Const
The span over which this engine's positions have been compared with an independent ephemeris: from 1800-01-01T00:00Z up to, not including, 2200-01-01T00:00Z. Charts outside it are still computed, and carry the outside-reference-span flag.
outside-reference-span
The span over which this engine's positions have been compared with an independent ephemeris: from 1800-01-01T00:00Z up to, not including, 2200-01-01T00:00Z. Charts outside it are still computed, and carry the
outside-reference-spanflag.