The Generalized Spectral Kurtosis Estimator

Details The Generalized Spectral Kurtosis Estimator The Generalized Spectral Kurtosis Estimator

2010-05-24

arxiv.org/abs/1005.4371v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

5 pages, 2 figures, MNRAS Letters accepted

Scientific paper

Due to its conceptual simplicity and its proven effectiveness in real-time detection and removal of radio frequency interference (RFI) from radio astronomy data, the Spectral Kurtosis (SK) estimator is likely to become a standard tool of a new generation of radio telescopes. However, the SK estimator in its original form must be developed from instantaneous power spectral density (PSD) estimates, and hence cannot be employed as an RFI excision tool downstream of the data pipeline in existing instruments where any time averaging is performed. In this letter, we develop a generalized estimator with wider applicability for both instantaneous and averaged spectral data, which extends its practical use to a much larger pool of radio instruments.

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