org.das2.datum

Class LeapSecondsConverter

java.lang.Object

org.das2.datum.UnitsConverter

org.das2.datum.LeapSecondsConverter

public class LeapSecondsConverter
extends UnitsConverter

TT2000 converter that takes leap seconds into account from us2000.

Nested Class Summary

Nested classes/interfaces inherited from class org.das2.datum.UnitsConverter

UnitsConverter.Appended, UnitsConverter.ScaleOffset

Field Summary

Fields

Modifier and Type	Field and Description
static int	T1972_LEAP

Fields inherited from class org.das2.datum.UnitsConverter

CENTI, GIGA, IDENTITY, inverse, KILO, LOOSE_IDENTITY, MEGA, MICRO, MILLI, NANO, PICO, TERA

Constructor Summary

Constructors

Constructor and Description
LeapSecondsConverter(boolean us2000ToTT2000)

Method Summary

Modifier and Type	Method and Description
double	convert(double value) convert the value in the source units to the target units.
UnitsConverter	getInverse()
static int	getLeapSecondCountForTT2000(long tt2000) calculate the number of leap seconds in the tt2000 time.
static int	getLeapSecondCountForUs2000(double us2000) calculate the number of leap seconds in the us2000 time.

Methods inherited from class org.das2.datum.UnitsConverter

append, convert, getConverter

Methods inherited from class java.lang.Object

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

Field Detail

T1972_LEAP

public static final int T1972_LEAP

See Also:

Constant Field Values

Constructor Detail

LeapSecondsConverter

public LeapSecondsConverter(boolean us2000ToTT2000)

Method Detail

getLeapSecondCountForUs2000

public static int getLeapSecondCountForUs2000(double us2000)
                                       throws java.io.IOException

calculate the number of leap seconds in the us2000 time. For example,

 
 print getLeapSecondCountForUs2000( Units.us2000.parse('1972-01-01T00:00Z').doubleValue(Units.us2000) ) # results in 10
 print getLeapSecondCountForUs2000( Units.us2000.parse('2017-01-01T00:00Z').doubleValue(Units.us2000) ) # results in 37
 
 

This is intended to replicate the table https://cdf.gsfc.nasa.gov/html/CDFLeapSeconds.txt

Parameters:

us2000 - the time in us2000, which include the leap seconds.

Returns:

the number of leap seconds for the time.

Throws:

java.io.IOException

getLeapSecondCountForTT2000

public static int getLeapSecondCountForTT2000(long tt2000)
                                       throws java.io.IOException

calculate the number of leap seconds in the tt2000 time. For example,

 
 print getLeapSecondCountForTT2000( Units.cdfTT2000.parse('1972-01-01T00:00Z').doubleValue(Units.cdfTT2000) ) # results in 10
 print getLeapSecondCountForTT2000( 0 )   # results in 32
 print getLeapSecondCountForTT2000( Units.cdfTT2000.parse('2017-01-01T00:00Z').doubleValue(Units.cdfTT2000) ) # results in 37
 
 

This is intended to replicate the table https://cdf.gsfc.nasa.gov/html/CDFLeapSeconds.txt

Parameters:

tt2000 - the time in tt2000, which include the leap seconds.

Returns:

the number of leap seconds for the time.

Throws:

java.io.IOException

getInverse

public UnitsConverter getInverse()

Specified by:

getInverse in class UnitsConverter

convert

public double convert(double value)

Description copied from class: UnitsConverter

convert the value in the source units to the target units.

Specified by:

convert in class UnitsConverter

Parameters:

value - value in source units.

Returns:

value in target units.