View source for Storing soundings in SPDB

=== '''Overview''' ===
Thermodynamic soundings are important in RadxPid because temperature helps distinguish between liquid and frozen hydrometeors. Soundings can be ingested into RadxPid in three ways:
* entered manually in the PID thresholds file - only one sounding is allowed.
* estimated from model output (Grib2toMdv, Mdv2SoundingSpdb) - this is the preferred method.
* observed sounding downloaded and converted from native format to SPDB - described below.