[DM-3040] KPM Measurement: Residual PSF Ellipticity Correlations (TE1), FY15 - Jira

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This will be measured on precursor data (almost certainly from HSC, via ~~DM-2380~~) using the following procedure:

Run visit-level processing (i.e. ProcessCcdTask, probably via the new HSC driver ported on ~~DM-3368~~).
Compute the residual ellipticity correlation function separately in each visit. Bob Armstrong has code we can probably use for this (and will be at LSST2015 to help). The stile project (https://github.com/msimet/Stile) may be another solution (and perhaps a better long-term one).
Compute the median correlation function (at separation bins) over multiple visits.

This will be done in whichever of r or i band has better public HSC data.

The same measurement procedure will be used for TE2 (~~DLP-308~~) in S15 (~~DM-3047~~).

is blocked by

DM-3895 Provide values for PSF ellipticity KPMs in FY15

is contained by

DM-23539 Incorporate Rowe statistics

relates to

DM-8951 Add TE1 and TE2 KPMs to validate_drp using code developed in DM-3040

DLP-290 Residual PSF Ellipticity Correlations: TE1

(1 mentioned in)