io91pm

We have hosted the application io91pm in order to run this application in our online workstations with Wine or directly.

Quick description about io91pm:

A Maidenhead QTH-Locator calculator for the command-line, possibly of interest for "ham's", radio amateurs and others who like to use GNU/Linux; based on GM4ANB's book.

"IO91pm is the Maidenhead-Locator for Maidenhead"
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Background
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* For another little project, I wanted a QTH-Locator calculator for the UNIX (GNU/Linux, bash) command-line.
* There are many, some very good, online QTH resources, but I wanted something that would also work off-line.
* There are also several GUI- (X11-, etc.-) based calculators, but I wanted something for the command-line, something that could also be used in (bash-)scripts.
* The software-repository for my (Ubuntu-derived) Linux distro has only one such a QTH-calculator.
--- This program has a few issues (I could perhaps have lived with).
--- Made worse by the adaption for Ubuntu, that removed half of its functionality
So, I had to make my own. (Which I enjoyed anyhow.).

Features:

• Proper support for 2, 4, 6, 8 or 10 character locators. A 10 character locator specifies a cell of more-or-less the size of a house.
• Calculations from cell-center (instead of south-west corner, as some programs do). This is especially better when computing between locators of different resolutions (locators with different number of characters).
• Distance calculation based on the best of GM4ANB's algorithms (instead of the simplest, as some programs do). The simplest algorithm can introduce an error of up-to a hundred meters within a relatively small, flat and low-lying, mid-latitude area such as the Netherlands. The best of GM4ANB's algorithms computes distances that fit, within a few meter, to the Dutch national grid reference system, the "Rijksdriehoeksco�rdinaten" system.
• This program reports an estimate of the error range.
• By renaming the program (or creating a (soft-) link to it) with as new name a valid QTH locator, then distance calculations will be done from that locator.
• The program can produce LaTeX output.
• And, lastly, the code uses ? (tau) instead of ? (math pi).

Audience: End Users/Desktop.
User interface: Command-line.
Programming Language: C.
Categories: