Dataset: Bio-optical spar
Deployment: OC415-01

Please refer to descriptions for each cruise (deployment).

Calibration of instruments:
SBE-39s and SBE-37 were calibrated by SeaBird.

ECO-FLNTU Chl a and Optical Backscatter sensors were compared to the Oceanus CTD fluorometer during
comparison casts for each cruise.

Details of the UCSB Spar buoy deployed during EDDIES 2005 Survey 1.

The Spar buoy was deployed at the center of eddy A4 just before ending
science work and heading for Bermuda. It was intended to stay deployed
throughout the Tracer 1 cruise and to be recovered early in Survey 2 cruise.
However, due to the threat of Tropical Storm Franklin bearing down on the area,
the Tracer people pulled the array prior to leaving the area. Some instruments
were stopped, or made safe by the Oceanus Science Tech, and data was downloaded
at the start of Survey 2. It was determined that the ECO-FL sensor had jammed
just prior to deployment. Therefore, no Chl a data was obtained at 80 meters.

Calibration of instruments:

SBE-39s and SBE-37 were calibrated by SeaBird.

Between the EDDIES 2004 and 2005 deployments, the ECO-FLNTU units were
returned to WETLabs and the sensitivity greatly increased in both the Chl a and
Optical Backscatter channels. The borrowed ECO-FL unit did not have the
sensitivity changed.

ECO-FLNTU Chl a and Optical Backscatter sensors were compared to the Oceanus
CTD fluorometer during a comparison cast (oc415-1 062) during EDDIES 2005 Survey
1. The ECO-FLNTU and ECO-FL readings of all 4 time records were matched with
the new WETLabs CTD fluorometer factory calibration values for the cast. There
was significant differences in the Chl offset count for all 4 ECO sensors. One
of the 4 ECO Chl a factory calibration slopes agreed well with the new CTD
fluorometer (calibrated also by WETLabs) but the other 3 sensor chl calibrations
were off by +32%, +46%, and -44%. Without determining this matchup of
sensitivities, the mooring data would have been very misleading.

If the comparison of the extracted Chl a and Phaeo a descrete samples against
the new CTD fluorometer readings determine that it is reading significantly
different from reality, the moored data can be adjusted by using the same
scaling factor being applied to the CTD data.

The Optical Backscatter channel of the ECO-FLNTU was more sensitive, but
still showed mostly noise and sudden shifts that were unrelated to changes in
Chl fluorescence. Therefore the data are not reported in our report.

Drogue Mooring details:								
		Date		GMT	Latitude	Longitude
Launch:		14-Jul-05	1401	30 41.45 N	66 41.47 W	
Recovery:	23-Jul-05	1338	30 19.87 N	67 19.29 W
	

	Buoy Instruments: 							
Depth:			Sampling interval    Data Recovery  s/n	
Surface	ARGOS/GPS positions  	every 30 min	 96%		
10	temp, pressure		1min		100%	SBE39-376

50	temp			1min		100%	SBE39-497

70	temp			1min		100%	SBE39-499

80	temp			1min		100%	SBE39-500
80	Chl fl			4min		  0%	ECO-FL 055

93	temp			1min		100%	SBE39-501
93	Chl fl, turbidity	4min		100%	ECO-FLNTU 085

106	temp, cond, pressure	1min		100%	SBE37SM-406
106	Chl fl, turbidity	4min		100%	ECO-FLNTU 086

120	temp			1min		100%	SBE39-502
120	Chl fl, turbidity	4min		100%	ECO-FLNTU 087


125-143	Holey Sock Drogue	none