add HALO flight circle dataset decomposition

[leifdenby]

Adding functionality to enable selection of points inside and outside of HALO flight circle

eurec4a_environment.decomposition.space.inside_HALO_flight_circle(ds=ds)

TODO

• functionality to work out it if point is inside or outside flight circle
• creation of data array with True/False depending whether inside or ourside

[leifdenby]

I just need to fix the testing and requirements now. But with

import eurec4a_environment.source_data as source_data
import eurec4a_environment.decomposition.space as space_decomposition

cat = source_data.get_intake_catalog()
ds_rs = cat.radiosondes.meteor.to_dask()

# make a mean lat,lon position for each radiosonde
ds_rs_mean = ds_rs.mean(dim="alt")
ds_rs_mean['lat'] = ds_rs.lat.mean(dim="alt", keep_attrs=True)
ds_rs_mean['lon'] = ds_rs.lon.mean(dim="alt", keep_attrs=True)
ds_rs['inside_circle'] = space_decomposition.inside_halo_circle(ds=ds_rs_mean)

ds_rs_daily_mean = (ds_rs
                        .where(ds_rs.inside_circle, drop=True)
                        .swap_dims(dict(sounding="launch_time"))
                        .resample(launch_time="1D").mean()
                   )
ds_rs_daily_mean.sel(alt=slice(0, 5000)).q.plot(y="alt", size=3, aspect=4.)

I can now produce