For questions, contact:
Laura Nazzaro
nazzaro@marine.rutgers.edu


HEADER INCLUDES:
- glider name
- descriptive filename for segment
- file type for segment
- non descriptive 8.3 file name for segment
- starting time of segment (GMT)
- number of profiles in segment
- max_pressure_decibars = maximum depth
- file size
- number of records in the profile
- time of profile (GMT)
- middle latitude of profile
- middle longitude of profile
- maximum pressure of profile (= maximum depth)
- profile direction (u=up, d=down)

DATA: (headers include sensors and units)
- sci_m_present_time: time (GMT) in seconds since Jan 1 1970
- drv_sciwater_pressure: pressure in decibars, equals depth of measurement in meters
- drv_latitude: latitude, degrees N
- drv_longitude: longitude, degrees E
- drv_sea_water_temperature_cor: corrected temperature in degrees celsius
- drv_sea_water_salinity_cor: corrected salinity in PSU
- drv_sea_water_density_cor: corrected density in kilogram per meter cubed
- drv_sci_oxy3835_wphase_oxygen_cor: corrected dissolved oxygen concentration
- drv_sci_oxy3835_wphase_mass_cor: corrected dissolved oxygen concentration (direct conversion from drv_sci_oxy3835_wphase_oxygen_cor to get to milligram per liter/parts per million)
- drv_sci_oxy3835_wphase_saturation_cor: corrected dissolved oxygen saturation
- sci_flbbcd_chlor_units: chlorophyll concentration in micrograms per liter

QARTOD QUALITY CONTROL TESTS: (see notes after variable list)
- temperature_qartod_grossrange: flags temperature measurements outside the manufacturer-defined sensor limits (fail) or calibration limits (suspect)
- temperature_qartod_climatological: flags temperature measurements outside a reasonable range for the given region and season
- temperature_qartod_spike: flags temperature measurements very different from the neighboring data
- salinity_qartod_climatological: flags salinity measurements outside a reasonable range for the given region and season
- salinity_qartod_spike: flags salinity measurements very different from the neighboring data
- density_qartod_spike: flags density measurements very different from the neighboring data
- oxygen_qartod_grossrange: flags dissolved oxygen (oxygen and mass) measurements outside the manufacturer-defined sensor limits
- oxygen_qartod_climatological: flags DO (oxygen and mass) measurements outside a reasonable range for the given region and season
- oxygen_qartod_spike: flags DO (oxygen and mass) measurements very different from the neighboring data
- oxysaturation_qartod_grossrange: flags dissolved oxygen saturation measurements outside the manufacturer-defined sensor limits
- oxysaturation_qartod_climatological: flags DO saturation measurements outside a reasonable range for the given region and season
- oxysaturation_qartod_spike: flags DO saturation measurements very different from the neighboring data


NOTES ON THIS YEAR'S DEPLOYMENTS:
- We include the same QARTOD test flags as last year (gross range, climatological, spike, or some combination for each sensor). The manual is defined for CTD data but are relevant to DO as well. Raw dissolved oxygen that failed either the gross range test or the spike test was removed before shifting in time, and the tests were reapplied after shifting. Manual: https://cdn.ioos.noaa.gov/media/2017/12/Manual-for-QC-of-Glider-Data_05_09_16.pdf; Flag Values: 1=pass, 3=suspect, 4=fail
- There were optode issues during the first deployment (September-October 2022). Persistent issues in oxygen data quality were seen between approximately 2022-10-07 00:30Z and 2022-10-08 17:45; we removed all dissolved oxygen data from this time window. Sporadic issues were also seen outside this time range, so we added a generic 'optode_flag' to identify suspect data that is not easily identified by the QARTOD tests. Following the breakdown of stratification, oxygen concentration was consistently above 7.36 mg/L. This optode_flag "test" flags any profiles after 2022-10-3 (when stratification broke down) with data falling below 7.04 mg/L as suspect (3) and any profiles with data falling below 6.40 mg/L as failed (4). We were unable to identify any specific issues with the optode and some data that is not flagged may also be questionable. The optode_flag test was not applicable earlier than 2022-10-03 because the water was stratified with a wider range of concentrations. Data looks ok during the first half of the deployment but issues may have been masked by the wide range of concentrations. We believe these optode issues were limited to the first deployment of the season.