Evaluation of the orbit altitude electron density estimation and its effect on the Abel inversion from radio occultation measurements

摘要: [1] In this paper, the observations from CHAMP radio occultation (RO) and Planar Langmuir Probe (PLP) during 2002–2008 Constellation Observing System for Meteorology Ionosphere Climate (COSMIC) 2007.090–2007.120 are used to evaluate orbit altitude electron density estimation its effect on Abel inversion RO measurements. Comparison between PLP observed estimated board shows that tends overestimatethetrueorbitelectrondensityby10%averagely.Theaveragerelativedeviation is ∼20% decreases slightly with increase of ionospheric peak height satellite orbit. It larger at nighttime than daytime peaks around sunrise time. Simulations based COSMIC using NeQuick model indicate solar activity variations will not influence ratio successfully retrieved profiles events relative error as well. Different derivation methods, including by total content, given an independent onorbitobservation, andassumed beequalto thetopmostpoint, willhaveno essential density. Adding observation even has a negative altitude, which contrary our imagination.