Jul 17th 2007
	Sunrise/sunset lines are now displayed correctly for
	those hours, when the Sun is above horizon and the dial
	at least once per year.
	An error in shc.php script, preventing small timesteps
	for sunah, was corrected.
	The 1:1 EPS file for a cutting plotter did not work,
	the shc_eps.awk script had to be updated due to a slight
	change of format produced by Gnuplot 4.0.
	Several files were renamed and a new version was installed
	on mail.astrohk.cz (alias astrohk) web server.

Sep 12th 2006
	An error in sunah.f/a.f, which caused ecliptic longitude
	and hour angle to be wrong, was corrected.

Sep 1st 2006
	sh1.f was renamed to shcnox.f.

Jul 8th 2005
	Temporal lines are wrong. They should NOT be straight...

Jul 8th 2005
	From now on the time in hodin_prumet.dat and hodin_rysky.dat
	is NOT UT, but the same as in output figures (i.e. either
	PMSC, letni, SEC, SELC).

May 25th 2005
	azed.pl script now outputs angles with 3 decimal digits.

May 13th 2005
	$lambda and $phi variables were errorneously exchanged
	in shc.php script (wrt. sunah calculation).

Jan 25th 2005
	All gnuplot labels are now plotted in front of the lines.

Jan 17th 2005
	Shc.php script can be now safely executed multiple times.

Jan 16th 2005
	The correction performed at Nov 23rd 2004 did NOT work until
	today. X11 terminal is too slow in enhanced mode - I switched
	it off in sh_x11.plt. Binary file gnuplot_x11 is also necessary
	to include if gnuplot is not installed on a target system.
	Some "extreme" hour lines were not properly extented towards
	the polos base.

Jan 12th 2005
	Azimuth lines are now correcly labelled and they can be plotted
	also above the horizon line. A 3-dimensional figure of the
	sundials can be plotted using scripts in tmp/3d/ directory.
	Luxi font is used in both PS and PNG figures. Both Linux and
	Windows version produce now very similar figures. Slightly
	improved documentation.

Jan 2nd 2005
	A minor improvement of the PHP script (exchanged misleading
	$lambda and $phi variables) and documentation (one figure
	explaining the position of the polos), new PDF figures of the
	dial, automatic refresh of PNG figures, new colors in PNG's,
	an english legend, Gnuplot version 4.0.0 and corresponding
	changes (e.g. ? mark at the end of empty data files, improved
	PLT scripts, larger output figures).

Nov 23rd 2004
	A correction of stredni_slunce_ah subroutine, where sidereal
	should be computed from right ascension, not ecliptic longitude.
	(This only sligthly affected date curves - their day-time
	coordinate, i.e. the 1st column in datum.dat file, was shifted.)

Jul 25th 2004
	A graphical interface for sunah program and correspondingly
	modified documentation. Small changes in RPM spec file.

Jun 19th 2004
	Substantially improved documentation, checking of the input
	in sunah, compilation and test in WinXP, minor corrections
	in shc.tcl, azed.pl.

Apr 16th 2003
	Two new dials were added: azimuth and height measure.

Apr 7th 2003
	Another minor spelling corrections in shc.dat file.

Jan 30th 2003
	A new title image. SHC was incorporated into CD-ROM version
	of Sundials in the Czech republic and Slovakia catalogue.

Jan 21st 2003
	Resorted shc.dat file according to proper Czech collating rules.
	Hypertext links to the catalogue of sundials were corrected.

Dec 21st 2002
	Minor spelling correction in shc.dat file.

Oct 15th 2002
	Extended Czech README and doc/. Sunah program asks questions
	on input parameters.

Oct 13th 2002
	Corrected plotting of hour lines (sometimes they were missing!)
	and their extension. The unreal lines below horizon could be
	plotted. WWW version (shc.php) is multi-language.

Oct 2st 2002
	SHC is able to draw analemmas along the hour lines and date lines
	for integer durations of the day. Sunah program outputs also hour
	angle and declination of the Sun.

Sep 25th 2002
	EPS 1:1 figure was changed due to plotter - the lines were outlined.
	Slight change in format of *.shc files (now it is the same as sh.in).

Sep 22nd 2002
	Script azed.pl was added (it processes measurements of the wall
	azimuth with sunah program).

Sep 15th 2002
	Corrected divisions by zeros in sh1.f (the code now runs even
	with range checking). An EPS image of the dial in 1:1 scale and
	a multipage (A4) PostScript document for easy printing is now
	available.

Sep 10th 2002
	Windows version is now freewrapped executable shc.exe (with correct
	accents) and self-extracting ZIP file.

Sep 6th 2002
	The first debugged version of SHC. It already includes the dial
	with time elapsed from sunrise and sunset.

