Dave Robinson's blog

Astigmatic Filtering using Wavelets

This document describes some preliminary results obtained by using a Wavelet based noise removal technique to implement the astigmatic filtering briefly outlined in a previous blog. As before, the same synthetic Waterfall plot has been used to evaluate, and demonstrate the effectiveness of the methodology, which appears to be very good at removing the typical background noise present in the Waterfall diagrams.

Astigmatic Filtering improves Waterfall Signal to Noise Ratio

This document outlines some interesting results following a simple experiment I have undertaken in preparation for undertaking a much more elaborate experiment into applying the Donoho & Johnstone methodology for noise reduction using a 2D Wavelet decomposition of a Waterfall plot. It should be emphasized that the results shown here are NOT based on this technique, but are based purely on linear filtering, and were meant to be a preliminary test of the validity of my assumptions.

Radon Transform provides alternative to Waterfall Plots

by: Dave Robinson

date: 7th November, 2011

For information only

Please comment on the forum: http://setiquest.org/forum/topic/alternative-display-method-waterfall-plot

Low frequency analysis of the Crab Pulsar Data

by Dave Robinson

11th October 2011

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