Premium
Nearly simultaneous images of HF‐pump enhanced airglow at 6300 Å and 5577 Å
Author(s) -
Gustavsson B.,
Brändström B. U. E.,
Steen Å.,
Sergienko T.,
Leyser T. B.,
Rietveld M. T.,
Aso T.,
Ejiri M.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015350
Subject(s) - airglow , ionosphere , physics , population , intensity (physics) , excitation , emission intensity , atomic physics , atmospheric sciences , optics , geophysics , luminescence , demography , quantum mechanics , sociology
This report presents nearly simultaneous images of HF‐pump enhanced airglow at 6300 Å and 5577 Å caused by HF radio wave pumping in the ionosphere from the EISCAT‐Heating facility. The images show co‐located enhancements implying that there are O ( 1 D ) and O ( 1 S ) emissions from the ionospheric F region. The maximum enhancement in 6300 Å is 50–60 Rayleighs and the maximum enhancement in 5577 Å is 10–20 Rayleighs for five different HF‐pump pulses. The 5577 to 6300 Å intensity ratio of 0.3–0.4 implies that the excitation is caused by a nonthermal electron population.