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Underway data are continuous data collected while transiting between stations on CalCOFI cruises. Data collection usually continues while on station so there may be a few to several hours of data in a limited area. Processed underway data are 10 minute average, CTD or bottle sample corrected data. Different vessels such as NOAA RV Bell M Shimada may have significantly more underway data collected than RV Ocean Starr. NOAA vessel data are typically collected using the SCS shipboard computer system and in a variety of formats and frequencies. SIO vessel data are typically collected using the MET shipboard meterological system which combines multiple sensor measurements into a 30 second comma-delimited record.

0401JD : January 2004, R/V David Starr Jordan : SST, Salinity

SCIMS: Data • Quality Flags • Header
Station Data: Data • Quality Flags • Header
Cross Correlation: Data and Plots
Metadeta: Data
Path Plots: Temperature (PDF / PNG) • Salinity (PDF / PNG)

0404NH : April 2004, R/V New Horizon : SST, Salinity

SCIMS: Data • Quality Flags • Header
Station Data: Data • Quality Flags • Header
Cross Correlation: Data and Plots
Metadeta: Data
Path Plots: Temperature (PDF / PNG) • Salinity (PDF / PNG)

0407JD : July 2004, R/V David Starr Jordan : SST, Salinity

SCIMS: DataQuality FlagsHeader
Station Data: DataQuality FlagsHeader
Cross Correlation: Data and Plots
Metadeta: Data
Path Plots: Temperature (PDF / PNG) • Salinity (PDF / PNG)

0411RR : November 2004, R/V Roger Revelle : SST, Salinity, Fluorescence, Chlorophyll

SCIMS: DataQuality FlagsHeader
Station Data: DataQuality FlagsHeader
Cross Correlation: Data and Plots
Metadeta: Data
Path Plots: Temperature (PDF / PNG) • Salinity (PDF / PNG) • Fluorescence (PDFPNG) • Chl A (PDFPNG )

 

SIO vessels collect MET (meterological system) underway data. These data include surface TSG measurements combined with fluorometry, pH, ship instrumentation (such as heading & speed) & meterological data. These values may be combined into 30 second records and collected into daily files. CTD near-surface data are used to correct underway temperature, salinity, & fluorometer measurements. Underway data is available in raw, 30sec MET ascii format and 10 minute binavg, corrected data.

NOAA vessels collect SCS data which may or may not be reported in a single, combined record during the cruise. Since data are sampled at different frequencies & into separate data files. post-cruise processing to a common time-scale is required. This requires significantly more effort which may delay the availability of the underway data products.

SIO-CalCOFI processes SIO, NOAA, and other CalCOFI ship underway data and convert the data into a universal ascii data format. Final underway data files contain both the processed ship specific averaged data and corrected values.  Below are examples of column headers and their units.
 

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CalCOFI cruises collect underway data on NOAA vessels from the SCS (Shipboard Computer System). These data may or may not be combined into a common, comma-delimited, ascii file. Most sensor data are collected at different frequencies and require post-cruise processing to combine into a standard time frame. RV New Horizon's underway dataset may be a few hundred megabytes whereas NOAA underway dataset requires 3 DVDs to archive. Please refer to CalCOFI's Underway Data page for merged, processed data.

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CalCOFI cruises on SIO vessels, particularly RV New Horizon, collects underway data recorded by the MET (shipboard meterological) system. Every thirty-seconds, a record of surface measurements (T, S, Fl, pH), ship measurements (speed, heading, Ashtech, winch, PDR, & more), and meterological measurements (wind, surface PAR, barometer, & more) are combined into a single, comma-delimited record. Each data field is defined by the adjacent field variable label  ie ...10.0,WS,320,WD... is 10.0kts wind speed, 320° wind direction. Please refer to the list below or to MetAcq Operator’s Manual (Shipboard Technical Support Revision 2.00 March 2009) for more information

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