Spectrophotometer

Reference Designator
CE06ISSM-RID16-01-OPTAAD000
Review Status
Review Complete
Note
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).
Depth
7m
Class
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 186 185 0 0 0 0 1,862,989 7 / 1 2 3 Complete
2 recovered_host 187 185 0 0 1 2 1,681,543 7 / 1 2 3 Complete
3 recovered_host 207 134 0 73 0 0 1,234,656 7 / 1 4 4 3 Complete
4 recovered_host 142 73 0 68 0 0 709,134 7 / 1 2 3 Complete
5 recovered_host 201 113 0 87 0 0 1,039,809 7 / 1 2 3 Complete
6 recovered_host 176 158 0 18 0 0 1,588,443 7 / 1 2 3 Complete
7 recovered_host 175 84 0 90 0 0 1,274,981 7 / 1 2 3 Complete
Data Ranges Review Images

Test Notes

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

Data Coverage

Deployment: 1234567
99%99%65%51%56%90%48%

Lat/Lon Differences (km)

Deployment: 1234567
1 0.00
2 1.630.00
3 1.860.260.00
4 2.070.440.240.00
5 1.900.280.080.170.00
6 1.960.330.120.130.060.00
7 2.010.390.160.090.110.060.00

System Annotations

Metadata Start Date End Date Comment
CE06ISSM-RID16-01-OPTAAD000
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: 2126 By: wingardc

CE06ISSM
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

CE06ISSM
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

CE06ISSM-RID16-01-OPTAAD000
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: 904 By: michaesm
Flag: not_operational Exclude: No

CE06ISSM
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:
DCL17
MOPAK
CTDBP (with attached FLORT)
VELPT
ACOMM
OPTAA
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)
MOPAK
CTDBP3 (with FLORT)
VELPT1
UCSPP (aka ACOMM)
DCL16 (NSIF)
CTDBP1 (with DOSTA) (should internally log)
FLORT
PCO2W1 (should internally log)
PHSEN1 (should internally log)
OPTAA1
NUTNR (should internally log)
SPKIR
VELPT2 (should internally log)

Id: 899 By: michaesm

CE06ISSM
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

CE06ISSM-RID16-01-OPTAAD000
Method: telemetered
Stream: optaa_dj_dcl_instrument
7/15/19, 12:00 PM 10/12/19, 4:18 PM

The instruments external (in-situ) temperature sensor has failed. Data from a co-located CTD (CE06ISSM-RID16-03-CTDBPC001) should be used to correct for effects of temperature and salinity on the absorbance and attenuation spectra.

Id: 1700 By: wingardc
Flag: fail Exclude: No

CE06ISSM-RID16-01-OPTAAD000
Method: recovered-host
Stream: optaa_dj_dcl_instrument_recovered
7/15/19, 12:00 PM 10/12/19, 4:18 PM

The instruments external (in-situ) temperature sensor has failed. Data from a co-located CTD (CE06ISSM-RID16-03-CTDBPC001) should be used to correct for effects of temperature and salinity on the absorbance and attenuation spectra.

Id: 1755 By: wingardc
Flag: fail Exclude: No

CE06ISSM-RID16-01-OPTAAD000
Method: telemetered
4/16/20, 12:35 PM

Data from the sensor indicates that it is heavily bio-fouled. That fact, combined with reduced battery power on a mooring that needs to operate well past its originally scheduled recovery date, resulted in the decision to power off the sensor for the remainder of the deployment.

Id: 2069 By: wingardc
Flag: not_operational Exclude: No

Review Notes

Metadata Start Date End Date Comment
CE06ISSM-RID16-01-OPTAAD000

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

CE06ISSM-RID16-01-OPTAAD000

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

By Lori Garzio, on 6/28/19

CE06ISSM-RID16-01-OPTAAD000
Deployment: 1

84% of the beam_attenuation values for this deployment are nans or outside of global ranges.

By Lori Garzio, on 6/28/19

New Note