Results 91 to 100 of about 3,196 (215)

Iterative Weighted Least Squares Solution to InSAR Stratified Tropospheric Phase Delay

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Phase-elevation regression has demonstrated the ability to mitigate the impacts of vertically stratified tropospheric phase delay on interometric synthetic aperture radar (InSAR) phase observations.
Hailu Chen, Yunzhong Shen, Lei Zhang
doaj   +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

High‐Latitude GPS Position Error During Substorms

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Substorms produce rapid fluctuations in Global Navigation Satellite System (GNSS) signals, leading to degraded positioning performance at high latitudes. This study investigates the correlation of auroral structures on Global Positioning System (GPS) Precise Point Positioning (PPP) error during three substorm events with different strengths ...
Weixuan Liao, Yukitoshi Nishimura, Waqar Younas, Wen Li, Keith M. Groves, Eric F. Donovan, Vassilis Angelopoulos   +6 more
wiley   +1 more source

A New Tropospheric Delay Model For

, 2001
GPS can play an important role in high-altitude vehicle positioning. In such GPS applications the residual tropospheric delay in GPS measurements is a major error source.
Jinling Wang, Toshiharu Inagaki, Masatoshi Harigae, High-Altitude Vehicle Positioning, Chris Rizos, Toshiaki Tsujii   +5 more
core  

The Impact of Simplified UNBab Mapping Function On GPS Tropospheric Delay [PDF]

, 2014
The atmospheric delay issue is widely investigated in order to minimize the positioning error due to tropospheric and ionospheric delay. The mathematical modeling on the tropospheric model mapping functions should be revised and also simplified to ...
Sakidin, Hamzah, Asmala, A., Tay, Choo Chuan   +2 more
core   +1 more source

Mitigating Elevation-Dependent Errors in Tropospheric Delay Interpolation for InSAR Applications [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Interferometric Synthetic Aperture Radar (InSAR) is a powerful tool for detecting ground deformation with millimeter precision. However, atmospheric effects, particularly tropospheric delays, significantly degrade the accuracy of InSAR-derived ...
E. Nekouzade Chaharmahali, J. Asgari
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

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

Automated monitoring of road surfaces taking into account the correction of tropospheric delays of satellite navigation signals

Вестник Самарского государственного технического университета. Серия: Технические науки
The article considers the development of an automated road surface monitoring subsystem taking into account the correction of tropospheric delays of satellite navigation signals. Global and regional tropospheric models recommended by ICAO SARPS and their
K. Badanis
doaj   +1 more source

Land Subsidence Susceptibility Mapping in Semi‐Arid Regions Using PS‐InSAR and Tree‐Based Ensemble Machine Learning: A Case Study From Çumra, Türkiye

Transactions in GIS, Volume 30, Issue 4, June 2026.
ABSTRACT Land subsidence is an increasing environmental hazard in semi‐arid agricultural basins where intensive groundwater abstraction, compressible geological units, and expanding land‐use pressures interact. This study presents a PS‐InSAR and machine‐learning‐based framework for land subsidence susceptibility mapping in the Çumra District of the ...
Burhan Baha Bilgilioğlu
wiley   +1 more source