resampled variances/weights #30
Description
In the SWarp manual, it says that resampled variances are squared-kernel-weighted sum of the input variances in the kernel footprints.
However, in the interpolate_pix function, SWarp takes the maximum variance as the resampled variance. The implementation in the manual makes more sense to me, because resampled data pixels are kernel-weighted sum of the input pixels within the kernel footprint.