NICMOS GROT MASKS
Mask file Camera Use After Date NIC1 Grot Mask (8/97 - 11/97) 1 Use for data taken from 8/97 to 11/97 NIC1 Grot Mask (12/97 - 1/99) 1 Use for data taken from 12/97 to 1/99 NIC2 Grot Mask 2 Use for all NIC2 data NIC3 Grot Mask 3 Use for all NIC3 data