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<H2><A NAME="SECTION00021000000000000000">
Purpose</A>
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SLALIB<A NAME="tex2html1" HREF="footnode.html#412"><SUP><IMG ALIGN="BOTTOM" BORDER="1" ALT="[*]" SRC="foot_motif.gif"></SUP></A>
is a library of routines
intended to make accurate and reliable positional-astronomy
applications easier to write.
Most SLALIB routines are concerned with astronomical position and time, but a
number have wider trigonometrical, numerical or general applications.
The applications ASTROM, COCO, RV and TPOINT
all make extensive use of the SLALIB
routines, as do a number of telescope control systems around the world.
The SLALIB versions currently in service are written in
Fortran 77 and run on VAX/VMS, several Unix platforms and PC.
A generic ANSI C version is also available from the author; it is
functionally similar to the Fortran version upon which the present
document concentrates.
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<ADDRESS>
<I>SLALIB --- Positional Astronomy Library<BR>Starlink User Note 67<BR>P. T. Wallace<BR>12 October 1999<BR>E-mail:ptw@star.rl.ac.uk</I>
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