Changes between Version 4 and Version 5 of Notes/ExampleReduction

Timestamp:

03/25/09 15:50:53 (15 years ago)

Author:

JamieStevens

Comment:

--

Notes/ExampleReduction

@@ -35 +35 @@
 There is some obvious narrowband interference present in the data. With CABB's polyphase filter design, the channels
 are designed to be very sharp-edged, so most interference will be present only in one channel, even if it is very strong.
+This should allow us to very effectively excise this RFI with an automated routine. 
+
+One option is to use Pieflag, Enno Middleberg's automatic flagging script. It works by looking at each channel in turn
+through time, and finding outliers in comparison to a channel that is known not to have RFI. This works quite well for
+continuum datasets from the old correlator, since there are fewer channels. Pieflag loads the
+entire dataset into memory, which can be quite a strain on a computer that does not have enough memory for the datasets
+that CABB will produce.
+
+Another option is to use a script made by Jamie Stevens to look for narrowband RFI (which is attached to this page).
+This script looks for individual channels that deviate from the median by more than an acceptable amount.