A study on the ionospheric parameter f02 instantaneous mapping based on equivalent sunspot number

A CRI (Chinese Reference Ionosphere model) based kriging real time updating method for f
0
2
is presented in this paper. This method uses effective sunspot number ( eff R ) and selects the relative difference between the observed and the CRI model calculated values of f
0
2
as the variable. During solar maximum, the root mean square error is 1.32MHz and the relative error is 14.86%. While during solar minimum, the root mean square error is 1.06 MHz, and the relative error is 19.02%. On average, the globally root mean square error is 1.2MHz, and the globally relative error is 17.07%. The evaluate method of ‘relative comparison method’ is put forward, and by comparing with the algorithm without using R
eff
, the root mean square error is reduced by 0.75%,and the relative error is decreased by 1.05%.