Comparisons of Ion Density From IVM With the GNSS Differential TEC‐Derived Electron Density on the FORMOSAT‐7/COSMIC‐2 Mission
Comparisons of Ion Density From IVM With the GNSS Differential TEC‐Derived Electron Density on the FORMOSAT‐7/COSMIC‐2 Mission
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FORMOSAT-7/COSMIC-2 任务中 IVM 的离子密度与 GNSS 差分 TEC 导出的电子密度的比较
DOI:
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发表时间:
2022
期刊:
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通讯作者:
T. Vanhove
中科院分区:
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作者:
Qian Wu;N. Pedatella;J. Braun;W. Schreiner;J. Weiss;M. Chou;I. Zakharenkova;I. Cherniak;D. Hunt;R. Heelis;T. Vanhove
We report on a new method to derive the on‐orbit electron density using the Tri Global Navigation Satellite System (GNSS) Radio‐occultation System (Tri‐GNSS Radio occultation System (TGRS)) differential total electron content data and compare it to the Constellation Observing System for Meteorology Ionosphere and Climate‐2 Ion Velocity Meter (IVM) ion density data. We found that the IVM ion density is about 8%–15% lower than the TGRS derived density at the insertion orbit (∼710 km) and 5% higher at the mission operation orbit (∼540 km) for reasons that are currently unknown. Using a linear coefficient, we scaled the IVM data to remove the offset between TGRS‐derived electron density and the IVM ion density for the two orbital heights. We believe the scaled IVM densities eliminate any inter‐spacecraft discrepancy, making the IVM data suitable for use in high precision multi‐satellite scientific investigations of longitudinal and local time variations of non‐migrating tides, planetary waves and space weather operational applications.