Effect of data gaps: comparison of different spectral analysis methods

Munteanu, Costel; Negrea, Catalin; Echim, Marius; Mursula, Kalevi

doi:https://doi.org/10.5194/angeo-34-437-2016

Articles | Volume 34, issue 4

https://doi.org/10.5194/angeo-34-437-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/angeo-34-437-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 34, issue 4

Regular paper

|

19 Apr 2016

Regular paper |

| 19 Apr 2016

Effect of data gaps: comparison of different spectral analysis methods

Costel Munteanu, Catalin Negrea, Marius Echim, and Kalevi Mursula

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Short summary

We investigate the effect of data gaps for various methods of estimating the amplitude spectrum of a time series. We probe the effects of a single data gap of varying size and of numerous small gaps distributed within the time series. We use synthetic data sets and magnetic field measurements from the Venus Express spacecraft. For multiple gaps and turbulent magnetic data, we show that some advanced methods overestimate the high frequencies, while FFT slightly underestimates them.