Use this calculator to calculate astronomic directions from Sunshots and Starshots.
Specifies the calculation types. Select one of the following from the type list:
Specifies the point ID for the station for which you want to calculate the direction.
Specifies the backsight point ID for the station for which you want to calculate the direction.
Specifies the Latitude of the station in the drawing's ambient settings format. Specify - for south.
Specifies the Longitude of the station in the drawing's ambient settings format. Specify - for west.
Specifies the UT1 time, which is determined by adding the correction (DUT) to the Coordinated Universal Time (UTC). UTC time is broadcast over WWV and other radio stations. You can also get DUT corrections via WWV; they are broadcast after the start of each minute.
Specifies the Greenwich Hour Angle (GHA) at zero (0) hours for the day on which the observations were made.
Specifies the GHA at 24 hours for the day the observations were made.
Specifies the declination at zero (0) hours on the day the observations were made.
Specifies the declination at 24 hours on the day the observations were made.
Specifies the semi-diameter of the sun.
Enter zero (0) if you are sighting either the center or both the trailing and leading edges of the sun. The left edge is always the leading edge at latitudes greater than 23.5 degrees north and greater than 23.5 degrees south. If only the left edge is being sighted (left when facing the sun), then the semi- diameter is positive; likewise, the semi-diameter is negative when only the right edge is sighted.
Creates a new observation set.
Deletes the selected observation set.
Displays each observation set.
Specifies the backsight orientation.
Specifies the sun or star observation.
Specifies the stop time for the observation.
Calculated observed direction.
Calculated average direction.
Value calculated by the editor.