Module net.e175.klaus.solarpositioning

Package net.e175.klaus.solarpositioning

Class DeltaT

java.lang.Object

net.e175.klaus.solarpositioning.DeltaT

public final class DeltaT
extends Object

Estimate values for Delta T, the difference between Terrestrial Time (TT) and Universal Time (UT1).

Method Summary

Modifier and Type	Method	Description
static double	estimate(double year)	Estimate Delta T for the given decimal year.
static double	estimate(LocalDate forDate)	Estimate Delta T for the given date.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

estimate

public static double estimate(LocalDate forDate)

Estimate Delta T for the given date. This is based on Espenak and Meeus, "Five Millennium Canon of Solar Eclipses: -1999 to +3000" (NASA/TP-2006-214141) and updated by Espenak in 2014 at Eclipsewise.

Parameters:

forDate - date

Returns:

estimated delta T value (seconds)

estimate

public static double estimate(double year)

Estimate Delta T for the given decimal year.

Parameters:

year - decimal year (e.g. 2024.5 for the middle of 2024)

Returns:

estimated delta T value (seconds)

See Also:

• decimalYear(LocalDate)