Lightning radiometry in visible and infrared bands

Wemhoner, Jacob; Wermer, Lydia; Silva, Caitano L. da; Barnett, Patrick; Radosevich, Cameron; Patel, Sonal; Edens, Harald

doi:10.1016/j.atmosres.2023.106855

Cited by 2 publications

(4 citation statements)

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“…According to Laux et al (1995), emission from up to 7900-K air plasma in that band is due to an unidentified continuum and is very different from emission in the 3-5 μm band, which is examined in this study and discussed below. For 10 negative cloud-to-ground discharges, Wemhoner et al (2023) found the mean duration of the recorded IR power pulse to be 0.13 ms, which was about a factor of 2 shorter than that for simultaneously recorded visible to near IR (0.34-1.1 μm) power pulse, and the mean power pulse peak was a factor of 2.7 × 10 3 lower. Their IR photodiode had a field of view of 2.8°versus 5.8°for the visible plus near IR photodiode.…”

Section: Introductionmentioning

confidence: 74%

“…For 10 negative cloud‐to‐ground discharges, Wemhoner et al. (2023) found the mean duration of the recorded IR power pulse to be 0.13 ms, which was about a factor of 2 shorter than that for simultaneously recorded visible to near IR (0.34–1.1 μm) power pulse, and the mean power pulse peak was a factor of 2.7 × 10 −3 lower. Their IR photodiode had a field of view of 2.8° versus 5.8° for the visible plus near IR photodiode.…”

Section: Introductionmentioning

confidence: 97%

“…More recently, Wemhoner et al (2023), working at the Langmuir Laboratory in New Mexico, obtained photoelectric observations of lightning in the 2-2.5 μm IR band. According to Laux et al (1995), emission from up to 7900-K air plasma in that band is due to an unidentified continuum and is very different from emission in the 3-5 μm band, which is examined in this study and discussed below.…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Wemhoner et al. (2023), working at the Langmuir Laboratory in New Mexico, obtained photoelectric observations of lightning in the 2–2.5 μm IR band. According to Laux et al.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Lightning Channel Luminosity Versus Time Profiles in the Infrared and Visible Ranges

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Infrared (IR) luminosity of lightning channel in the 3–5 μm range usually persisted throughout the entire interstroke interval, which is in contrast to the simultaneously recorded visible (0.4–0.8 μm) luminosity that always decayed to an undetectable level prior to a subsequent return stroke pulse. A longer visible luminosity period at the end of flash tended to be associated with a longer IR afterglow period following the decay of visible luminosity (and by inference current) to an undetectable level. At the end of flash, the IR luminosity persisted up to about 1 s, and the median IR afterglow duration was a factor of 10 longer than the median visible luminosity duration. The IR luminosity often exhibited a hump when the visible luminosity was monotonically decaying or undetectable, with the corresponding channel temperature being likely around 3400 K.

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 97%