FAQ

On 2013-11-14 17:07:45 +0000, mecej4 said:

On 11/14/2013 8:18 AM, E.D.G. wrote:
Posted by E.D.G. on November 14, 2013

In view of the fact that I mentioned the following project in
both Perl and Python Newsgroup notes and did not get any hostile
responses I am going to take a chance and mention it again in all three
of these Newsgroups. People posting responses might want to do that in
just one Newsgroup. I will check all three for responses for a few weeks.


This is the Web address for an interesting and apparently unique
computer program written using FORTRAN 77. As far as I am aware, it has
never been translated to newer language. There is a BASIC version that
was apparently written around the same time as the FORTRAN version.

http://www.bfo.geophys.uni-stuttgart.de/etgtab.html

What a number of us would like to do is obtain a copy of the
program that is written in a newer language so that we can then merge it
with the programs available through the following Web page. The new
programs would then be made available as freeware programs to
researchers around the world. This indirect link is being used in an
effort to keep Web site related spam to a minimum. I don't collect
credits by having people visit that (indirect) Web site.

http://www.freewebs.com/eq-forecasting/RH.html

If there are any programmers who might be interested in such a
translation effort then I would be interested in hearing from them.

Etgtab generates Solid Earth Tide and ocean tide data for any
location on or inside the planet. I am not aware of any other freeware
program that can do that.

SunGP available at that second Web site is the only freeware
program that I know about that generates what are sometimes referred to
as subsolar and sublunar types of data. The download code was written
using True BASIC.

If you draw a line between the centers of the sun and the Earth
then the place where that line crosses the surface of the Earth is the
subsolar location. The sublunar location is the same type of thing.
The SunGP program code is also available in Perl code, but not through
any Web sites.
If this old program is to be translated or reused, do use this
opportunity to fix some bugs in the program.

The data file contains data for 1200 waves, but the program computes
results for 1212 waves. For waves 1201 to 1212, the program ends up
calculating results based on uninitialized data. Whether or not this
affects the validity of the final output results is something that
someone knowledgeable about the field of application has to judge.

-- mecej4

Indeed! Under NAGWare Fortran it runs to completion with C=all but pulls an
undefined reference when C=undefined is added.


Lots of obsolete features and other warnings but no compiler error messages.


The obvious lessons are that 1. Fortran has very good historical continuity
and 2. the good debugging Fortran compilers do a good job.

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