MOBY January 2005 Reprocessing (Rev April 8, 2016)

This document describes how MOBY data are processed after Jan 2005 when these modifications were implemented.

● Quality Checking

• New clear water “Kl” from Jim Mueller are now used to QC the measurements. The old deployments were reevaluated to determine if any days were now “good” based on the new lower “Kl” resulting in 147 days being changed from bad to good.

• A third flag was added to the quality checking flag, the data can now be marked "questionable". For old deployments a program will use the standard deviation and light level of the Es data to distinguish between "bad" and "questionable" data. Bad MOBY data will now be only those MOBY files which are cloud contaminated. Questionable data will be data which demonstrate a higher level of instability and are not cloud contaminated. In the current processing a person, not a program, will decide which data are questionable

● Fibered Lu red spectrograph temperature correction

• Adjust the Red SpectroGraph (RSG)• Lu data by regressing the pixels verse temperature to remove the temperature affect from the RSG data.

● System response (see table below)

• The pre and post deployment system response and wavelength calibrations were evaluated, the table below shows if the precal, postcal or mean of pre and post were used for each deployment and sensor. Also which version of the straylight correction is applied, if the thermal correction is applied and the state of the lamp calibrations. "BOL" means only the beginning of life lamp calibrations exist and "EOL" means the end of life calibrations have been evaluated and applied.

● Straylight correction

            • The SLC was based on the NIST characterization of MOBY using SIRCUS. SLC version 4.021 and 5.021 was used in this processing. But for deployments M249 and forward version 6 is used.

● Thermal Corrections (Dec-2002 MOS204cfg06)

• Based on a thermal characterization of the spectrometer system, a correction is applied to the system response and in-water data. The correction is about 0.5% per degree.

● The times of the dark scan measurements are no longer included in the computation of the average time for Lu/Es/Ed.

● An additional form of the solar normalized water leaving radiance (Lwn2) has been included.

●Other Current changes

             Integration time of Lu blue spectrograph has changed to match the red spectrograph for deployment 25 forward.

             The MODIS-2 satellite RSR's were updated