error in stefcal step for polarized calibration

[mweastwood]

@marinanderson You should probably double check my math, but I think I found an error in the stefcal step for polarized calibration here:

TTCal.jl/src/calibration.jl

Line 300 in b9ed76a

step[j] = ifelse(ok, (denominator\numerator)' - input[j], zero(T))

I think the update step actually needs to be conj(denominator\numerator) instead of (denominator\numerator)' (which does a conjugate transpose).

[mweastwood]

Eh, now I'm not so sure. All the tests break if I make this change. Maybe it is ok after all?

[mweastwood]

TTCal.jl/src/getspec.jl

Line 48 in baf7bc7

xy = complex(real(visibilities.data[α,β].xy*fringe), -imag(visibilities.data[α,β].yx*fringe))

The above line is incorrect. Fixed on the devel branch.