Results 41 to 50 of about 630 (149)

China's Ground‐Based Space Environment Monitoring Network—Chinese Meridian Project (CMP)

open access: yesSpace Weather, Volume 22, Issue 7, July 2024.
Abstract Monitoring and investigation of the solar‐terrestrial space environment is a huge challenge for humans in space age. To this end, China has established the Ground‐based Space Environment Monitoring Network, namely Chinese Meridian Project (CMP).
Chi Wang   +6 more
wiley   +1 more source

Statistical analysis of microflares as observed by the 4–8 GHz spectropolarimeter

open access: yesSolar-Terrestrial Physics, 2023
Radio observations of weak events are one of the promising methods for studying energy release and non-thermal processes in the solar corona. The development of instrumental capabilities allows for radio observations of weak transient coronal events ...
Zhdanov D. A.   +3 more
doaj   +1 more source

A Genetic Algorithm to Model Solar Radio Active Regions From 3D Magnetic Field Extrapolations

open access: yesFrontiers in Astronomy and Space Sciences, 2022
In recent decades our understanding of solar active regions (ARs) has improved substantially due to observations made with better angular resolution and wider spectral coverage.
Alexandre José de Oliveira e Silva   +12 more
doaj   +1 more source

A multi-periodic oscillatory event in a solar flare [PDF]

open access: yes, 2008
Aims. Ratios of different significant periods found in the light curves of a solar flare exhibiting quasi-periodic pulsations (QPP) are used to distinguish between the possible physical mechanisms responsible for such periodic behaviour. Methods.
V. M. Nakariakov   +3 more
core   +1 more source

On the solar origin of interplanetary disturbances observed in the vicinity of the Earth [PDF]

open access: yesAnnales Geophysicae, 2003
The solar origin of 40 interplanetary disturbances observed in the vicinity of the Earth between January 1997 and June 1998 is investigated in this paper.
N. Vilmer   +4 more
doaj   +1 more source

CHROMOSPHERIC SUNSPOTS IN THE MILLIMETER RANGE AS OBSERVED BY THE NOBEYAMA RADIOHELIOGRAPH [PDF]

open access: yesThe Astrophysical Journal, 2016
ABSTRACT We investigate the upper chromosphere and the transition region of the sunspot umbra using the radio brightness temperature at 34 GHz (corresponding to 8.8 mm observations) as observed by the Nobeyama Radioheliograph (NoRH). Radio free–free emission in the longer millimeter range is generated around the transition region, and ...
Kazumasa Iwai   +5 more
openaire   +2 more sources

Australian Journal of Physics Astrophysical Supplements

open access: yes, 1973
A description of nine moving type IV radio events is given, which completes the description of 24 such events observed with the 80 MHz Culgoora radioheliograph between September 1968 and November 1971.
EJ Schmahl
core   +1 more source

Possible errors in radio source parameters recovered by the fitting method related to anisotropy of the electron distribution

open access: yesSolar-Terrestrial Physics
This paper examines errors in recovering (radio diagnostics) solar flare parameters (magnetic field, accelerated electron density, etc.) by fitting microwave spectra.
Smirnov Dmitriy, Melnikov Viktor
doaj   +1 more source

Electron acceleration and transport in the 2023-03-06 solar flare

open access: yesFrontiers in Astronomy and Space Sciences
We investigated in detail the M5.8 class solar flare that occurred on 2023-03-06. This flare was one of the first strong flares observed by the Siberian Radioheliograph in the microwave range and the Advanced Space-based Solar Observatory in the X-ray ...
Alexey Kuznetsov   +8 more
doaj   +1 more source

High Spatial Resolution imaging for the Nobeyama Radioheliograph and Observations of Weak Activities Prior to Solar Flares [PDF]

open access: yes, 1997
総合研究大学院大学博士(学術)This paper is two-fold. Firstly, we present 'High Spatial Resolution Imaging for the Nobeyama Radioheliograph' which enable us to synthesize partial frame images of the Sun with a spatial resolution of 10 arcsec at 17 GHz, and secondly ...
フジキ, ケンイチ   +2 more
core  

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