Reference Designator
Review Status
Review Complete
The OPTAA data were run through the automated QC tests, but were not reviewed visually. Plots are provided in the “Review Images” section only for wavelengths on/near 676nm (if the wavelengths are defined in the .nc files).
OPTAA (Absorption Spectrophotometer)
Make / Model
WET Labs / AC-S

Dataset Reviews Last processed: 6/26/19, 6:49 PM

QC Check Info
Dep. Preferred Method Stream DD FD SG EG Gaps GD TS Rate (s) Pressure Comp. Time Order Valid Data Missing Data Data Comp. Missing Coords. Review
1 recovered_host 186 49 0 34 1 102 470,644 30 / 1 2 Complete
2 recovered_host 187 173 0 0 1 14 1,748,886 29 / 3 1 2 Complete
4 recovered_host 142 142 0 0 0 0 2,248,240 29 / 3 1 2 Complete
6 recovered_host 176 176 0 0 0 0 1,770,235 29 / 3 1 2 Complete
Data Ranges Review Images

Test Notes

  1. no comparison: timestamps do not match
  2. missing: ['pressure']
  3. pass unique test - ascending not tested

Data Coverage

Deployment: 1246

Lat/Lon Differences (km)

Deployment: 1246
1 0.00
2 1.630.00
4 2.070.440.00
6 1.960.330.130.00

System Annotations

Metadata Start Date End Date Comment
10/7/14, 3:45 PM

Per vendor feedback, the first 1-2 min of each OPTAA instrument sampling period should be considered suspect. Signal drift can occur as the instrument warms up, flushes with seawater, and the filter wheel spins up. Users are encouraged to delete the first minute of data, at a minimum, from each measurement burst and then calculate a median average of the remaining data from the burst before working further with the OPTAA data.

Id: 2127 By: wingardc

10/7/14, 3:45 PM 9/30/16, 8:00 PM

All of the inshore surface moorings suffer from an issue called the 'top of the day problem.' A race condition exists in the CPM firmware when transferring daily log files harvested from the various sub-components in a buoy system (e.g. DCL16, CPM3, DCL35, etc) over the Iridium RUDICS connection. The primary CPM rsync's data files from the various sub-components to a central data directory. The first time a daily file is created/copied into that directory (usually shortly after midnight), a compressed copy of the file is created and that compressed file is queued up in a separate text file for transmission to shore. The transfer routine reads that text file and processes the files from that list in order from top to bottom. Once that compressed file is transferred to shore, no further updates for that file are sent to shore. Meanwhile, the CPM continues to rsync data from the different sub-components, updating the original daily log file. The net result is that data is accumulating in the daily log file for an instrument, but we may see only one record (or none) depending on when the rsync job occurred and the compressed file was created and staged for transfer to shore. This affects telemetered data only.

Id: 897 By: michaesm

7/26/16, 8:00 PM 10/3/16, 8:00 PM

Correcting the iridium data telemetry issues, permitting full telemetry of data files, resulting in greater power consumption than anticipated. Result is power level of the battery pack has dropped below operational limits and subsystems can no longer power instruments. Shutting the mooring down, and placing in a low power maintenance mode. 11 instruments offline.

Id: 898 By: michaesm
Flag: not_operational Exclude: No

9/26/16, 8:00 PM 4/30/17, 8:00 PM

Instrument not deployed during Fall 2016 cruise because its refurbishment was not complete before the cruise.

Id: 903 By: michaesm
Flag: not_operational Exclude: No

12/31/16, 7:00 PM 4/22/17, 8:00 PM

The buoy main battery voltage is being drawn down faster than expected. Have shutdown further power to DCL17 and to the OPTAA on DCL16. This takes the following instruments offline:
CTDBP (with attached FLORT)
Have had to power off DCL17 and DCL16 and reduce call in frequency to 12 hours. Will still (at least should) receive data from MFN. Instruments affected are:
DCL17 (Buoy)
CTDBP1 (with DOSTA) (should internally log)
PCO2W1 (should internally log)
PHSEN1 (should internally log)
NUTNR (should internally log)
VELPT2 (should internally log)

Id: 899 By: michaesm

10/2/17, 8:00 PM 3/2/18, 3:44 AM

CAMDS not serviced by vendor in time for deployment

Id: 1236 By: michaesm
Flag: not_operational Exclude: No

Method: telemetered
10/17/19, 12:45 AM 5/23/20, 8:00 PM

Updated, 2020-05-24: Between 2019-10-17 and 2020-05-24, the clock on CPM3 was off by approximately 27 minutes. Communications between the buoy and the MFN were out of sync during this time period. The clock was automatically updated during routine operations on May 24, 2020 to the correct time, allowing communications and normal operations on the MFN to resume. *Communications to the seafloor sensors failed. Status of the instrumentation and data loggers is unknown. With the exception of the VEL3D and OPTAA, the sensors on the seafloor platform should continue to autonomously sample for the remainder of deployment. Until we recover and redeploy the mooring in the spring of 2020, no further telemetered data will be available from the seafloor sensors.

Id: 1759 By: wingardc
Flag: not_available Exclude: No

Review Notes

Metadata Start Date End Date Comment

According to Roesler and Barnard (Optical proxy for phytoplankton biomass in the absence of photophysiology: Rethinking the absorption line height, Methods in Oceanography, 2013), “absorption meters are highly prone to biofouling, particularly biofilms which not only attenuate the collimated beam but also impact the scattering properties of the optical surfaces and tubes. In productive coastal waters biofouling can have significant impacts (i.e. 10% of the signal) within one to two weeks”.

By Lori Garzio, on 6/28/19


There is no pressure variable in the .nc files. This should be a coordinate.

By Lori Garzio, on 6/28/19

Deployment: 1

70% of the optical_absorption values for this deployment are nans or outside of global ranges.

By Lori Garzio, on 6/28/19

New Note