lower high-altitude speed availability for mistnet runs

[adokter]

Documenting for potential future improvements or added warnings. MisNet runs use only 5 elevation sweeps, therefore especially high altitude bins tend to have relatively poorer coverage for MistNet runs compared to runs using all elevations. This causes problems with speed estimation at high altitudes, with VVP fits occasionally failing due to azimuthal data gaps (as indicated by quantity gap set to TRUE for higher altitude bins).

This is problematic for certain high-altitude layering cases that have a lot of density in the 2-4 km agl band, as illustrated here for file KGRK20230907_055711_V06.zip

radial velocity data availability for mistnet run:

When including all elevation sweeps (non-mistnet run), much more data is available:

Mistnet run velocity estimate has missing values at higher altitude:

non-Mistnet run velocity estimate