Jacknifes Are the Acid Test


Construct 2 maps from subsets of data:
Which should have identical true signal content (cover same area of sky)
Which can be expected to have very different false signal content
We are using:
Split Day (halves of each day, different az angle range and los rotation)
Forward/backward scans
Split season
Split focal plane (sets of pixels)
Frequency (100GHz - 150GHz)
Take power spectrum of difference map and calc chisq
Compare to sim distribution