JD2MJD
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Contents: Description, Arguments, Usage, Examples, Related Functions, Source Supported Under Version: > 1.14
Description Converts Julian Date to Modified Julian Date
Arguments and Return Values Parameters: Numeric array specifying the Julian date Return Value: A double-format numeric array with the same organization as the inputs
Usage Syntax: JD2MJD(JD) The Julian Date is a continuous count of days since noon UTC on January 1, 4713 BCE in the proleptic Julian calendar. The Modified Julian Date is a continuous count of days since midnight UTC at the beginning of November 17, 1858 (in the Gregorian calendar). An offset of 2400000.5 is the only difference between the two. This function just subtracts that offset. When JD2MJD() is entered without any arguments, it prints its description, as shown below.
Examples dv> JD2MJD() Convert Julian Date to Modified Julian Date Works for array inputs JD2MJD(JD) returns the Modified Julian Date. Returns double-precision Modified Julian Date S.Marshall 06-28-2008 0 dv> JD2MJD(2400000.5) 0.00000000000000 dv> JD2MJD(2400001) 0.500000000000000 dv> JD2MJD(0) -2400000.50000000 dv> JD(clock(1)) 2455181.35159387 dv> a = clock(1) 7x1x1 array of double, bsq format [56 bytes] 2009.00000000000 12.0000000000000 15.0000000000000 13.0000000000000 26.0000000000000 30.3284120000000 -7.0000000000000 dv> JD(a) 2455181.35173991 dv> MJD(a) 55180.8517399122 dv> JD2MJD(JD(a)) 55180.8517399123 |
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Recent Library Changes Created On: 11-18-2009 |
