Results 131 to 140 of about 71,530 (301)

Multiple‐Event Study of Substorm Electric Field Penetration Into Middle Latitudes Based on Simultaneous Observation of 630‐nm Airglow Enhancements at Three Stations

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract It is known that convection electric fields develop in the polar region associated with substorm onset, and a westward electric field penetrates to lower latitudes on the night side. Two‐dimensional observations of 630‐nm airglow enhancements associated with the westward electric field can be conducted using all‐sky cameras at middle latitudes.
S. Morita   +10 more
wiley   +1 more source

Accurate Spectral Fitting in the Upper F‐Region Using the Randomly Coded Data of the Arecibo 430 MHz Radar

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Accurately resolving the ion composition in the upper F2 region and topside ionosphere remains a challenge due to temperature‐composition ambiguity and measurement limitations. This study presents a hybrid fitting algorithm that combines exhaustive dictionary search with gradient descent to improve the estimation of incoherent scatter spectrum
Yanlin Li, Qihou Zhou
wiley   +1 more source

PKIKP Phase Back‐Projection and Its Application on Southern Hemisphere Earthquake Imaging

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Standard Back‐Projections (BPs) use P phase recordings at large aperture arrays within teleseismic distances (30°–90°) to image earthquake sources. However, the majority of sizable arrays are in the northern hemisphere, leaving many southern hemisphere earthquakes beyond the teleseismic range.
Liuwei Xu, Lingsen Meng, Risheng Chu
wiley   +1 more source

Doppler Radar Relationships for Hail at Vertical Incidence [PDF]

open access: bronze, 1977
Carlton W. Ulbrich
openalex   +1 more source

Characteristics of Sunset radar [PDF]

open access: yes, 1983
Located in a narrow canyon 15 km west of Boulder, Colorado, the Sunset pulsed Doppler radar was the first radar designed and constructed specifically as a VHF ST radar.
Green, J. L.
core   +1 more source

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