Robust estimation of interplanetary scintillation
Open Access
- 15 January 1992
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 254 (2) , 273-276
- https://doi.org/10.1093/mnras/254.2.273
Abstract
Interplanetary scintillation (IPS) is a random process, so measurements of its power are affected by self-noise. The noise process is therefore non-stationary whenever the mean IPS power changes, such as when performing drift scans across a radio source. Here I present a new estimator for IPS which takes proper account of the noise statistics, and show it to perform significantly better than a simple ‘matched’ filter. The probabilistic basis of this estimator also makes it a powerful discriminator against interference, capable of delivering good estimates of scintillating power even when many of the data are badly corrupted.Keywords
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