O(1S) Effective Lifetimes

Metadata record for data from ASAC Project 43 See the link below for public details on this project. From the abstract of the referenced paper: Intensity time-series with a 0.05 s time resolution were obtained for the 428 nm N2+ (1NG) band and 558 nm O(1S) line emissions during intervals of rapidly...

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Bibliographic Details
Other Authors: BURNS, GARY B. (hasPrincipalInvestigator), BURNS, GARY B. (processor), KLEKOCIUK, ANDREW R. (hasPrincipalInvestigator), KLEKOCIUK, ANDREW R. (processor), Australian Antarctic Data Centre (publisher)
Format: Dataset
Language:unknown
Published: Australian Antarctic Data Centre
Subjects:
geoscientificInformation
ENERGY DEPOSITION
EARTH SCIENCE
SUN-EARTH INTERACTIONS
SOLAR ENERGETIC PARTICLE PROPERTIES
ANARE Research Notes
impulse function
pulse excitation
Photometers
GROUND STATIONS
OCEAN &gt
SOUTHERN OCEAN
SOUTHERN OCEAN &gt
MACQUARIE ISLAND
CONTINENT &gt
ANTARCTICA
GEOGRAPHIC REGION &gt
POLAR
VERTICAL LOCATION &gt
IONOSPHERE
MESOSPHERE
Southern Ocean
Antarc*
Antarctica
Macquarie Island
Online Access:https://researchdata.ands.org.au/o1s-effective-lifetimes/700213
https://data.aad.gov.au/metadata/records/ASAC_43
http://nla.gov.au/nla.party-617536
Description
Summary:Metadata record for data from ASAC Project 43 See the link below for public details on this project. From the abstract of the referenced paper: Intensity time-series with a 0.05 s time resolution were obtained for the 428 nm N2+ (1NG) band and 558 nm O(1S) line emissions during intervals of rapidly fluctuating auroral intensities at Macquarie Island during 1988. Similar measurements have been used by previous workers to infer the effective lifetimes of the O(1S) state and the existence of, and percentage contribution from, an indirect excitation process. Using 'constructed data' and an impulse function analysis technique, we introduce a method of analysis that shows that variations in the energy of the precipitating auroral electrons during the intensity fluctuations may be misinterpreted as an indirect excitation process of low percentage contribution. Subsequent to our analysis of the data presented here, we became aware of 'pulse pile-up' contaminations of our raw data files. We have not corrected for this in the examples presented. However, our analysis shows that noise on the intensity time-series by itself, or in combination with the energy fluctuations, may result in a significant over-estimation of the contribution of an indirect excitation process. Measurement of the O(1S) effective lifetime is accurate to within 0.05 s. The method we introduce allows determination of an upper limit for the misinterpretation as an indirect process of non-linearites known to exist between the 428 nm N2+ (1NG) band and and 558 nm O(1S) line emissions. These non-linearites have been ignored in previous investigations of O(1S) excitation processes.

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