Freeware
I provide the following software to you "as is" without any express or implied warranties of any kind including, but not limited to, any implied warranties of fitness for a particular purpose. I make no representations or warranties of any kind with respect to any support services I may render to you. I do not warrant that the software will meet your requirements or that the operation of the software will be uninterrupted or error-free or that the software contains no defects or errors. You assume full responsibility for the selection, possession, performance, and proper installation and use of the software and for verifying the results obtained therefrom. You, the user, are solely responsible for determining the appropriateness of this software for your use and accept full responsibility for all risks associated with its use.
Interactive Computer Ephemeris
0.51 (ICE) by U.S. Naval Observatory
This powerful DOS program calculates Greenwich hour angle and
declination for sun, moon, planets, and the navigational stars with a precision
equal to that given in the Nautical Almanac. ICE is very similar to the
former Floppy Almanac but covers a time span of almost 250 (!) years.
Rising, setting, and twilight times are also provided. It further performs sight
reduction (including altitude corrections) for any assumed position. Beside its
navigational functions, ICE provides highly accurate ephemeral data for
astronomers. Results can be stored in an output file. ICE, predecessor of MICA
(Multiyear Interactive Computer Almanac), is in the public domain now and no
longer controlled or supported by USNO. This program is a
must!
Download ice.zip (1
mb)
The Navigator's
Almanac 2.0 by J. K. Simmonds
Another compact and user-friendly computer almanac. Creates and
prints daily pages (interpolation tables required).
Download almanac.zip
(63 kb)
The following
utilities are interactive HTML documents containing JavaScript code. They run on
Netscape Navigator 3-6 and Microsoft Internet Explorer 4-6. They have a
user-friendly interface (like Windows programs) and require much less space than
stand-alone software.
Caution:
In
the past, I observed strange results when using other browsers, e.g., Opera.
Therefore, I recommend using the browsers from Netscape or Microsoft
only.
Sun and Moon Almanac
1.51 for the Years 1975-2015 by H. Umland
An accurate computer almanac for sun and moon. Calculates GHA
and Dec for sun and moon, GHAAries, equation of time, and the phase
of the moon. To test the program click here.
Download
sunalmnc.zip (11 kb)
Long Term Almanac for Sun and Moon 1.04 by H. Umland
A perpetual almanac for sun and moon. Calculates
GHA and Dec for sun and moon, GHAAries, equation of time, phase of
the moon, Greenwich apparent siderial time, Greenwich mean siderial time, and
the equation of the equinoxes. Requires current value for Delta T. To test the
program click here.
Download
longterm.zip (12 kb)
Sight Reduction for the Sun 1.35 by H. Umland
A user-friendly sight reduction program for
observations of the sun. Includes 40-year almanac and altitude corrections. To
test the program click here.
Download
sunsight.zip (8 kb)
Sight Reduction for the Moon 1.01 by H. Umland
A user-friendly sight reduction program for
observations of the moon. Includes 10-year almanac and altitude corrections. To
test the program click here.
Download
moonsght.zip (9 kb)
Sight Reduction Calculator 1.49 by H. Umland
A compact sight reduction program. Includes
altitude corrections. Requires GHA and declination from the Nautical
Almanac or ICE. To test the program click here.
Download
sightred.zip (4 kb)
Fix Calculator 1.07 by H. Umland
A program calculating the point where two lines of position
intersect. Replaces a graphic plot. To test the program click here.
Download fixcalc.zip
(3 kb)
RA to GHA
Converter 1.02 by H. Umland
A
utility calculating the GHA of a celestial body from right ascension and
Greenwich siderial time as provided by MICA (Multiyear Interactive Computer
Almanac). To test the program click here.
Download ragha.zip (2
kb)
Sight Reduction Tables by
H. Umland
An extended version of
Ageton's Tables in PDF format (90 pages). Includes instructions for use and a
workform template.
Download tables.zip
(650 kb)
A compact version of
these tables (15 pages only) is also available.
Download compact.zip
(334 kb)
Attention! If you
downloaded an older version of the file compact.zip (dated before Jan 17, 2002),
update it now. The old version contains a systematic error in one column of each
page.
Other Stuff
Molecular Weight Calculator 1.06
by H. Umland
A JavaScript
program for chemists and lab technicians. Calculates the molecular weight of a
chemical substance. To test the program click here.
Download molwt.zip (3
kb)
