Versions in this module Expand all Collapse all v0 v0.1.0 Jul 25, 2026 Changes in this version + const ApparentHorizon + const CivilTwilight + type CrossingState string + const AlwaysAbove + const AlwaysBelow + const Crosses + type Window struct + AltitudeDegrees float64 + ApproximateNoon time.Time + DateUTC time.Time + End time.Time + Latitude float64 + Longitude float64 + Start time.Time + State CrossingState + func Calculate(date time.Time, latitude, longitude, altitudeDegrees float64) (Window, error)