| tile | A 1.49 deg radius circle on the sky determined by
tiling and which contains the locations of up to
592 tilable targets and other science targets.
This circle will become the plates into which fibers are plugged to observe
spectra. For each tile one or more plates will be
created. Only the part of the Tile that is within the union of the
TilingBoundaries for the
TileRun and outside the union of the TilingMasks
for the TileRun and the global TilingMasks may
actually have targets. If less than the maximum of 592 tilable targets can be
assigned to that tile, the spare fibers are assigned to other spectroscopic
targets. The 48 remaining fibers will be assigned to
calibration targets.
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