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Density Array Fluorometer summary data

Mounted at a nominal depth of 8m on a cable at the MVCO Air-Sea Interaction Tower along with 3 microcats at 2 meters, 8 meters and 14 meters. For a more acurate depth, see associated data ucat08_s.

Sensors on density array were Wetlabs FLSB or FLNTU (with backscatter for turbidity) ... see after table below:

Most of the data parameters include values for the mean and median value as well as the standard deviation of the variable. The table below shows the field name suffix used to differentiate amoung the different values:

Field name Description
_mean The mean value of the variable over the averaging period
_m50 The median value of the variable over the averaging period
_std The standard deviation of the variable over the averaging period
_length The number of valid data points collected over the averaging period

Here is the list of field names:

Field name Description Units
Year The year the data were collected n/a
Yday Decimal year day UTC, January 1 at 00:00 is 1.0
MO The month the data was collected UTC
DA The day the data were collected UTC
HH The hour the data were collected UTC
MM The minute the data were collected UTC
SS The second the data were collected UTC
lrec_chl Total number of records collected during averaging period n/a
fl_ref Mean fluorescence reference channel raw counts
fl_mean Mean fluorescense raw counts
fl_median Median fluorescense raw counts
fl_std Stdev in burst fluorescense raw counts
fl_len no. recs passing filter n/a
Chlorophyll mean value from fl_mean mg/m^3
NTU_Ref mean NTU (Turbidity) reference channel raw counts
NTU_mean Mean NTU raw counts
NTU_median Median NTU raw counts
NTU_std Stdev in NTU raw counts
NTU_len no. recs passing filter n/a
bb_beta Mean backscattering from NTU_mean Beta/m/steradian angle
Thermistor Mean raw counts

Deployed 9/4/07 - 12/9/07

FLNTUSB-693 (calibrated 3/29/07)
Sf = 0.0059, off = 49 & beta: Sf_b = 1.759e-5, off_b = 48
maxcounts = 4121
NOTE: baud rate issues at beginning of deployment

Deployed 12/9/07 -
FLSB-417 (calibrated 6/1/2007)
Sf = .0079 and off = 87
maxcounts = 16330
NOTE: deployed 12/9/07, but mininode failed (bad connector), so no data until 1/16/08

NOTE: mininode failed again (bad Ethernet connector) 2/25/08; replaced by DAC_moxanode 3/13/08

Updated: 4/16/08 jjf