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Table 2.

Specifications of the GMM sub-partitioning scheme.

Distance Max. HEALPix Max. sub Optimum
range (pc) level (overlap) partitions (a) ms
0–500 None (None) 1 1000
500–750 None (None) 1 1000
750–1500 5 (6) 9 800
1500–2500 6 (7) 36 600
2500–∞ 7 (8) 144 250

Notes.

(a)

When fewer than 10ms stars were in a sub-partition, the main HEALPix level was decreased by one to make the sub-partitions a factor of four larger.

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