Here is a simple example of how to use csv output format.
(insert your own client_id for 'user name'. client_id can also be entered into the request like this: https: //client_id@frost.met.no/...)
sourceId,referenceTime,air_temperature(-),min(air_temperature pt1h)(-),max(air_temperature pt1h)(-) sn18700:0,2009-12-01T06:00:00.000Z,-3.4,-3.8,-2.8 sn18700:0,2009-12-02T06:00:00.000Z,-7.8,-8.0,-7.5 sn18700:0,2009-12-03T06:00:00.000Z,-6.4,-7.4,-5.3 sn18700:0,2009-12-04T06:00:00.000Z,0.7,0.2,0.7
Each line have a station per time and one value per element (used default level and timeoffset).