• Login
    View Item 
    •   Home
    • University of Alaska Fairbanks
    • Geophysical Institute
    • Publications
    • GI Reports
    • View Item
    •   Home
    • University of Alaska Fairbanks
    • Geophysical Institute
    • Publications
    • GI Reports
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Scholarworks@UACommunitiesPublication DateAuthorsTitlesSubjectsTypeThis CollectionPublication DateAuthorsTitlesSubjectsType

    My Account

    Login

    First Time Submitters, Register Here

    Register

    Statistics

    Display statistics

    Results of a Survey of IGY Patrol Spectra at College, Alaska

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    GI Reports 113.pdf
    Size:
    1.416Mb
    Format:
    PDF
    Download
    Author
    Herman, L.
    Belon, A. E.
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/3643
    Abstract
    The behavior of prominent auroral emissions has been studied statistically using the IGY patrol spectrograms obtained at College, Alaska during the International Geophysical Year. Results are presented in the form of mean diurnal intensity variations and in the form of correlation tables. Both presentations suggest the occurrence of two types of auroras. One is relatively weak, has a broad intensity maximum around magnetic midnight, and contains the hydrogen Balmer emissions. The other gradually increases in intensity until magnetic midnight and thereafter maintains a high intensity level until dawn. Its spectrum is usually characterized by the presence of the first positive bands of N2. The mean diurnal intensity variation of the sodium emission suggests that the twilight enhancement of the sodium D-lines persists to much greater solar depression angles than those previously reported. Some evidence is found for a small auroral contribution to the sodium emission. This contribution is however erratic and does not correlate well with any specific auroral emission. The (OI) 6364A emission shows, as expected, a strong twilight enhancement persisting to large solar depression angles. No enhancement is observed for the (OI) 5577A emission. A weak correlation is found between the intensity of the hydrogen Balmer emissions and the occurrence of red auroras.
    Description
    FOREWORD -- This report is an enlarged and revised version of an original study conducted by one of us (HERMAN, 1960 ). Several additional emissions of the auroral spectrum are studied. In order to ascertain and clarify some unexpected results of the original study the spectroscopic data has been re-classified into three well defined groups which are analysed separately. Data of questionable quality are removed. It appears that this new study resolves ambiguities present in the original results and allows revised and new interpretations to be advanced.
    Table of Contents
    Abstract -- Introduction : Instrumentation ; Radiations measured ; Intensity estimates -- Mean Diurnal Intensity Variation of Prominent Emissions : H-alpha ; First positive system of N2 ; Second positive system of N2 ; First negative system of N2 ; Red oxygen line 6364A - 2/1 (OI) ; Green oxygen line 5577A - 3/2 (OI) ; Sodium D-lines -- Spectral intensity Distribution in the Aurora -- Classification of Auroral Spectra : Type B (low altitude) ; Type AB ; Type A ; High latitude airglow ; Abnormal spectra - Fast proton spectra sodium emission -- Appendix -- Acknowledgements -- References
    Date
    1961-03
    Source
    Geophysical Institute
    Publisher
    Geophysical Institute at the University of Alaska
    Type
    Report
    Peer-Reviewed
    Yes
    Collections
    GI Reports

    entitlement

     
    ABOUT US|HELP|BROWSE|ADVANCED SEARCH

    The University of Alaska Fairbanks is an affirmative action/equal opportunity employer and educational institution and is a part of the University of Alaska system.

    ©UAF 2013 - 2023 | Questions? ua-scholarworks@alaska.edu | Last modified: September 25, 2019

    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.