Evaluation of NeQuick2 Model over Mid-Latitudes of Northern Hemisphere
نویسندگان
چکیده
NeQuick2 is a three-dimensional ionospheric electron density empirical model that uses numerical integration to calculate the total content along any line-of-sight (LOS). As one of most commonly used models, it necessary objectively evaluate accuracy and stability over long period, especially mid-latitudes northern hemisphere where ground-based GNSS stations are distributed. Therefore, different methods in this study from 2008 2021, including comparison with International Global Navigation Satellite System Ionosphere Maps (IGSG), Jason2 Vertical Electron (VTEC), self-consistent evaluation. The IGSG shows standard deviation (STD) value about 2.59 TECU. ocean regions bias more significant than model. mean STD 2.09 TECU for IGSG, corresponding 3.18 model, which 50% worse IGSG. dSTEC assessment results indicate variation stable 0.86 1.52 respectively. conclusion could be made represents average ionosphere its fluctuates solar conditions. Compared always underestimates TEC value, low activity periods compared Jason2, values obtained by overestimated, but degree overestimation smaller
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14164124