Changeset 1619

Timestamp:

Aug 24, 2004, 6:37:48 PM (22 years ago)

Author:

Paul Price

Message:

Added psTimeLeapSeconds, removed psTimeFromLST, changed output of
psTimeToLST to psF64.

File:

• trunk/doc/pslib/psLibSDRS.tex (modified) (3 diffs)

trunk/doc/pslib/psLibSDRS.tex

@@ -1 @@
-%%% $Id: psLibSDRS.tex,v 1.84 2004-08-24 20:01:50 price Exp $
+%%% $Id: psLibSDRS.tex,v 1.85 2004-08-25 04:37:48 price Exp $
 \documentclass[panstarrs,spec]{panstarrs}
 
@@ -3080 +3080 @@
 and returned.
 
-To convert to or from Local Mean Sidereal Time, it is necessary to
-provide the local longitude as well:
-%
-\begin{verbatim}
-psTime *psTimeToLST(psTime *time, double longitude);
-psTime *psTimeFromLST(psTime *time, double longitude);
+To convert to Local Mean Sidereal Time, it is necessary to provide the
+local longitude (specified in radians, positive East of Greenwich) as
+well:
+%
+\begin{verbatim}
+psF64 *psTimeToLST(psTime *time, psF64 longitude);
 \end{verbatim}
 %
@@ -3097 +3097 @@
 double psTimeGetUT1Delta(const psTime *time);
 psSphere *psTimeGetPoleCoords(const psTime *time);
+\end{verbatim}
+
+Leap seconds are added to UTC in order to keep it within 0.9s of UT1
+(which is defined relative to the Earth's rotation, and hence is
+useful for astronomical purposes).  The following function,
+\code{psTimeLeapSeconds}, shall calculate the number of leap seconds
+added between two times:
+%
+\begin{verbatim}
+long psTimeLeapSeconds(const psTime *time1, const psTime *time2);
 \end{verbatim}