ICES Seagoing Workshop 1993 Spectral light data and supporting measurements

Measurement variables and units:

• Depth = m


• Ed = µW/cm² /nm


• Eu = µW/cm² /nm


• Lu = µW/cm² /nm/steradian


• PAR = µW/cm² /nm


• NatFL = µW/cm² /nm/steradian


• Fluor (Chl a), 0-5V, 5V = 10 mg m^-3


• Tilt/Roll = °


• Temp = °C


• Cond = mmho


• Salin (pss78) = ppt

In the *.crd files SKY CONDITION is described in Norwegian with an English translation in brackets.

Sensors:

• The Spectroradiometer instrument has no monochromator or moving parts. The optics is based on arrays of photodetectors with narrowband interference and blocking filters. The wavelength bandwidth is 10nm FWHM [Full bandwidth at Half Maximum].
• The irradiance detector arrays have a cosinus correcting diffuser.
• The radians detector arrays have individual Gershun Tube radians collector optics. The collector angle is defined to 10,2 degrees in water.
• 13 channels Ed (downwelling irradiance)
• 8 channels Eu (upwelling irradiance)
• 8 channels Lu (upwelling radiance) (NatFL= Lu 683)
• Fluorescence: Sea Tech Fluorometer, Ex=425 nm, Em=685nm
• PAR scalar irradians: 1,9cm diameter TeflonÒ diffuser. 4 sensor. Biospherical Instruments Inc.
• Temperature and conductivity: Sea-Bird Electronics, inc.

Data prepared by:

Any questions that may arise regarding the Spectroradiometer instrument itself and data acquired by the instrument, should be addressed to Svenn Ove Linde at NTNU directly.

Part of the documentation has been humbly translated from Norwegian to English by Tor Knutsen at IMR.

Tor Knutsen
Tuesday 1 May 2000