This is the Linux app named IO91pm whose latest release can be downloaded as io91pm-20230404.tgz. It can be run online in the free hosting provider OnWorks for workstations.
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IO91pm
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DESCRIPTION
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
---------------
* 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 "Rijksdriehoekscoördinaten" 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 τ (tau) instead of π (math pi).
Audience
End Users/Desktop
User interface
Command-line
Programming Language
C
Categories
This is an application that can also be fetched from https://sourceforge.net/projects/io91pm/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.
