Changeset 1400 for trunk/doc/pslib/psLibSDRS.tex

Timestamp:

Aug 6, 2004, 9:06:36 AM (22 years ago)

Author:

eugene

Message:

minor mods

File:

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

trunk/doc/pslib/psLibSDRS.tex

@@ -1 @@
-%%% $Id: psLibSDRS.tex,v 1.61 2004-07-13 21:42:55 eugene Exp $
+%%% $Id: psLibSDRS.tex,v 1.62 2004-08-06 19:06:36 eugene Exp $
 \documentclass[panstarrs,spec]{panstarrs}
 
@@ -2661 +2661 @@
 We require a collection of functions to manipulate time data.  These
 operations primarily consist of conversions between specific time
-formats.  PSLib wraps the libTAI structure \code{taia} for use as the
-native time format.  
+formats.  PSLib currently uses the UNIX \code{timeval} structure
+representation of time as the native time format.
 \begin{verbatim}
 typedef struct {
-  struct taia t;
+  time_t         tv_sec;   /* seconds */
+  suseconds_t    tv_usec;  /* microseconds */
 } psTime;
 \end{verbatim}
 
-Two utility functions provide the current time in two formats, MJD
-(modified Julian day) and the Sidereal time.  
-
-\begin{verbatim}
-psTime psGetMJD(void);
-psTime psGetSidereal(float mjd, float longitude);
+A utility function provides the current time from the system clock, in correct TAI units:
+\begin{verbatim}
+psTime psTimeGetTime (void);
 \end{verbatim}
 
@@ -2698 +2696 @@
 psTime *psTimevalToTime (struct timeval *input);
 psTime *psTMtoTime (struct tm *input);
+\end{verbatim}
+
+\begin{verbatim}
+double psMJDToSidereal (double MJD, double longitude);
+double psSiderealToMJD (double sidereal, double longitude);
 \end{verbatim}