Results 31 to 40 of about 510 (175)

Tropospheric Refractivity Profile Estimation by GNSS Measurement at China Big-Triangle Points

Atmosphere, 2021
Atmospheric radio refractivity has an obvious influence on the signal transmission path and communication group delay effect. The uncertainty of water vapor distribution is the main reason for the large error of tropospheric refractive index modeling ...
Xiang Dong, Fang Sun, Qinglin Zhu, Leke Lin, Zhenwei Zhao, Chen Zhou   +5 more
doaj   +1 more source

A Comprehensive Evaluation of Key Tropospheric Parameters from ERA5 and MERRA-2 Reanalysis Products Using Radiosonde Data and GNSS Measurements

Remote Sensing, 2021
Tropospheric delay is a major error source in the Global Navigation Satellite System (GNSS), and the weighted mean temperature (Tm) is a key parameter in precipitable water vapor (PWV) retrieval. Although reanalysis products like the National Centers for
Lijie Guo, Liangke Huang, Junyu Li, Lilong Liu, Ling Huang, Bolin Fu, Shaofeng Xie, Hongchang He, Chao Ren   +8 more
doaj   +1 more source

Anomalous Zenith Total Delays for an Insular Tropical Location: The Tahiti Island Case

Remote Sensing, 2022
The weighted mean temperature of the troposphere, Tm, is a key parameter in GNSS meteorology. It can be routinely derived based on meteorological data from radiosonde (RS) or numerical weather models. Alternatively, it can be also derived through a least-
Fangzhao Zhang, Peng Feng, Guochang Xu, Jean-Pierre Barriot   +3 more
doaj   +1 more source

Kinematic GNSS Estimation of Zenith Wet Delay over a Range of Altitudes

Journal of Atmospheric and Oceanic Technology, 2016
AbstractAtmospheric water vapor estimates from static ground-based Global Navigation Satellite System (GNSS) receivers are now operationally assimilated into numerical weather prediction models, either as total precipitable water vapor (PWV) or zenith total delay.
Webb SR, Penna NT, Clarke PJ, Webster S, Martin I, Bennitt GV   +5 more
openaire   +2 more sources

Intercropping mitigates incidence of the oilseed rape insect pest complex

Pest Management Science, EarlyView.
Intercropping reduces the incidence of the oilseed rape insect pest complex with a significant impact of the direct visual and physical disruption provided by the companion plant. Abstract BACKGROUND Oilseed rape (OSR, Brassica napus) is a major crop requiring numerous phytosanitary treatments.
Laurie Magnin, Ivan Hiltpold, Alexandra Jullien, Alice Baux   +3 more
wiley   +1 more source

Major Melting Event on the Ross Ice Shelf, Antarctica, Connected With Enhanced Atmospheric Turbulence

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract The Ross Ice Shelf (RIS) in West Antarctica experienced extensive surface melting in January 2016, driven by warm humid air transported from over the Southern Ocean. Few studies have reported increased atmospheric water vapor and turbulent mixing during this event in this region, where the availability of surface measurements is challenging ...
Dhiman R. Mondal, Pedro Elosegui, Nathra Ramrajvel, Scott Paine   +3 more
wiley   +1 more source

GNSS Data Processing and Validation of the Altimeter Zenith Wet Delay around the Wanshan Calibration Site

Remote Sensing, 2022
The Wanshan calibration site (WSCS) is the first in-situ field for calibration and validation (Cal/Val) of HY-2 satellite series in China. It was built in December, 2018 and began business operation in 2020.
Wanlin Zhai, Jianhua Zhu, Mingsen Lin, Chaofei Ma, Chuntao Chen, Xiaoqi Huang, Yufei Zhang, Wu Zhou, He Wang, Longhao Yan   +9 more
doaj   +1 more source

Attributing Long‐Term Trends in Marine Low Cloud Morphologies to Aerosols and Large‐Scale Meteorology With Deep Learning

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The response of marine low‐cloud mesoscale morphologies to climate change and emission reductions remains poorly understood. Here, we link long‐term trends in six cloud morphologies to variations in large‐scale meteorology and aerosols. The trends show strong spatial heterogeneity, with closed and disorganized mesoscale cellular convection ...
Jihu Liu, Yang Cao, Yuanyuan Wu, Yannian Zhu, Daniel Rosenfeld, Yu Zhang, Kang‐En Huang, Minghuai Wang   +7 more
wiley   +1 more source

Empirical model for mean temperature and assessment of precipitable water vapor derived from GPS

Geodesy and Geodynamics, 2013
The estimation of Precipitable Water Vapor (PWV) derived from Global Positioning System (GPS) data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data (No.57494) in Wuhan.
Tang Yanxin, Liu Lilong, Yao Chaolong
doaj   +1 more source

Prediction of zenith wet delays using artificial neural networks for precise point positioning

, 2023
Permanent GNSS stations provide invaluable observations to estimate the zenith tropospheric delays in near realtime. However, the prediction of zenith wet delays is still a challenge due to the high spatial and temporal variation of atmospheric water vapour. Recently a near realtime GNSS data processing system has been set up at the Budapest University
Laky, P., Acs, A., Rozsa, S.
openaire   +2 more sources