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/node94.html | 110 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 src/slalib/sun67.htx/node94.html (limited to 'src/slalib/sun67.htx/node94.html') diff --git a/src/slalib/sun67.htx/node94.html b/src/slalib/sun67.htx/node94.html new file mode 100644 index 0000000..e71fda8 --- /dev/null +++ b/src/slalib/sun67.htx/node94.html @@ -0,0 +1,110 @@ + + + + +SLA_EPCO - Convert Epoch to B or J + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_EPJ - MJD to Julian Epoch +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_EPB2D - Besselian Epoch to MJD +

+

+

SLA_EPCO - Convert Epoch to B or J +   +

+
+
ACTION: +
Convert an epoch to Besselian or Julian to match another one. +
CALL: +
D = sla_EPCO (K0, K, E) +

+

+
GIVEN: +
+
+ + + + + + + + + + + + + +
K0Cform of result: `B'=Besselian, `J'=Julian
KCform of given epoch: `B' or `J'
EDepoch
+

+
RETURNED: +
+
+ + + + + +
sla_EPCODthe given epoch converted as necessary
+

+
NOTES: +
+
1. +
The result is always either equal to or very close to +the given epoch E. The routine is required only in +applications where punctilious treatment of heterogeneous + mixtures of star positions is necessary. +
2. +
K0 and K are not validated. They are interpreted as follows: +
    +
  • If K0 and K are the same, the result is E. +
  • If K0 is `B' and K isn't, the conversion is J to B. +
  • In all other cases, the conversion is B to J. +
+
+ +next + +up + +previous +
+ Next: SLA_EPJ - MJD to Julian Epoch +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_EPB2D - Besselian Epoch to MJD +

+

+

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