Variability of the behavior of the bottomside(B0,B1)parameters obtained from the ground-based ionograms at China's low latitude station
会议名称：《中国科学院地质与地球物理研究所2008学术年会》
会议日期：2009年
学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学]
基 金：supported by the KIP Pilot Project (kzcx3-sw-144)of the Chinese Academy of Sciences National Important Basic Research Project(2006CB806306) National Natural Science Foundation of China (40636032)
关 键 词：Low latitude ionosphere Ionospheric variability IRI model Ionospheric modeling
摘 要：In this paper,data of(B0,B1) parameters deduced from the electron density profiles that are inverted from the ionograms recorded at Hainan(19.4°N,109.0°E),China during a three year period from March 2002 to February 2005 are used to study the diurnal and seasonal variation of(B0,B1) parameters at low *** observational results are compared with the IRI2001 model *** study of(B0,B1) in terms of percentage ratio of the inter-quartiles to the median values and correlative analysis between(B0,B1) parameters and other ionospheric characteristics such as hmF2 and M(3000)F2 are also *** present study showed that:(1)for daytime hours,the IRI2001 model results with new table option(B0ab) is in a better agreement with the observational results (B0bs) than the IRI2001 model results with Gulyaeva option(B0ul) for summer season,whereas B0ul is in a better agreement with B0bs than B0ab for winter *** nighttime,in general,B0ul is in a better agreement with B0bs than *** other occasions,both B0ab and B0ul showed some systematic deviations from the observational ***,the deviations of B0ab and B0ul from B0bs showed opposite trends;(2)the monthly upper(lower) quartiles of(B0,B1) parameter showed a good linear relationship with the monthly median values,this makes it possible to do the regression analysis between the monthly upper (lower) quartiles and the monthly median values,which can give a measure of the variability of these *** terms of the percentage ratio of the inter-quartiles to the median values,the variability of B0 showed a diurnal variation ranging between 22%and 36% with maximum value occurring at pre-sunrise hours,whereas the variability of B1 showed a diurnal variation ranging between 15%and 30%with higher value by daytime than at night;(3)B0 shows high linear correlative relationships with hmF2 and M(3000)F2 for most of the local time period of a day except for a few hours around midnight,whereas Bl show