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!readme
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Zipped Apps » StarChart |
| Filename: | !readme |
| Read OK: | ✔ |
| File size: | 2704 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
->!readme
StarChart
=========
This program is based on the comp.sources.unix program StarChart
written by;
Alan Paeth, University of Waterloo (AWPaeth@watCGL)
Petri Launiainen (pl@intrin.FI)
Jyrki Yli-Nokari (jty@intrin.FI)
Robert Tidd (inp@violet.berkeley.edu)
Craig Counterman (ccount@royal.mit.edu)
All credit for its operation should go to them.
Introduction
============
Using StarChart, you can produce star maps showing the position of many stars
and other objects as well as the planets. These starmaps are in the form of
Archimedes Draw files which means you can load them into !Draw for either
final editing or printing. They can also be dropped into most of the popular
DTP packages as illustrations.
Getting Started
===============
StarChart, requires access to certain Archimedes resources before it will work.
To put it simply, before you start StarChart, you must have opened a directory
viewer on both !System and !Fonts. StarChart will work with either the old font
manager or the new one. It does require the presence of the font Trinity.Medium
which you should have received with your RISC OS discs.
StarChart uses both the floating point emulator and the shared C library from
the !System folder.
If you run StarChart without making these resources available, it will complain
and give an error message.
One way of ensuring that things will work, is to make a copy of this disc and
then copy !System and !Fonts off your RISC OS discs onto it.
To run StarChart, open a directory viewer on the disc, and double click on
the !StarChart icon.
Windows
=======
Once you double click on !StarChart, three windows will appear. The first of
these, is a large white window in which star maps are draw ('the map window'),
the second is a smaller window titled 'StarChart' ('the controls window')
with a number of icons that allow you to control the star map that is draw.
The final wndow, appears behind the other two, but can be brought forward with
the mouse ('the planets window') again has a series of dialogue boxes which
allow you to set up the time for which the positions of the planets will be
displayed.
The general way you produce a star map, is to type the values for the section
of the sky you wish to display into the controls window, perhaps changing
the time in the planets window, and then click on the OK icon or type
RETURN. The star map is then draw in the map window. Clicking on the map
window with the middle mouse button, pops up a save box. You then drag the
file icon from this into a directory viewer and the star map is saved.
This file can be loaded at a later time into !Draw for printing or editing
or dropped into any of the usual Archimedes desk top publishing packages.
!Draw, can also be used to magnify maps to examine details.
When you have finished with !StarChart, closing the map window, will remove
the application from memory.
The Controls Window
===================
This has a number of icons that you can position the editing caret in by
clicking on them with the mouse pointer. Their purposes are as follows.
R.A.
====
This allows you to enter the Right Ascension of the centre of the Starchart.
RA can be in the range 0.00 to 24.00. Digits after the decimal point are
taken as minutes. Object positions can therefore be taken directly from a star
catalog.
Decl.
=====
Allows the declination of the centre of the starchart to be given.
N.S.
====
This controls the North/South range of the map in degrees of declination.
Title
=====
You can type in here, the Title you want to be written on your star map.
Mag. Limit
==========
Star limiting magnitude. This sets limits on the faintest stars displayed
on the ``master'' view.
Prt. Limit
==========
Label limiting magnitude. The new Yale database contains both a small set of
familiar names (for stars and special objects), plus an extensive list of
labels (Greek Bayer letter or Flamsteed numbers). Star names (including planet
names) always print for this small set. To avoid clutter, the labels may be
omitted below a cut-off magnitude by specifying this value.
Ann. Limit
==========
Greek/Flamsteed annotation magnitude. Labels printed for stars dimmer than
this value will use a Bayer or numerical label in favor of a proper name.
The default (2.05) includes nearly all well-known proper names including
Polaris, and excludes but a small number (such as Algol). Large values
generate charts full of obscure Arabian names, small (zero or negative) values
produce non-verbose charts, eg. ``a'', in Greek where possible, instead of
``Sirius''.
Search
======
You can type in here, a 3/4 character mnemonic for a constellation that
you want to display. This is a very easy way of using !StarChart.
The available constellations, are contained in the file !StarChart.con.locs.
This is a text file, which you can load into !Edit both to inspect or to
change. If a constellation is found, the values of RA, decl. and title
will be taken from the con.locs file.
Notice that this will overide any RA and decl. values you have set up.
Delete this entry to return to normal operation.
Some entries to try, are uma - Ursa Major, ple - Pleaides, cas - Cassiopea.
Finally, the controls window, has four switches that you can toggle on and
off by clicking on them.
These are.
Full Page
=========
This switch provides a single full-page of output, without a thumbnail-sized
finder chart. The legend placard is replaced with a single line banner giving
title, right ascension, declination and limiting magnitude. This mode is
useful for the construction of atlas pages. Because the page depicts the same
vertical scale in degrees of declination, the output will cover a slightly
reduced extent in right ascention.
Ann. Only
=========
This switch provides annotation-only (text) output: all stars and non-stellar
objects are omitted (including objects normally rendered by using alpha
characters). Borders and legends are left undisturbed. This feature is useful
in separating output detail, as when making (color) overhead transparencies.
Obj. Only
=========
This switch provides object-only output, and is the complement of the
above switch. When both switches appear together, all output is displayed.
This resembles the default case (neither switch), except in that case object
and annotation detail are written together. Here the software makes two
consecutive passes through all datasets and arranges output detail to be
written with all cosmic objects prefacing all related text annotations.
Ephem.
======
The file !StarChart.ephem.star containing ephemerides in the .star format,
will overlay the output. This is useful for generating constellation
boundaries, Milky Way isophots, and planet or satellite tracks. (The .star
format additionally includes records for vector and text annotation).
The Planets Window
==================
This window, allows you to set the time that will be used for calculating
the positions of the planets. It has a series of writeable icons for doing
this, whenver you start the program, they will be set from the real time clock.
The icons are as follows;
Time(hh.mm)
===========
The time in 09.30 format i.e. hours and minutes.
Month(mm)
The month in numeric form i.e. 09==September.
Day(dd)
=======
Day of the month 1-31.
Year
====
Current year in 1989 format.
GMT+(hh)
========
Hours west of GMT of the observer. The number of hours West of GMT that your
time zone is.
When return is pressed after entering any of these values, the bottom half
of the planets window will be updated. This shows the RA, decl and distance
for the major planets and the Sun.
You can type the RA and decl. values from this window, into the controls
window to find the planets on the star maps.
Contents of this disc
======================
Epoch
=====
The program epoch converts right-ascension and declination data within
yale.star style datasets from epoch 1975.0 into the epoch 2000.0.
Either the first or both epoch dates may be overridden with command line
parameters (floating point values).
use *epoch to run this program.
!StarChart The main program
!StarChart.resources Resources for !StarChart
!StarChart.yale.star Yale database of stars
!StarChart.yale.omit Stars to omit
!StarChart.con.locs Locations of constellations
!StarChart.planet.star Locations of planets
!StarChart.ephem.star Demo ephemeride data
yaleformat Explains yale.star notation
Notes
=====
Sanson's sinusoidal projection is used to map coordinates.
This projection preserves both area and linearity in Declination (y axis).
It gives good conformality (angle correctness) near the equator, so it is
useful along the Ecliptic.
Lines of RA converge at the poles (unlike cylindrical projections),
though Cassiopeia and the Dipper reproduce well.
All .star file objects are for epoch E2000.
The Messier objects in
messier.star
were taken from precessed E1975.0 data.
The additional NGC objects were taken from data in the star atlas by
Norton
and precessed from E1950.0.
Descriptions and accurate magnitude values of all Messier objects were taken
from the 1988 edition of the Royal Astronomical Society of Canada (RASC)
handbook.
=============================
Release 1.00 September 1989
======
If you have any comments, suggestions, bug reports or complaints or would
like further copies of this disc or details of the many other discs available
for the Archimedes, please write to;
David Pilling
P.O. Box 22,
Thornton Cleveleys,
Blackpool.
FY5 1LR.
United Kingdom.
From time to time enhanced versions of discs will appear. You can upgrade
your copy to the latest one by sending a blank disc with return postage to
the above address.
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00001ee0 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================|
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00002150 2e 73 74 61 72 20 20 20 20 20 20 20 20 20 20 20 |.star |
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00002180 68 61 72 74 2e 65 70 68 65 6d 2e 73 74 61 72 20 |hart.ephem.star |
00002190 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
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000021d0 20 20 20 20 20 20 20 20 20 20 20 20 45 78 70 6c | Expl|
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000021f0 6f 74 61 74 69 6f 6e 0a 0a 0a 4e 6f 74 65 73 0a |otation...Notes.|
00002200 3d 3d 3d 3d 3d 0a 53 61 6e 73 6f 6e 27 73 20 73 |=====.Sanson's s|
00002210 69 6e 75 73 6f 69 64 61 6c 20 70 72 6f 6a 65 63 |inusoidal projec|
00002220 74 69 6f 6e 20 69 73 20 75 73 65 64 20 74 6f 20 |tion is used to |
00002230 6d 61 70 20 63 6f 6f 72 64 69 6e 61 74 65 73 2e |map coordinates.|
00002240 0a 54 68 69 73 20 70 72 6f 6a 65 63 74 69 6f 6e |.This projection|
00002250 20 70 72 65 73 65 72 76 65 73 20 62 6f 74 68 20 | preserves both |
00002260 61 72 65 61 20 61 6e 64 20 6c 69 6e 65 61 72 69 |area and lineari|
00002270 74 79 20 69 6e 20 44 65 63 6c 69 6e 61 74 69 6f |ty in Declinatio|
00002280 6e 20 28 79 20 61 78 69 73 29 2e 0a 49 74 20 67 |n (y axis)..It g|
00002290 69 76 65 73 20 67 6f 6f 64 20 63 6f 6e 66 6f 72 |ives good confor|
000022a0 6d 61 6c 69 74 79 20 28 61 6e 67 6c 65 20 63 6f |mality (angle co|
000022b0 72 72 65 63 74 6e 65 73 73 29 20 6e 65 61 72 20 |rrectness) near |
000022c0 74 68 65 20 65 71 75 61 74 6f 72 2c 20 73 6f 20 |the equator, so |
000022d0 69 74 20 69 73 0a 75 73 65 66 75 6c 20 61 6c 6f |it is.useful alo|
000022e0 6e 67 20 74 68 65 20 45 63 6c 69 70 74 69 63 2e |ng the Ecliptic.|
000022f0 0a 4c 69 6e 65 73 20 6f 66 20 52 41 20 63 6f 6e |.Lines of RA con|
00002300 76 65 72 67 65 20 61 74 20 74 68 65 20 70 6f 6c |verge at the pol|
00002310 65 73 20 28 75 6e 6c 69 6b 65 20 63 79 6c 69 6e |es (unlike cylin|
00002320 64 72 69 63 61 6c 20 70 72 6f 6a 65 63 74 69 6f |drical projectio|
00002330 6e 73 29 2c 0a 74 68 6f 75 67 68 20 43 61 73 73 |ns),.though Cass|
00002340 69 6f 70 65 69 61 20 61 6e 64 20 74 68 65 20 44 |iopeia and the D|
00002350 69 70 70 65 72 20 72 65 70 72 6f 64 75 63 65 20 |ipper reproduce |
00002360 77 65 6c 6c 2e 0a 41 6c 6c 20 2e 73 74 61 72 20 |well..All .star |
00002370 66 69 6c 65 20 6f 62 6a 65 63 74 73 20 61 72 65 |file objects are|
00002380 20 66 6f 72 20 65 70 6f 63 68 20 45 32 30 30 30 | for epoch E2000|
00002390 2e 0a 0a 54 68 65 20 4d 65 73 73 69 65 72 20 6f |...The Messier o|
000023a0 62 6a 65 63 74 73 20 69 6e 0a 20 6d 65 73 73 69 |bjects in. messi|
000023b0 65 72 2e 73 74 61 72 0a 77 65 72 65 20 74 61 6b |er.star.were tak|
000023c0 65 6e 20 66 72 6f 6d 20 70 72 65 63 65 73 73 65 |en from precesse|
000023d0 64 20 45 31 39 37 35 2e 30 20 64 61 74 61 2e 0a |d E1975.0 data..|
000023e0 54 68 65 20 61 64 64 69 74 69 6f 6e 61 6c 20 4e |The additional N|
000023f0 47 43 20 6f 62 6a 65 63 74 73 20 77 65 72 65 20 |GC objects were |
00002400 74 61 6b 65 6e 20 66 72 6f 6d 20 64 61 74 61 20 |taken from data |
00002410 69 6e 20 74 68 65 20 73 74 61 72 20 61 74 6c 61 |in the star atla|
00002420 73 20 62 79 0a 20 4e 6f 72 74 6f 6e 0a 61 6e 64 |s by. Norton.and|
00002430 20 70 72 65 63 65 73 73 65 64 20 66 72 6f 6d 20 | precessed from |
00002440 45 31 39 35 30 2e 30 2e 0a 44 65 73 63 72 69 70 |E1950.0..Descrip|
00002450 74 69 6f 6e 73 20 61 6e 64 20 61 63 63 75 72 61 |tions and accura|
00002460 74 65 20 6d 61 67 6e 69 74 75 64 65 20 76 61 6c |te magnitude val|
00002470 75 65 73 20 6f 66 20 61 6c 6c 20 4d 65 73 73 69 |ues of all Messi|
00002480 65 72 20 6f 62 6a 65 63 74 73 20 77 65 72 65 20 |er objects were |
00002490 74 61 6b 65 6e 0a 66 72 6f 6d 20 74 68 65 20 31 |taken.from the 1|
000024a0 39 38 38 20 65 64 69 74 69 6f 6e 20 6f 66 20 74 |988 edition of t|
000024b0 68 65 20 52 6f 79 61 6c 20 41 73 74 72 6f 6e 6f |he Royal Astrono|
000024c0 6d 69 63 61 6c 20 53 6f 63 69 65 74 79 20 6f 66 |mical Society of|
000024d0 20 43 61 6e 61 64 61 20 28 52 41 53 43 29 0a 68 | Canada (RASC).h|
000024e0 61 6e 64 62 6f 6f 6b 2e 0a 0a 20 20 20 20 20 20 |andbook... |
000024f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00002500 20 20 20 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d | =============|
00002510 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================|
00002520 0a 0a 52 65 6c 65 61 73 65 20 31 2e 30 30 20 53 |..Release 1.00 S|
00002530 65 70 74 65 6d 62 65 72 20 31 39 38 39 0a 0a 0a |eptember 1989...|
00002540 0a 3d 3d 3d 3d 3d 3d 0a 49 66 20 79 6f 75 20 68 |.======.If you h|
00002550 61 76 65 20 61 6e 79 20 63 6f 6d 6d 65 6e 74 73 |ave any comments|
00002560 2c 20 73 75 67 67 65 73 74 69 6f 6e 73 2c 20 62 |, suggestions, b|
00002570 75 67 20 72 65 70 6f 72 74 73 20 6f 72 20 63 6f |ug reports or co|
00002580 6d 70 6c 61 69 6e 74 73 20 6f 72 20 77 6f 75 6c |mplaints or woul|
00002590 64 0a 6c 69 6b 65 20 66 75 72 74 68 65 72 20 63 |d.like further c|
000025a0 6f 70 69 65 73 20 6f 66 20 74 68 69 73 20 64 69 |opies of this di|
000025b0 73 63 20 6f 72 20 64 65 74 61 69 6c 73 20 6f 66 |sc or details of|
000025c0 20 74 68 65 20 6d 61 6e 79 20 6f 74 68 65 72 20 | the many other |
000025d0 64 69 73 63 73 20 61 76 61 69 6c 61 62 6c 65 0a |discs available.|
000025e0 66 6f 72 20 74 68 65 20 41 72 63 68 69 6d 65 64 |for the Archimed|
000025f0 65 73 2c 20 70 6c 65 61 73 65 20 77 72 69 74 65 |es, please write|
00002600 20 74 6f 3b 0a 0a 44 61 76 69 64 20 50 69 6c 6c | to;..David Pill|
00002610 69 6e 67 0a 50 2e 4f 2e 20 42 6f 78 20 32 32 2c |ing.P.O. Box 22,|
00002620 0a 54 68 6f 72 6e 74 6f 6e 20 43 6c 65 76 65 6c |.Thornton Clevel|
00002630 65 79 73 2c 0a 42 6c 61 63 6b 70 6f 6f 6c 2e 0a |eys,.Blackpool..|
00002640 46 59 35 20 31 4c 52 2e 0a 55 6e 69 74 65 64 20 |FY5 1LR..United |
00002650 4b 69 6e 67 64 6f 6d 2e 0a 0a 46 72 6f 6d 20 74 |Kingdom...From t|
00002660 69 6d 65 20 74 6f 20 74 69 6d 65 20 65 6e 68 61 |ime to time enha|
00002670 6e 63 65 64 20 76 65 72 73 69 6f 6e 73 20 6f 66 |nced versions of|
00002680 20 64 69 73 63 73 20 77 69 6c 6c 20 61 70 70 65 | discs will appe|
00002690 61 72 2e 20 59 6f 75 20 63 61 6e 20 75 70 67 72 |ar. You can upgr|
000026a0 61 64 65 0a 79 6f 75 72 20 63 6f 70 79 20 74 6f |ade.your copy to|
000026b0 20 74 68 65 20 6c 61 74 65 73 74 20 6f 6e 65 20 | the latest one |
000026c0 62 79 20 73 65 6e 64 69 6e 67 20 61 20 62 6c 61 |by sending a bla|
000026d0 6e 6b 20 64 69 73 63 20 77 69 74 68 20 72 65 74 |nk disc with ret|
000026e0 75 72 6e 20 70 6f 73 74 61 67 65 20 74 6f 0a 74 |urn postage to.t|
000026f0 68 65 20 61 62 6f 76 65 20 61 64 64 72 65 73 73 |he above address|
00002700 2e 0a 0a 0a |....|
00002704 
.