[ARTS] ARTS2 descent rate calculation

[Jeff Taylor]

James Dougherty wrote:
> Hi,
>  
> I'm wondering if someone can explain why the ARTS2 shows a lower 
> descent rate for
> the drogue then the main. In all of these flights, the main and drogue 
> have deployed
> at apogee (not enough shear pins, or wrong size), so I would (if 
> anything) expect them
> to read the same.
>  
>  
> Thanks,
> -James
>  
Well, I would say that they do read the same, I mean 21ft/sec vs 23 
ft/sec?  That's pretty darn close.

I might be able to offer more insight if I saw the actual flight data, 
but there probably isn't much to see.

These aren't complicated calculations, all the program does is this:  
(altitude at apogee - altitude at main event) / (time at main event - 
time at apogee)
and (altitude at main event ) / (time at touchdown - time at main 
event).  You will see a "Can't calc" if you run out of memory before one 
of the events happens. 

-Jeff