Pressure altitude correction based on takeoff elevation #47
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This PR picks up #161 in the PySoar repo.
Instead of manually entering takeoff elevation, it reads it from the igc file, as soaringspot writes takeoff elevation into the file (see
LCU::HPELVELEVATION). An altitude correction is calculated by comparing it to the median pre-takeoff pressure altitude. Pre-takeoff fixes are determined via a groundspeed threshold.This correction is subsequently applied to all pressure altitudes in
task_results, resulting in better comparability in altitudes at turnpoints.