Attached to each of the Southern Ocean moorings is an upwards-facing OCI-200 irradiance sensor at 50 m depth.  The measured parameters of each OCI-200 sensor head include downwelling irradiance at seven wavebands with bandpasses of approximately 10 nm. Six of the wavebands were the same for all 12 sensor heads, centered at:

412, 443, 490, 555, 665 and 683 nm.

The seventh waveband (channel 4 on all sensor heads) was centered at 511 nm for six of the sensor heads (moorings 4, 5, 7, 10, 11 and 12) and 700 nm for the remaining six sensor heads (moorings 1, 2, 3, 6, 8 and 9).   Measurements were made every 6 minutes.  Further information on this instrument is available from Satlantic, Inc.

Calibrations of the sensor heads were made by Satlantic, Inc. before and after the mooring deployment. The pre-deployment calibrations were made at room temperature (20^oC), whereas the post-deployment calibrations were made at approximately 0^oC (closer to the water temperature near the moorings).

Webpage by Jasmine S. Bartlett, Oregon State University.