SLA_CALDJ - Calendar Date to MJD

From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node28.html | 128 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 src/slalib/sun67.htx/node28.html (limited to 'src/slalib/sun67.htx/node28.html') diff --git a/src/slalib/sun67.htx/node28.html b/src/slalib/sun67.htx/node28.html new file mode 100644 index 0000000..33bc93d --- /dev/null +++ b/src/slalib/sun67.htx/node28.html @@ -0,0 +1,128 @@ + + + + +SLA_CALDJ - Calendar Date to MJD + + + + + + + + + + + + +

+ +

+
+ Next: SLA_CALYD - Calendar to Year, Day +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_CAF2R - Deg,Arcmin,Arcsec to Radians +

SLA_CALDJ - Calendar Date to MJD + +

ACTION: +: Gregorian Calendar to Modified Julian Date, with century default. +
CALL: +: CALL sla_CALDJ (IY, IM, ID, DJM, J) +

GIVEN: +

+
+ + + + + +

IY,IM,ID	I	year, month, day in Gregorian calendar

RETURNED: +

+
+ + + + + + + + + + + + + + + + + + + + + + + + + +

DJM	D	modified Julian Date (JD-2400000.5) for $0^{\rm h}$
J	I	status:
		0 = OK
		1 = bad year (MJD not computed)
		2 = bad month (MJD not computed)
		3 = bad day (MJD computed)

NOTES: +

1. +

This routine supports the century default feature. +Acceptable years are: +

00-49, interpreted as 2000-2049, +
50-99, interpreted as 1950-1999, and +
100 upwards, interpreted literally. +

+ For 1-100AD use the routine sla_CLDJ instead. +

2. +

For year nBC use IY = -(n-1). +

3. +

When an invalid year or month is supplied (status J = 1 or 2) + the MJD is not computed. When an invalid day is supplied + (status J = 3) the MJD is computed. +

+ +

+
+ Next: SLA_CALYD - Calendar to Year, Day +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_CAF2R - Deg,Arcmin,Arcsec to Radians +

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +

+ + -- cgit