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/node52.html | 115 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 src/slalib/sun67.htx/node52.html (limited to 'src/slalib/sun67.htx/node52.html') diff --git a/src/slalib/sun67.htx/node52.html b/src/slalib/sun67.htx/node52.html new file mode 100644 index 0000000..52cca63 --- /dev/null +++ b/src/slalib/sun67.htx/node52.html @@ -0,0 +1,115 @@ + + + + +SLA_DD2TF - Days to Hour,Min,Sec + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_DE2H - to Az,El +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DCS2C - Spherical to Cartesian +

+

+

SLA_DD2TF - Days to Hour,Min,Sec +   +

+
+
ACTION: +
Convert an interval in days into hours, minutes, seconds +(double precision). +

CALL: +
CALL sla_DD2TF (NDP, DAYS, SIGN, IHMSF) +

+

+
GIVEN: +
+
+ + + + + + + + + +
NDPInumber of decimal places of seconds
DAYSDinterval in days
+

+
RETURNED: +
+
+ + + + + + + + + +
SIGNC`+' or `-'
IHMSFI(4)hours, minutes, seconds, fraction
+

+
NOTES: +
+
1. +
NDP less than zero is interpreted as zero. +
2. +
The largest useful value for NDP is determined by the size +of DAYS, the format of DOUBLE PRECISION floating-point numbers + on the target machine, and the risk of overflowing IHMSF(4). + For example, on a VAX computer, for DAYS up to 1D0, the available + floating-point precision corresponds roughly to NDP=12. However, + the practical limit is NDP=9, set by the capacity of the 32-bit + integer IHMSF(4). +
3. +
The absolute value of DAYS may exceed 1D0. In cases where it + does not, it is up to the caller to test for and handle the + case where DAYS is very nearly 1D0 and rounds up to 24 hours, + by testing for IHMSF(1)=24 and setting IHMSF(1-4) to zero. +
+
+ +next + +up + +previous +
+ Next: SLA_DE2H - to Az,El +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DCS2C - Spherical to Cartesian +

+

+

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