Standardize use of sonar metadata as `Sonar` global attributes vs (for EK80 only) variables#992

Merged

emiliom merged 3 commits intoOSOceanAcoustics:devfrom emiliom:sonar-attrs

Mar 17, 2023

+27-10

Commits on Mar 16, 2023

Move ek80 sonar metadata variables to global attributes, per convention; add long_name to other sonar metadata variables, and rename one such var
emiliom
committed
Set azfp sonar_software_name to AZFP
emiliom
committed

Commits on Mar 17, 2023

Updated EK80 sonar metadata variables and attributes. sonar_serial_number will be an empty attribute; clarify transceiver_serial_number vs transdicer_serial_number variables
emiliom
committed