To get a list of all the variables ever available from a station, use

da.summary.general station everything forever raw_meta

Get general information on SPO aethalometer data

da.summary.general --mode=variable --description spo '.*_A81' 2014

Calculate nephelometer data summary for a specified time interval (e.g., overnight zero check)

da.summary.general thd 'B.*_S11' --rows=flavorless 51.1 51.72