Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5055
AuthorsPietrella, M.* 
Bianchi, C.* 
TitleOccurrence of sporadic-E layer over the ionospheric station of Rome: Analysis of data for thirty-two years
Issue Date1-Jul-2009
Series/Report no.1 / 44 ( 2009 )
DOI10.1016/j.asr.2009.03.006
URIhttp://hdl.handle.net/2122/5055
KeywordsSporadic-E layer
Geomagnetic activity
Solar activity
foEs occurrence
Subject Classification01. Atmosphere::01.03. Magnetosphere::01.03.99. General or miscellaneous 
AbstractHourly systematic measurements of the highest frequency reflected by the sporadic-E layer (foEs) recorded at the Rome ionospheric observatory (Italy, 41.8° N, 12.5° E), were considered during the period January 1976–December 2007, to calculate the percentage of occurrence of sporadic-E layer with frequencies foEs greater than a given threshold value fT, P(foEs > fT). To study possible influences from solar activity, measurements of foEs recorded near the periods of minimum and maximum solar activity, were also considered. Measurements of foEs recorded for the period January 2000–December 2007 were analysed to study the influence of magnetic activity on foEs occurrence frequency. The results are provided as maps showing P(foEs > fT) with foEs above the selected level (fT=3, 4, 5, 6, 7, 8, and 9 MHz), for each hour from 00.00 L.T. to 23.00 L.T. and for each month. The results reveal a relatively low P(foEs > fT) before sunrise and after sunset in all seasons; the most significant P(foEs > fT) occur during daytime in summer months; intense formations of sporadic-E layer occur rarely during the year; P(foEs > fT) does not depend significantly on solar and geomagnetic activity. 2009 COSPAR. Published by Elsevier Ltd. All rights reserved.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
occurrence-Pietrella.pdfmain article1.42 MBAdobe PDFView/Open
Show full item record

Page view(s)

216
Last Week
0
Last month
0
checked on Aug 21, 2017

Download(s)

36
checked on Aug 21, 2017

Google ScholarTM

Check

Altmetric