Initial Despiking

Let us now remove the worst spikes by using the SURF task scuclip to take out any spikes exceeding 5 sigma.

% scuclip
IN - Name of input file containing demodulated map data 
/@i86_lon_sky/ > 
SURF: run 86 was a MAP observation with JIGGLE sampling of object 
IRC+10216
OUT - Name of output file /'i86_lon_clip'/ > 
NSIGMA - How many sigma to despike bolometers /5/ > 
SURF: Removed 3 spikes

scuclip removed 3 spikes in the data, which will do for the moment.

Following despiking and sky removal one can then run rebin. The process of sky removal will significantly improve any maps which have a `tiled' pattern due to varying sky emission between the two switch positions. Below we discuss in more detail how to most efficiently remove sky noise, which depends on what data sets we have.