Continuous measurements of emissivity at 89 and 37 GHz frequencies in vertical and horizontal polarizations at a fixed elevation angle of 55 degrees during transit and scanning elevation angles of 30-150 degrees at every station were acquired. The radiometers were installed at the 200 level on the CCGS Amundsen icebreaker on the port side. Generally the instruments acquired data at the fixed elevation angle during transit, and 3-5 scans were performed at every station along with auxiliary data collection (GPS data, geographic location of the station, photographs of the same field of view, air temperature, wind data, atmospheric conditions, surface characteristics, etc.). The acquired data are in binary format which is produced for every scan and fixed modes. The time in the data logger is generally set to UTC. An example filename would be 'RADDAT-2007-11-06-122647.DAT'.

The webcam was installed on the navigation deck of CCGS Amundsen on the port side (see http://www.amundsen.ulaval.ca/index.php?url=11511&sub=1). Its field of view nearly match with that of microwave radiometer. Thus, both of the instruments look at the same area on the ground. The webcam is set to acquire JPEG images every 5 seconds or it can be set according to the requirement by the user. A sodium lamp has be lighted on the port side to get the pictures during the night time.