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:
Journal of Geophysical Research: Space Physics
影响因子:
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通讯作者:
T. Vanhove
T. Vanhove
中科院分区:
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文献类型:
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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

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我们报道了一种利用三颗全球导航卫星系统(GNSS)无线电掩星系统(TGRS)差分总电子含量数据计算在轨电子密度的新方法,并将其与星座气象学、电离层和气候2号离子速度计(IVM)离子密度数据进行了比较。我们发现,由于目前未知的原因,在插入轨道(∼710公里)的离子密度比TGRS导出的密度低8%-15%,而在任务运行轨道(∼540公里)则高5%。使用线性系数,我们缩放了IVM数据,以消除TGRS导出的电子密度和IVM离子密度之间的偏移量。我们相信,定标的IVM密度消除了航天器间的任何差异,使IVM数据适合用于高精度多卫星科学调查非迁徙潮汐、行星波和空间气象业务应用的纵向和局部时间变化。
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.