Comparison between bottomside ionospheric profile parameters retrieved from FORMOSAT3 measurements and ground-based observations collected at Jicamarca

This study presents the results of a comparison of three ionospheric profile parameters, B0, NmF2, and hmF2, derived from measured ionograms and the FORMOSAT3 radio occultation measurements collected over Jicamarca during the low-solar-activity period from May 2006 to April 2008. The results show that the B0 values are generally in good agreement with those derived from the true electron density profiles. In addition, correlation analysis revealed seasonal and diurnal variation in B0, which is more pronounced during an equinox and daytime (0800–2000), respectively. A comprehensive discussion on the difference between the values of B0, NmF2, and hmF2 derived from two sources is provided in this paper.

► A comparison of the electron density profiles between RO and digisonde observations.
► The B0 between measured RO and digisonde shows a good agreement during daytime hours.
► The most consistent seasonal changes of the B0 were observed at the equinox during low solar activity.
► The correlation coefficient of NmF2 for the RO retrieved values and digisonde is higher in summer.
► The correlation coefficient of hmF2 for the RO retrieved values and digisonde is higher in equinox.