Comparisons of Ion Density From IVM With the GNSS Differential TEC‐Derived Electron Density on the FORMOSAT‐7/COSMIC‐2 Mission

Abstract We report on a new method to derive the on‐orbit electron density using Tri Global Navigation Satellite System (GNSS) Radio‐occultation (Tri‐GNSS Radio occultation (TGRS)) differential total content data and compare it Constellation Observing for Meteorology Ionosphere Climate‐2 Ion Velocity Meter (IVM) ion data. found that IVM is about 8%–15% lower than TGRS derived at insertion orbit (∼710 km) 5% higher mission operation (∼540 reasons are currently unknown. Using linear coefficient, we scaled remove offset between TGRS‐derived two orbital heights. believe densities eliminate any inter‐spacecraft discrepancy, making suitable use in high precision multi‐satellite scientific investigations of longitudinal local time variations non‐migrating tides, planetary waves space weather operational applications.