fact.coordinates

Interface CelestialCoordinate

All Superinterfaces:

Serializable

All Known Implementing Classes:

EquatorialCoordinate, HorizontalCoordinate

public interface CelestialCoordinate
extends Serializable

Created by maxnoe on 23.05.17.

Interface for celestial coordinates. Provides the greatCircleDistance and the conversion from ZonedDateTime to Greenwich Sidereal Time

Field Summary

Fields

Modifier and Type	Field and Description
static ZonedDateTime	gstReferenceDateTime

Method Summary

Modifier and Type	Method and Description
static double	datetimeToGST(ZonedDateTime datetime) Convert a DateTime object to Greenwich Sidereal Time according to https://en.wikipedia.org/wiki/Sidereal_time#Definition
static double	greatCircleDistanceDeg(double lat1, double lon1, double lat2, double lon2)
static double	greatCircleDistanceRad(double lat1, double lon1, double lat2, double lon2) Great circle distance using the more complicated but numerically more stable version of wikipedia (special case of the Vincenty formula) https://en.wikipedia.org/wiki/Great-circle_distance

Field Detail

gstReferenceDateTime

static final ZonedDateTime gstReferenceDateTime

Method Detail

greatCircleDistanceRad

static double greatCircleDistanceRad(double lat1,
                                     double lon1,
                                     double lat2,
                                     double lon2)

Great circle distance using the more complicated but numerically more stable version of wikipedia (special case of the Vincenty formula) https://en.wikipedia.org/wiki/Great-circle_distance

Parameters:

lat1 - Latitude of first point

lon1 - Longitude of first point

lat2 - Latitude of second point

lon2 - Longitude of second point

Returns:

Great circle distance between the two points

greatCircleDistanceDeg

static double greatCircleDistanceDeg(double lat1,
                                     double lon1,
                                     double lat2,
                                     double lon2)

datetimeToGST

static double datetimeToGST(ZonedDateTime datetime)

Convert a DateTime object to Greenwich Sidereal Time according to https://en.wikipedia.org/wiki/Sidereal_time#Definition

Parameters:

datetime -

Returns:

gst in radians