A New Method for Computing Ionogram-Based TEC Based on Digisonde data for Disaster Prevention

This paper presents a new approach for calculating the ionogram-based total electron content so as to be applied alternatively for alarming and preventing the disasters, for example, earthquake, tsunami or other space objectives. The proposed ITEC is estimated using the analytical expression of NeQuick model, the autoscaled Digisonde data, and a new variable "m" of 1. The results are show that 1) the proposed B0 is close to the B0_obs of Digisonde compared to the B0_IRI and the B2bot of the NeQuick model, 2) the diurnal variation of B0_Pro is the same as that of B0_obs compared to those of B0_IRI and B2bot, 3) the proposed ITEC is also close to the ITEC of Digisonde and TEC_iri, excluding the observed GPS TEC, and 4) all of the studied TEC values behave similar diurnal variations. Since the proposed ITEC is based on the analytical functions, the improvement of TEC_B0_Pro can be conducted reliably in order to close to the GPS TEC possibly and apply it optionally to correct the positioning errors for GNSS and aviation systems.