Transmission for the nulling interferometric mode used in this study. Upper: transmission pattern in polar coordinates at 10 μm of the nulling interferometric configuration used in this study. A comet at a separation of 40 mas would project along the black dashed line as the telescope array rotates. Lower: a cross section of the transmission pattern for a separation of 40 mas (i.e., along the dashed line in the upper panel). A comet residing at a position angle of 0 deg would map the transmission pattern of the black solid line. A comet at a different PA would result in a cyclically phase-shifted pattern of otherwise the same shape. See Dannert et al. (2022) for further details.