Now it’s a habit.
If you are into programming then you might be all too familiar with the first hello world program that we all start our learning with.
This was true for me till I got into aerospace, now my first program is always the program to calculate temperature at an altitude for international standard atmosphere.
This has become a habit. I do this for all the new programming languages that I learnt. Perl, python, VBA, vb, java, etc you name it and my first program in all this language was ISA.
The other day I was browsing my old desktop and found this long forgotten visual basic excel program that I wrote 6+ years back. It’s a small program that calculates and gives temperature and pressure at different altitude according to international standard atmosphere.
Download the excel file here. ISA is coded as UDF in excel.