

Map_mGSC <RA> <Decl.> [e# s# f{l|b|d}# m b# w[#]<output file> k# t# tr# p# n[#]
  X# Gr#
  @<file with these parameters> $@<orb.elements file> $<one_element>
  LM<MegaStar directories> (default
     C:\megastar\gsc;D:\megastar\gsc;E:\megastar\gsc;F:\megastar\gsc;G:\megastar\gsc;H:\megastar\gsc ;
     megastar\gsc is appended if you give a directory ending at \ )
  LE<directories with orbital elements and configuration files>
   (default c:\d\sol_syst;c:\d\j\d\sol_syst;c:\d\stars;c:\d\stars\atlas;/home/jhollan/public_html/data;/home/guest/cats;g:\cats)
  LV<directory with the GCVS (Gen. Cat. of Variable Stars)>
   (default C:\d\gcvs;c:\d\j\d\stars\gcvs;c:\d\stars\gcvs;g:\cats;f:\cats;/home/jhollan/public_html/data;/home/guest/cats)>

  - a star chart from the GSC MegaStar catalogue.

Its parameters are:  

equatorial coordinates - in degrees  or as <hh:mm:ss.cc> and <deg:':"">
    (they can be given labeled as well, as RA# and De#)
E#  equinox (epoch) of the given coordinates  (default 2000)
S#  height of the field (degrees, default 1 degree)
FL# faintness limit / 1 dmag (default 155) 
FB# base of the faintness scale / 1 dmag (default = 60)
FD# maximum faintness for writing the faintess (default = FB)
M   plots mirror-reversed - RA growing to the right
B#  starts at # per cent from the left side of the screen
W   writes the stars into a text file.
W#  makes a picture 1:HPGL (not working), 2:LaTeX, 3:PostScript
K#  0 rectangular grid (default), 1 equidistant, 2 gnomonic
R#  rotate # degrees clockwise (just for K>0)
Tr# multiple faintness by (default 1)
X#  plot a rectangle around center, # degrees high
XS# side along X coordinate / 1 % of the screen (default 100)
YS#       (the same for Y coordinate)
N[#] do not show more than # parameters (default 0, when present)
Gr# 2:Use just black and white for stars (instead of degrees of gray)
    5 to 100: % of the maximum white (default 60) for lines and texts

SVGA#    or
SVGA256:# Try SVGA 256-color mode # (default 4 for the 1024x768 resolution
                                3 would set the 800x600 mode)
SVGA16:# is a 16 color alternative for 0.5 MB cards
SVGA:#   is another 256-color alternative, if you have svga.bgi
  Caution, some cards lock up the computer so that just RESET helps.
  (For the Free Pascal Compiler, the SVGA option is obsolete
   as the executable uses some VESA mode in any case.)
P#  9 or 24 needle printer for hardcopy (now default = 1 : CS212 printer);
 Ctrl+Prin Screen or P makes then a hardcopy to "prn", any <Number> to a file
 named Map_mgsc.{prn|e9|e24} - the file is either changed, or created
 in a directory given by the TEMP environment variable. The screen is copied
 to that file as a picture No.<Number>. Then the whole file may be copied
 to printer Copy /b <name> prn.

Instead of       <RA> <Decl.>,      you may give
 <variable star name> <Const. short>     or
                   DB <ADS binary star number>
 (provided the corresponding catalogues are available in the needed form).

@   file with any default parameters (other than further @); default suffix
    is .cnf
$   prefix for elements concering comets etc. ($? to see help)
$@  file with orbital elements; defalut suffix is .elm

 (the usual parameters concerning time - D, T, UT and TT
  may be given without $ as well, for the first time)

( (C) Jan Hollan, N.Copernicus Observatory and Planetarium in Brno, 1999;
 subject to the GNU General Public License, http://www.gnu.org/copyleft;
 source code available at http://astro.sci.muni.cz/pub/hollan/programmes)

$@<File with orbital elements of an object>
should contain (and command-line parameters preceded by $ can change):

{ {A|Q}# AN# I# E# P{D<yy.mm.dd.ddd>|M#} P{N|L}#
 | !<string>[:<filename>] }

 !<string>[:<filename>] will read elements from the line containing <string>
   using text(!) file <filename> (default xephem.dat, mpc format is,
   an alternative, in this case >mpc< should be contained in the file name

 A is the large semiaxis
 AN longitude of ascending node
 I inclination
 E numerical excentricity (default 0)
 PD perihelion date
 PM perihelion Modified Julian Date
  (moment of perihelion passage can be replaced by:
  MA mean anomaly, AD that mean Anomaly Date and ev. DM daily mean motion)
 PL periheloin longitude (= PN + AN)
 PN elongation of perihelion from ascending node
 Q  perihelion distance from the Sun


and if needed, also moments and way to be shown :
 dDD[.MM[.YY]] tHH[.MM[.SS]] UT# B# N# S# M<symbol>
 UT is the t-UTC difference / 1 h (default 1 from Nov. to March, else 2)
 (the parameters concerning time and TT
  may be given without $ as well for initialization)

 B previous times to be computed (default 0)
 N next times to be computed (default 0)
 NT do not show times (and dates) by each position
 S step to further time (default 1 day)
 M string to be shown at each place (default +)

If more than one $@<file> is given on command line, only those parameters 
are valid for the current $@<file>, which are given before the following
$@<file>.

For a $@<file> given inside a @<file>, just the rest of the same line is sought
for occurence of any $<parameter>, not the whole @<file>.
