Results 91 to 100 of about 2,145,064 (260)

Inter-technique validation of tropospheric slant total delays [PDF]

Atmospheric Measurement Techniques, 2017
Abstract. An extensive validation of line-of-sight tropospheric Slant Total Delays (STD) from Global Navigation Satellite Systems (GNSS), ray-tracing in Numerical Weather Prediction Models (NWM) fields and microwave Water Vapour Radiometer (WVR) is presented.
Michal Kačmařík, Jan Douša, Galina Dick, Florian Zus, Hugues Brenot, Gregor Möller, Eric Pottiaux, Jan Kapłon, Paweł Hordyniec, Pavel Václavovic, Laurent Morel   +10 more
openaire   +7 more sources

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

Ocean Meanders Modulate Extratropical Cyclone Energetics

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Extratropical cyclones primarily develop over the western parts of ocean basins, where strong sea surface temperature (SST) contrasts form along western boundary currents. While previous studies have highlighted the influence of the mean SST and SST gradient on cyclones developing over these currents, they have generally disregarded their ...
Félix Vivant, Guillaume Lapeyre
wiley   +1 more source

Time and frequency transfer with a microwave link in the ACES/PHARAO mission

, 2012
The Atomic Clocks Ensemble in Space (ACES/PHARAO mission), which will be installed on board the International Space Station (ISS), uses a dedicated two-way Micro-Wave Link (MWL) in order to compare the timescale generated on board with those provided by ...
Delva, P., Laurent, P., Meynadier, F., Poncin-Lafitte, C. Le, Wolf, P.   +4 more
core   +1 more source

Global Assessment of the GNSS Single Point Positioning Biases Produced by the Residual Tropospheric Delay

Remote Sensing, 2021
The tropospheric delay is one of the main error sources that degrades the accuracy of Global Navigation Satellite Systems (GNSS) Single Point Positioning (SPP).
Ling Yang, Jinfang Wang, Haojun Li, Timo Balz   +3 more
doaj   +1 more source

Estimating Zenith Tropospheric Delay Based on GPT2w Model [PDF]

IEEE Access, 2019
To precisely and conveniently estimate zenith tropospheric delay (ZTD), troposphere refractivity is deduced through global pressure and temperature 2w (GPT2w) model and surface meteorology devices, ZTD is estimated based on integration of refractivity in the zenith direction. When surface meteorological measurements are absent, all parameters including
Zan Liu, Xihong Chen, Qiang Liu
openaire   +2 more sources

Differences in Phenological Estimation From Multi‐Vegetation Indices Across the Yellow River Basin

Ecology and Evolution, Volume 16, Issue 5, May 2026.
This study evaluated the differential performance of PPI, kNDVI, and EVI in monitoring land surface phenology across the Yellow River Basin. The three vegetation indices showed pronounced divergence in capturing autumn phenological metrics, particularly the downturn date (DD) and recession date (RD).
Qinyue Yu, Yan Bai, Juanle Wang
wiley   +1 more source

A nanoradian differential VLBI tracking demonstration [PDF]

, 1992
The shift due to Jovian gravitational deflection in the apparent angular position of the radio source P 0201+113 was measured with very long baseline interferometry (VLBI) to demonstrate a differential angular tracking technique with nanoradian accuracy.
Lowe, S. T., Treuhaft, R. N.
core   +1 more source

Revisiting Intrinsic Predictability of Wave‐Convection Coupled Bands Over Southern China: Variable and Scale‐Dependent Error Growth Characteristics

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract This study investigates the variable‐ and scale‐dependent intrinsic predictability of wave‐convection coupled bands over southern China on 30 January 2018, using 1‐km simulations under varying initial moisture conditions. The predictability time is quantified via the Loss Predictability Index (LPI), defined as the ratio of the forecast error ...
Manshi Weng, Junhong Wei, Yu Du, Y. Qiang Sun, Xubin Zhang   +4 more
wiley   +1 more source

High resolution forecast models of water vapour over mountains: comparison of results from the UM and MERIS [PDF]

, 2007
Propagation delay due to variable tropospheric water vapor (WV) is one of the most intractable problems for radar interferometry, particularly over mountains.
Clark, P.A., Holley, R.J., James, I.N., Wadge, Geoffrey, Wang, C., Woodage, M.J., Zhu, M   +6 more
core   +1 more source