English  |  正體中文  |  简体中文  |  Items with full text/Total items : 67783/67783 (100%)
Visitors : 23095428      Online Users : 187
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50399

    Title: Quiet time meridional (vertical) ion drifts at low and middle latitudes observed by ROCSAT-1
    Authors: Pacheco,EE;Heelis,RA;Su,SY
    Contributors: 太空科學研究所
    Date: 2010
    Issue Date: 2012-03-27 17:30:53 (UTC+8)
    Publisher: 國立中央大學
    Abstract: In situ ion drift observations from the ROCSAT-1 satellite, near the 600 km altitude and for the years 1999-2003, are used to describe variations in the local time (LT) distribution of meridional E x B drifts at low and middle latitudes, for different longitudes and seasons. We derive the ion drifts in the direction perpendicular to the magnetic field during quiet times defined by Kp <= 3 and Dst > -100 nT. Offsets in the original data are removed by considering separately the northbound and southbound passes in a given volume and by enforcing magnetic conjugacy for the ion drift components perpendicular to the magnetic field. Three major features are identified for which the variations in latitude, longitude, and season allow the major drivers of these features to be indicated: (1) a latitude/magnetic apex height variation in the prereversal (after sunset) enhancement of the vertical drift that is attributed to similar variations in the flux tube-integrated Pedersen conductivity, (2) the daytime meridional drifts that are largely driven by the E region dynamo show significant latitude variations that are attributed to the relative importance of diurnal and semidiurnal wind fields as a function of latitude, and (3) a downward enhancement of the ion drift before sunrise is attributed to a reversal in the F region zonal wind during the nighttime.
    Appears in Collections:[太空科學研究所 ] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明