def __init__(self): self.ims = ImagesQuery() self.disc = DiscoveriesQuery() self.bk = BlockQuery() # pixel scale is symmetric, 0.1850 arcsec/pixel. Dectector is [1:23219,1:19354] pixels. self.field_area = ((0.185 * 23219) / 3600.) * ( (0.185 * 19354) / 3600.) # sq. deg