Results 81 to 90 of about 5,434 (212)

Tropospheric Propagation Effects Extracted From ADS‐B Messages

Engineering Reports, Volume 7, Issue 12, December 2025.
This study explores the use of ADS‐B messages to estimate tropospheric effects, effectively isolating atmospheric influences from interference. The approach enables independent lower atmosphere studies and offers a cost‐free supplementary method for satellite applications, benefiting GNSS systems, especially at low elevation angles where multipath and ...
Alina‐Mihaela Badescu
wiley   +1 more source

Interannual Rainfall Variability in West Africa: Reconstruction Based on Atmospheric Circulation Patterns

International Journal of Climatology, Volume 45, Issue 14, 30 November 2025.
This study provides a statistical tool for the reconstruction of annual rainfall anomalies based on atmospheric circulation patterns in the data‐scarce region of West Africa. ABSTRACT The West African Monsoon, known for its significant rainfall variability, led to the Sahel drought from 1968 to the 1990s, followed by a recovery in rainfall since the ...
Manuel Rauch, Jan Bliefernicht, Marlon Maranan, Andreas H. Fink, Harald Kunstmann   +4 more
wiley   +1 more source

Effect of GPS tropospheric delay Neill mapping function simplification [PDF]

, 2009
The mathematical modeling on the mapping function models should be revised and also simplified to improve the calculation of the GPS tropospheric delay.
Abu Bakar, Mohd Rizam, Matori, Abd. Nasir, Md Noorani, Mohd Salmi, Mohamed Shariff, Abdul Rashid, Mohamed, Azhari, Sakidin, Hamzah   +5 more
core  

A Precise Distance to IRAS 00420+5530 via H2O Maser Parallax with the VLBA

, 2009
We have used the VLBA to measure the annual parallax of the H2O masers in the star-forming region IRAS 00420+5530. This measurement yields a direct distance estimate of 2.17 +/- 0.05 kpc (
Brand, Brand, Brisken, Chatterjee, G. A. Moellenbrock, Hachisuka, Kerr, M. J. Claussen, Ma, Molinari, Molinari, Neckel, Reid, Reid, Reid, Sato, Shepherd, van Langevelde, W. M. Goss, Zhang   +19 more
core   +2 more sources

PEXO : a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities [PDF]

, 2019
54 pages, 2 tables, 19 figures, accepted for publication in ApJS, PEXO is available at https://github.com/phillippro/pexoThe ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new
Alan P. Boss, Arzoumanian Z., Auer L. H., Beichman C., Catanzarite J., Catanzarite J. H., Damour T., Eastman J., Eastman J., ESA (ed), Event Horizon Telescope Collaboration, Fabian A. C., Fabo Feng, Feng F., Folkner W. M., Folkner W. M., Folkner W. M., Fomalont E. B., Fomalont E. B., Gubler J., Guillem Anglada-Escudé, Hohenkerk C., Holczer T., Hugh R. A. Jones, Irwin A. W., Johns-Krull C. M., Jordán A., Kjeldsen H., Klioner S. A., Klioner S. A., Kopeikin S. M., Kopeikin S. M., Kopeikin S. M., Lelli F., Maksym Lisogorskyi, Mamajek E. E., Mangum J. G., McCarthy D. D., Mignard F., Miralda-Escudé J., Misner C. W., Moe M., Murray C. D., Perryman M., Petit G., Petit G. ed Finkelstein A., Plavchan P., Pourbaix D., Psaltis D. ed Kaaret P., R. Paul Butler, Rüeger J., Sana H., Sergei M. Kopeikin, Standish E., Standish E. M., Thiele T. N., Unwin S. C., Viswanathan V., Weisberg J. M., Wex N., Winn J. N., Wright J. T., Zhao L.   +62 more
core   +3 more sources

Retrieval of Real-Time Zenith Tropospheric Delay with Beidou PPP-B2b

, 2023
The traditional method for retrieving the real-time zenith total delay (ZTD) with GNSS requires stable access to the internet for the reception of satellite orbit and clock corrections. This limits the use of this technique in areas without a reliable internet connection. The new precise point positioning service via the B2b signal (PPP-B2b) service on
Wang, X., Zhang, J., Zhou, K.
openaire   +2 more sources

Cosmic Ray Counting Variability From Water‐Cherenkov Detectors as a Proxy of Stratospheric Conditions in Antarctica

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract This work examines atmospheric effects on cosmic ray counts observed by a Water‐Cherenkov detector at the Argentine Antarctic Marambio Station. We analyze the influence of ground‐level barometric pressure and geopotential height at various pressure levels on daily particle rates, finding the strongest association at 100 hPa, linked to ...
N. A. Santos, N. Gómez, S. Dasso, A. M. Gulisano, L. Rubinstein, M. Pereira, O. Areso, for the LAGO Collaboration   +7 more
wiley   +1 more source

The effect of the dynamic wet troposphere on VLBI measurements [PDF]

Calculations using a statistical model of water vapor fluctuations yield the effect of the dynamic wet troposphere on Very Long Baseline Interferometry (VLBI) measurements.
Lanyi, G. E., Treuhaft, R. N.
core   +1 more source

RCEMIP‐ACI: Aerosol‐Cloud Interactions in a Multimodel Ensemble of Radiative‐Convective Equilibrium Simulations

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 11, November 2025.
Abstract Aerosol‐cloud interactions are a persistent source of uncertainty in climate research. This study presents findings from a model intercomparison project examining the impact of aerosols on clouds and climate in convection‐permitting radiative‐convective equilibrium (RCE) simulations.
Guy Dagan, Susan C. van den Heever, Philip Stier, Tristan H. Abbott, Christian Barthlott, Jean‐Pierre Chaboureau, Jiwen Fan, Stephan de Roode, Blaž Gasparini, Corinna Hoose, Fredrik Jansson, Gayatri Kulkarni, Gabrielle R. Leung, Suf Lorian, Thara Prabhakaran, David M. Romps, Denis Shum, Mirjam Tijhuis, Chiel C. van Heerwaarden, Allison A. Wing, Yunpeng Shan   +20 more
wiley   +1 more source

DESIGNATING THE ERROR OF VERTICAL COORDINATE OF AIRCRAFT POSITION IN THE GPS SYSTEM

Scientific Journal of Silesian University of Technology. Series Transport, 2020
This article presents the results of research concerning the determination of an error of the vertical position of an aircraft during a flight, taking into account, the flight altitude and the values of the ZTD tropospheric product.
Małgorzata KIRSCHENSTEIN, Kamil KRASUSKI, Artur GOŚ   +2 more
doaj   +1 more source