DeltaT (solarpositioning 0.1.6 API)

java.lang.Object

net.e175.klaus.solarpositioning.DeltaT

public final class DeltaT extends Object

Finding 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
clone, equals, finalize, 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 and time
  
  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)