marcin-osowski / igc_lib Goto Github PK

I've just discovered your interesting library and was wondering if you considered implementing a detection for when a glider is being towed by plane (or winch). would that be possible using the same sort of algorithms?

Python's standard unittest library should be sufficient.

In the Glide class we have:
def alt_change(self):
"""Return the overall altitude change in the glide, meters."""
return self.enter_fix.alt - self.exit_fix.alt

It should be return self.exit_fix.alt - self.enter_fix.alt
So that it does reflect climbs (positive value) and sinks (negative values)

The current minimum limit (40 km/h) is too high for paragliding records. Stuart suggests 8km/h, but that might be too low for gliders, as they are often towed across the airfield with speeds greater than that.

I see two solutions:

1. Decrease to 20 km/h - that should be good for both worlds.
2. Combine ground speed with vertical speed (vario), and trigger flight mode when either the ground or vertical speed is above configured thresholds.

Got this error:

File "igc_lib_demo.py", line 13, in print_flight_details
zipped = itertools.zip_longest(flight.thermals, flight.glides)

and fixed editing it with:

File "igc_lib_demo.py", line 13, in print_flight_details
zipped = itertools.izip_longest(flight.thermals, flight.glides)

not sure is the correct way?!

I'm testing your code on a Cloud9 VM with Ubuntu 14 and Python 2.7.6.

thanks,

Martino.

Hi Marcin, looks very promising. To be truly useful though the following information would be necessary:

• thermal entry height
• thermal exit height
• (average) thermal strength
• time spent in thermal (can be calculated from current data, still nice)
• optionally some wind/drift information

Maybe this is all doable with your library, if so please could you provide some instructions? Thanks.