Indices of ionospheric GPS phase fluctuation derived by using Hilbert-Huang Transform

Details Indices of ionospheric GPS phase fluctuation derived by using Hilbert-Huang Transform Indices of ionospheric GPS phase fluctuation derived by using Hilbert-Huang Transform

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa53b1584s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA53B-1584

Computer Science

Performance

2439 Ionospheric Irregularities, 6974 Signal Processing (0674)

Scientific paper

Variations in phase and amplitude of the GPS signal have been used to monitor irregularities of the ionospheric electron density. Based on the Fourier analysis, fluctuations in the total electron content (TEC) recorded by ground-based GPS receivers have been derived the indices of Fp and fp to stand for the hourly and quarterly GPS phase fluctuations. However, it has been well known the ionospheric GPS phase fluctuation to be a non-stationary and nonlinear phenomenon. Therefore, base on the intrinsic and adaptive characters of Hilbert-Huang transform (HHT), we develop a new detrained procedure computing the indices of GPS phase fluctuation. Results confirm that the two indices derived by the HHT yield a better performance.

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