This study presents the results of a comparison of three ionospheric profile parameters, BO, 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 BO 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 BO, which is more pronounced during an equinox and daytime (0800-2000), respectively. A comprehensive discussion on the difference between the values of BO, NmF2, and hmF2 derived from two sources is provided in this paper. (C) 2011 Elsevier Ltd. All rights reserved.
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS