W2 first latent model
updated W1 PSF including polynomial coefficients up to fifth order
updated W2 PSF including polynomial coefficients up to fifth order
handle higher order W1/W2 coefficients if they are present in PSF model
generalizd to handle W2, now handles all four bands
properly handle W2 first latent
default to updated v1 W1/W2 PSF coefficients, properly handle W2 first latent
brief explanation of updated W1, W2 PSF coefficients