Results 51 to 60 of about 1,078 (176)

Spontaneous zonal symmetry breaking of tropical rain belt

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Precipitable‐water snapshots show how a sea surface temperature (SST)‐forced tropical rain belt can remain zonally elongated or spontaneously reorganize into a localized convective cluster. The simulations identify the SST conditions favoring this zonal convective self‐aggregation and relate the transition to changes in boundary‐layer circulation and ...
Tomoro Yanase, Cathy Hohenegger
wiley   +1 more source

Regional/Single Station Zenith Tropospheric Delay Combination Prediction Model Based on Radial Basis Function Neural Network and Improved Long Short-Term Memory

Atmosphere, 2023
Atmospheric water vapor is an essential source of information that predicts global climate change, rainfall, and disaster-natured weather. It is also a vital source of error for Earth observation systems, such as the global navigation satellite system ...
Xu Yang, Yanmin Li, Xuexiang Yu, Hao Tan, Jiajia Yuan, Mingfei Zhu   +5 more
doaj   +1 more source

A Tunable Closed-Form Model for the Structure Function of Tropospheric Delay [PDF]

IEEE Geoscience and Remote Sensing Letters, 2008
Several interferometric synthetic aperture radar applications could benefit from the availability of a closed-form model for the second-order statistics of atmospheric delay. Due to the variability of the latter, it would also be desirable for the model to be tunable to some acquisition-specific information, describing the atmospheric state.
John P. Merryman Boncori, Johan J. Mohr
openaire   +1 more source

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner, Alef Comisso, Carlo Riva, Lorenzo Luini, Giuseppe Codispoti, Giorgia Parca   +5 more
wiley   +1 more source

Assessing the Accuracy of ECMWF Operational Atmospheric Forecasts with Tropospheric Delays from Ray Tracing

Applied Sciences
This study presents a comprehensive global accuracy assessment of the medium-range (up to 15 days) forecast pressure-level data generated by the physics-based Integrated Forecast System (IFS) and the newly operational, data-driven Artificial Intelligence
Özgür Özel, Kamil Teke
doaj   +1 more source

Geodetic VLBI Analysis at the National Geographic Institute of Spain

Proceedings, 2019
National Geographic Institute of Spain has a strong background concerning technical aspects of geodetic VLBI. As a step forward in this field, a VLBI analysis team has been set up and tests with different software packages have been carried out.
Víctor Puente, Esther Azcue, Susana Garcia-Espada, Yaiza Gómez-Espada   +3 more
doaj   +1 more source

Statistical description of tropospheric delay for InSAR: Overview and a new model [PDF]

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
This paper focuses on statistical modeling of water vapor fluctuations for InSAR. The structure function and power spectral density approaches are reviewed, summarizing their assumptions and results. The linking equations between these modeling techniques are reported.
John P. Merryman Boncori, Johan J. Mohr
openaire   +1 more source

Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model

Sensors, 2018
For GPS medium-long baseline real-time kinematic (RTK) positioning, the troposphere parameter is introduced along with coordinates, and the model is ill-conditioned due to its strong correlation with the height parameter.
Bao Shu, Hui Liu, Longwei Xu, Chuang Qian, Xiaopeng Gong, Xiangdong An   +5 more
doaj   +1 more source

Interplay Between Deep Convection and Mesoscale Gravity Waves

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 21, 16 November 2026.
Abstract Although the association between precipitation and mesoscale gravity waves (MGWs) is well documented, the feedback mechanisms governing their amplification remain difficult to isolate. This study uses convection‐permitting numerical simulations with 1–4 km grid spacing to investigate a complex MGW event that occurred over the south‐central ...
Ananya Sen, Michael L. Kaplan, Rajan Bhandari   +2 more
wiley   +1 more source

Shallow Cumulus Cloud Statistics in Real‐Case Large‐Eddy Simulations and Their Dependence on Soil Moisture

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 11, November 2026.
Abstract The ability of weather and climate models to reproduce the statistical properties of shallow cumulus clouds (SCCs) is critical for representing boundary‐layer transport, cloud cover, and cloud‐radiative effects. This study investigates statistical properties of SCC ensembles using the Icosahedral Nonhydrostatic model in large‐eddy simulation ...
Jaydeep Singh, Mirjana Sakradzija, Juerg Schmidli   +2 more
wiley   +1 more source