Processing and Validation of FORMOSAT-7/COSMIC-2 GPS Total Electron Content Observations

被引：20

作者：

Pedatella, N. M. ^{[1
,2
]}

Zakharenkova, I ^{[2
]}

Braun, J. J. ^{[2
]}

Cherniak, I ^{[2
]}

Hunt, D. ^{[2
]}

Schreiner, W. S. ^{[2
]}

Straus, P. R. ^{[3
]}

Valant-Weiss, B. L. ^{[3
]}

Vanhove, T. ^{[2
]}

Weiss, J. ^{[2
]}

Wu, Q. ^{[1
,2
]}

机构：

[1] Natl Ctr Atmospher Res, High Altitude Observ, POB 3000, Boulder, CO 80307 USA

[2] Univ Ctr Atmospher Res, COSM Program Off, Boulder, CO 80301 USA

[3] Aerosp Corp, El Segundo, CA 90245 USA

来源：

RADIO SCIENCE | 2021年 / 56卷 / 08期

基金：

美国国家科学基金会;

关键词：

COSMIC-2; GNSS total electron content; topside ionosphere and plasmasphere; GPS; IONOSPHERIC RESPONSE; RADIO OCCULTATION; NEQUICK;

D O I：

10.1029/2021RS007267

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Slant absolute total electron content (TEC) is observed by the Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (FORMOSAT-7/COSMIC-2, F7/C2) Tri-GNSS Radio Occultation System (TGRS) instrument. We present details of the data processing algorithms, validation, and error assessment for the F7/C2 global positioning system (GPS) absolute TEC observations. The data processing includes estimation and application of solar panel dependent pseudorange multipath maps, phase to pseudorange leveling, and estimation of separate L1C-L2C and L1C-L2P receiver differential code biases. We additionally perform a validation of the F7/C2 GPS absolute TEC observations through comparison with colocated, independent, TEC observations from the Swarm-B satellite. Based on this comparison, we conclude that the accuracy of the F7/C2 GPS absolute TEC observations is less than 3.0 TEC units. Results are also presented that illustrate the suitability of the F7/C2 GPS absolute TEC observations for studying the climatology and variability of the topside ionosphere and plasmasphere (i.e., altitudes above the F7/C2 orbit of similar to 550 km). These results demonstrate that F7/C2 provides high quality GPS absolute TEC observations that can be used for ionosphere-thermosphere data assimilation as well as scientific studies of the topside ionosphere and plasmasphere.

引用

页数：15

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