{"datalevel":"icos_datalevel 2 = L2 release, 1 = NRT","layout":"station x time panel -- dims (station, time_mto); latitude/longitude are 1-D coords on station","open":"per-station groups <STN><height> (e.g. ARN10) hold the hourly series; the dense meteo group is the cross-station panel","qc":"apply_qc keeps the ATC flags U/O; N/K are rejects","station_dim":"station","time_coord":"time_mto","variables":"ap at rh ws wd, each with <var>_qc_flag (U/N/O/K)"}