Online computing software by Jenik Hollan

(see more info at the bottom)

Name	Last modified	Size	Description

Parent Directory		-
CAYwuHOAfYInKfAeG	29-Feb-2012 09:40	6.2K
Map_BSC.hlp	02-Dec-2010 12:43	14K
SunDial.hlp	17-Feb-2005 20:20	5.3K
hordial.pdf	15-Mar-2010 18:17	229K	horizontal sundial
ies_eld_view/	26-Oct-2010 23:12	-
images/	11-Jan-2006 19:45	-
insolation.php	17-Feb-2005 21:25	3.6K	daily solar gains
lum.php	21-Jun-2002 21:26	4.3K	luminance units conv.
lun_illum.cz.php	17-Feb-2005 11:11	4.6K	symlink to *.phtml
lun_illum.cz.phtml	17-Feb-2005 11:11	4.6K	Osvetlenost mesicem
lun_illum.php	17-Feb-2005 11:11	5.2K	Planetary ephemeris
map.eps	17-May-2012 00:36	24K	the last map, PS form
map.php	23-Jun-2005 17:07	5.1K	makes a stellar chart
map.png	17-May-2012 00:37	11K
maps/	24-Oct-2011 16:18	-	old and new star maps
nights.php	17-Jan-2009 20:33	4.6K	symlink to *.phtml
nights.phtml	17-Jan-2009 20:33	4.6K	beg./end of the night
obj.dbf	04-Jun-2002 22:27	87K	deep-sky objects list
objb.dbf	01-Nov-2010 10:15	87K
other/	10-Mar-2006 22:12	-
padi.php	19-Jan-2007 19:55	4.7K	mutual star positions
pascal_sources/	26-Oct-2010 22:53	-
results/	15-Jul-2010 16:36	-
star_pos.php	17-Aug-2005 18:24	3.8K	Star positions and AM
sundials/	14-Sep-2006 20:53	-
tr_bin_t.php	21-Feb-2006 21:17	2.0K	orbit of a binary
vRdcDtPcCUyEOxNGyb	12-Mar-2012 21:30	1.4K

Computation of lighting-relevant values

Some programmes useful for lighting evaluation purposes

will eventually be placed in this directory. At present, there are just

lun_illum.php for computation of direct moonlight anywhere anytime (the source script is this one; thanks to Rudolf Novak for giving me the advice),
nights.php for computation of the length of the night (the source script is this one),
lum.php for conversion of SI luminance units to some queer astronomical ones (the source script is this one),
insolation.php for computation of sundials or of clear-sky solar gains through windows etc. (the source script is this one),
star_pos.php for displaying the Bright Star Catalogue star data and computing azimuths, heights and airmasses (the source script is this one),
padi.php for displaying the Position Angle and Angular Distance of pairs of stars (the source script is this one),
tr_bin_t.php the same for binaries (a Czech-English hybrid),
and a powerful stellar chart programme map.php (the source script is this one).

An example of its output is mach.png, a map for the January 2005 comet Machholz, made by the map.php by writing
@mach.cnf np o wpmach.eps d5.1.2005 t20 ut0
on the command line and checking the box ``override'' (in fact, I've deleted most of the deep-sky objects from mach.eps and remade the png and pdf files). The times are UTC (comet positions as passing near Pleiades, each ``European'' evening).

(February and March comet positions produced similarly with a command line
@mach.cnf np o wpmap.eps ra15 de80 d8.2.2005 t20 ut0 $s2 $n30 m800
and less editing are the files mach2.*, e.g. mach2.png.)

jenik hollan, Jan 06, 2005

(my info on ‘light at night’ is at http://www.astro.cz/darksky)