical tropopause in Tibet: Insights from ground‐based global navigation satellite system and space‐based radio occultation observations

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, Yingying Shan, Chunxi Guo, Hong Zhao, Bin Wang, Dajiang Zhao   +5 more
doaj   +1 more source

Ionospheric S4 Scintillations from GNSS Radio Occultation (RO) at Slant Path [PDF]

Remote Sensing, 2020
Ionospheric scintillation can significantly degrade the performance and the usability of space-based communication and navigation signals. Characterization and prediction of ionospheric scintillation can be made from the Global Navigation Satellite System (GNSS) radio occultation (RO) technique using the measurement from a deep slant path where the RO ...
openaire   +2 more sources

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, Richard A. Anthes, Douglas C. Hunt, William S. Schreiner, Ying-Hwa Kuo   +4 more
openaire   +2 more sources