ISA deviation

[michK]

Good day.

This is not really an issue with the code, but I am not sure where else to ask.

Does skaero provide the ability to add a deviation from ISA conditions?

Regards

[astrojuanlu]

Hi @michK, thanks for asking! We considered adding ISA deviations but were not able to think of a useful API. Do you have specific ideas on this?

[michK]

Hi @Juanlu001. The first thing that comes to mind is something like:

h, T, p, rho = coesa.table(1000, isa=15)

In the code, it can work like:

• First return temperature at 0 altitude
• Add isa increment to that value
• Find altitude in standard atmosphere that has that temperature, with fsolve or something
• Return h, T, p, rho at that altitude

Do you think that would work?

[astrojuanlu]

Looks good to me, though our experts in atmospheric topics are @AlexS12 and @martosc :) If you are willing to send a pull request, I can help you with the code and git in case you need it.

[michK]

I forked the project and will see if I have some time to work on that, although I cannot promise it since I am quite busy with other things, as everyone always are (-:

Perhaps it will make sense too first make sure that what I proposed is physically correct?

[AlexS12]

Hi @michK, thanks for your interest. I think we didn't implement that because we weren't able to find any data for the tests. Do you have any idea on where we could find them?
Any way, I think it is a good feature to add!

[michK]

Hi @AlexS12. Unfortunately I don't really know of such data and on further thought I realized the approach I initially suggested is not correct.