* In each spectrum, <= 2 missing channels are filled by linear interpolation. In each spatial
plane, single missing pixels are filled by linear interpolation, first in l direction, then b.
Two moment masked cubes are provided, one covering the smaller area with uniform
beamwidth sampling and the other covering the whole area with 1/4° sampling.
Owing to the high latitude of this survey, the longitude spacing of the observations is 0.1429°, slightly larger than our
normal "beamwidth" spacing of 0.125°. For incorporation into the whole-Galaxy cubes presented elsewhere in the archive,
the Polaris spectra were interpolated onto a standard beamwidth spaced grid.
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