Results 71 to 80 of about 1,062 (188)

Troposphere delay modeling in SLR based on PMF, VMF3o, and meteorological data

Progress in Earth and Planetary Science
Satellite laser ranging (SLR) requires accurate troposphere delay models to properly correct the observed distances to satellites and derive fundamental geodetic and geodynamic parameters.
Mateusz Drożdżewski, Krzysztof Sośnica   +1 more
doaj   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source

Frequency Standard Contributions to Limitations on the Signal‐to‐Noise Ratio in Very Long Baseline Interferometric Observations

Radio Science, Volume 61, Issue 6, June 2026.
Abstract Since its observation in 2019, the first image of a super‐massive black hole using Very Long Baseline Interferometry (VLBI) with an Earth‐scale baseline has generated much scientific and public interest. Work is now underway to extend the baseline into space to obtain higher image resolution.
E. A. Burt, T. A. Ely, G. C. Bower, T. J. W. Lazio, M. Anderson, S. Hernandez   +5 more
wiley   +1 more source

Empirical Modeling of Tropospheric Delays and Uncertainty

Abstract. Accurate modeling of troposphere delay is important for high-precision data analysis of space geodetic techniques, such as the Global Navigation Satellite System (GNSS). The empirical troposphere delay models provide zenith delays with an accuracy of 3 to 4 cm globally and do not rely on external meteorological input.
Jungang Wang, Junping Chen, Yize Zhang
openaire   +2 more sources

Simulating Future Dynamics of a Groundwater‐Fed Lake in Central Europe: Integrating Modeling and Machine Learning Approach

Water Resources Research, Volume 62, Issue 6, June 2026.
Abstract Freshwater systems in Central Europe are increasingly vulnerable to climate change and anthropogenic pressures. This study investigates future dynamics of Lake Groß Glienicke, a groundwater‐fed lake experiencing rapid water‐level decline in recent decades.
Nariman Mahmoodi, Márk Somogyvári, Can Ölmez, Franziska Tügel, Reinhard Hinkelmann, Michael Schneider, Christoph Merz   +6 more
wiley   +1 more source

An Adaptive Multipath Mitigation Filter for GNSS Applications

EURASIP Journal on Advances in Signal Processing, 2008
Global navigation satellite system (GNSS) is designed to serve both civilian and military applications. However, the GNSS performance suffers from several errors, such as ionosphere delay, troposphere delay, ephemeris error, and receiver noise and ...
Jyh-Ching Juang, Chung-Liang Chang
doaj   +1 more source

Drivers of F‐Region Ionosphere Tidal Variability Caused by the Madden Julian Oscillation: Separating E‐Region Dynamo and Field‐Aligned Wind Effects

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract The Madden–Julian Oscillation (MJO), a recurring intraseasonal (30–96 days) disturbance in the troposphere, strongly influences the E‐region and F‐region ionosphere through its modulation of atmospheric tides. Among these, the diurnal eastward wave number 3 (DE3) tide, driven by MJO‐modulated latent heating, carries MJO signals upward into the
Deepali Aggarwal, Jens Oberheide, B. C. Martinez, Xian Lu, Sunil Kumar   +4 more
wiley   +1 more source

Small Scale Variability in the Wet Troposphere Impacts the Interpretation of SWOT Satellite Observations

Geophysical Research Letters
The Surface Water and Ocean Topography (SWOT) mission offers new insights into submesoscale ocean processes. Realizing this requires careful consideration of other geophysical signals such as the signal delay induced by water vapor in the troposphere ...
Andrea Hay, Christopher Watson, Benoit Legresy, Matt King, Jack Beardsley   +4 more
doaj   +1 more source

Regional and Seasonal Effects of Geomagnetic Storms on Terrestrial Weather

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract It has long been a mystery why small Total Solar Irradiation changes have significant effects on Earth's climate. Solar cycle correlation studies abound but cannot conclusively point to a viable physical mechanism. Here, I show that geomagnetic storms have a profound terrestrial weather impact.
J. Raeder
wiley   +1 more source

DNS (v1.0): an open-source ray-tracing tool for space geodetic techniques [PDF]

Geoscientific Model Development
We have developed an open-source ray-tracing tool for space geodetic techniques. The software uses the geometric optics approximation to calculate the signal travel time delay induced by the atmosphere between two given points.
F. Zus, K. Balidakis, K. Balidakis, A. H. Dogan, R. Thundathil, R. Thundathil, G. Dick, J. Wickert, J. Wickert   +8 more
doaj   +1 more source