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JWST mosaics may be used in NIRCam imaging and wide field slitless spectroscopy observations — its primary purpose is to cover areas larger than the 5.1' × 2.2' NIRCam field of view. The spatial extent of each tile with zero overlap is 5.115033' × 2.221150' (the horizontal and vertical extent of the NIRCam apertureALL). This spacing may be decreased (to make the pointings overlap, as is the default) or increased (to widen the gaps between pointings). By default, spacing is defined along NIRCam's ALL aperture axis, which is roughly aligned with the JWST (V2, V3) coordinate system and the NIRCam detector rows and columns.