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An empirical model of L-band scintillation S4 index constructed by using FORMOSAT-3/COSMIC data

2017; Elsevier BV; Volume: 60; Issue: 5 Linguagem: Inglês

10.1016/j.asr.2017.05.031

1879-1948

Shih‐Ping Chen, D. Bilitza, Jann‐Yenq Liu, R. G. Caton, Loren C. Chang, Wen‐Hao Yeh,

Geophysics and Gravity Measurements

Modern society relies heavily on the Global Navigation Satellite System (GNSS) technology for applications such as satellite communication, navigation, and positioning on the ground and/or aviation in the troposphere/stratosphere. However, ionospheric scintillations can severely impact GNSS systems and their related applications. In this study, a global empirical ionospheric scintillation model is constructed with S4-index data obtained by the FORMOSAT-3/COSMIC (F3/C) satellites during 2007–2014 (hereafter referred to as the F3CGS4 model). This model describes the S4-index as a function of local time, day of year, dip-latitude, and solar activity using the index PF10.7. The model reproduces the F3/C S4-index observations well, and yields good agreement with ground-based reception of satellite signals. This confirms that the constructed model can be used to forecast global L-band scintillations on the ground and in the near surface atmosphere.