Results 41 to 50 of about 1,793,812 (174)
Solar Radio Bursts in Relation to Flare Importances.
The Astrophysical Journal, 1963 S>The association solar radio bursts over the frequency range 200 to 9400 Mc with solar flares of different importances is investigated. Percentage association is highest at a frequency of about 4000 Mc, except for 3/sup +/ flares, in which the maximum association remains oonstant within the frequency range 1000- 5000 Mc. Centimeter bursts are found to
M. K. Das Gupta, D. Basu
openaire +1 more source
Global Ionospheric Responses to Four X‐Class Solar Flares in November 2025
Space Weather, Volume 24, Issue 11, November 2026.Abstract We investigate global ionospheric responses to four X‐class solar‐disk flares that occurred in November 2025 from the same solar active region, using multi‐instrument observations including GNSS, ionosonde, geomagnetic and GOES solar irradiance data. Pronounced dayside TEC enhancements are observed for three flares (#2 X1.2, #3 X5.1, and #4 X4.
Lei Liu, Shasha Zou
wiley +1 more source
Statistical analysis of microflares as observed by the 4–8 GHz spectropolarimeter
Solar-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
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A validated 3D point‐cloud analysis workflow for the creation of seagrass canopy height models
Methods in Ecology and Evolution, Volume 17, Issue 11, Page 3136-3156, November 2026.Abstract Seagrasses support highly productive ecosystems in both temperate and tropical waters and provide essential ecosystem services. Despite their importance, the vertical structure of seagrasses (i.e. the canopy) remains poorly characterised at the microscale, even though it is a strong predictor of ecological processes that influence both ...
Daniele Ventura
wiley +1 more source
, 1986 High resolution (arcseconds to ten of arcseconds) mapping of solar microwave bursts has recently been achieved. The properties of the radio images that have been reported and, so far as possible, the relation of the radio sources to X-ray observations of
Dulk, G. A.
core
Advanced Electronic Materials, Volume 12, Issue 20, 26 October 2026.A compact QASRR‐based THz metamaterial absorber enables polarization‐insensitive dual‐band absorption and skin‐cancer‐related refractive‐index sensing through measurable resonance shifts. Field, surface‐current, and circuit analyses clarify the dual‐resonance mechanism, while StackNet‐assisted prediction accurately estimates the simulated absorption ...
Md. Murad Kabir Nipun +5 more
wiley +1 more source
Are There Radio-quiet Solar Flares? [PDF]
, 2018 Some 15% of solar flares having a soft X-ray flux above GOES class C5 are reported to lack coherent radio emission in the 100 - 4000MHz range (type I - V and decimetric emissions). A detailed study of 29 such events reveals that 22 (76%) of them occurred
Brajša, Roman +2 more
core
Solar observing system for radio frequencies 5–120 MHz
, 2020 The Aalto University Metsähovi Radio Observatory (MRO) in Finland installed and started operating a new low-frequency solar radio monitoring instrument in October 2017.
Tornikoski, M. +6 more
core +1 more source
Electron Cyclotron Maser Emission and the Brightest Solar Radio Bursts
The Astrophysical JournalThis paper investigates the incidence of coherent emission in solar radio bursts, using a revised catalog of 3800 solar radio bursts observed by the Nobeyama Radio Polarimeters from 1988 to 2023.
Stephen M. White +7 more
doaj +1 more source
Signal Strength of VLF Radio Wave Measured at Syowa Station in Antarctica
Antarctic Record, 1976 The measurement of NAA-17.8 kHz signal strength was made at Syowa Station, Antarctica, for one year from February 1970 to January 1971. The diurnal and seasonal variations of the signal strength are shown.
Toshirou SAKAMOTO, Isao SHIRO
doaj +1 more source