Modification of IRI half-density height option for low latitudes
暂无分享,去创建一个
Abstract The International Reference Ionosphere provides an option for using the half-density height h0.5 when determining the bottom-side electron density profile. For low latitudes the ratio h0.5/hmF2 (peak height) is modified using Arecibo incoherent scatter electron density profiles. A linear variation with latitude of the coefficients is introduced for nighttime and daytime in case h0.5 is located above the F1 layer heights (class ‘A’). The profile semithickness is large when 0.5NmF2 value is less than NmF1 (class ‘B’). At low latitudes class ‘B’ occurs during the first half of the day; at mid-latitudes, however, the Digisonde data from Millstone Hill show these to occur during most of the daytime.
[1] B. Reinisch,et al. Statistical studies of the N(h) profile of the ionosphere using automatically scaled digital ionograms , 1991 .
[2] Xueqin Huang,et al. Validating ionospheric models with measured electron density profiles , 1994 .
[3] T. Gulyaeva. Progress in ionospheric informatics based on electron-density profile analysis of ionograms , 1987 .
[4] N. Sethi,et al. Variability of the F-region parameter h0.5 , 1995 .