Spectrophotometer

Reference Designator
CE04OSSM-RID27-01-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 399 399 0 0 0 0 3,943,870 7 / 1 2 3 Complete
2 recovered_host 139 139 0 0 0 0 2,169,718 7 / 1 2 3 Complete
3 recovered_host 203 203 0 0 0 0 3,176,672 7 / 1 2 3 Complete
4 recovered_host 176 176 0 0 0 0 2,751,656 7 / 1 2 3 Complete
5 recovered_host 175 174 0 0 0 0 2,725,396 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']

Data Coverage

Deployment: 12345
100%100%100%100%99%

Lat/Lon Differences (km)

Deployment: 12345
1 0.00
2 0.260.00
3 1.822.090.00
4 0.340.182.100.00
5 1.721.970.481.940.00

System Annotations

Metadata Start Date End Date Comment
CE04OSSM-RID27-01-OPTAAD000
4/7/15, 7:00 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: 2097 By: wingardc

CE04OSSM-RID27-01-OPTAAD000
4/20/19, 4:13 PM 10/21/19, 5:56 PM

Immediately after deployment, power to the instrument indicated a short to seawater. Either the instrument has flooded or the cable(s) to the instrument or external pump have failed. No further data will be available from this instrument for this time period.

Id: 1683 By: wingardc
Flag: not_operational Exclude: No

CE04OSSM-RID27-01-OPTAAD000
10/21/19, 2:30 PM

The OPTAA burst duration was changed from 2 minutes to 4 minutes beginning 2019-10-21T18:30:00 UTC.

Id: 1872 By: wingardc

CE04OSSM-RID27-01-OPTAAD000
Method: telemetered
3/27/20, 2:35 PM

Due to a change in the program telemetry systems, data from this sensor will not be telemetered to shore. The data is still being collected and will be available upon mooring recovery.

Id: 2066 By: wingardc
Flag: not_available Exclude: No

CE04OSSM
Method: telemetered
5/6/20, 10:40 PM 5/11/20, 8:00 PM

Due to a bug in the mooring telemetry system, data during this time range was not telemetered to shore. It was recorded on the mooring and instruments and will be available in the recovered data streams.

Id: 2181 By: wingardc
Flag: not_available Exclude: No

Review Notes

Metadata Start Date End Date Comment
CE04OSSM-RID27-01-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

CE04OSSM-RID27-01-OPTAAD000

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

By Lori Garzio, on 6/28/19

CE04OSSM-RID27-01-OPTAAD000

42%-57% of the optical_absorption values for deployments 2-4 are nans, fill values, outside of global ranges, or outliers (+/- 5 SD).

By Lori Garzio, on 6/28/19

CE04OSSM-RID27-01-OPTAAD000
Deployment: 1

61%-70% of the beam_attenuation and optical_absorption values for this deployment are nans, fill values, outside of global ranges, or outliers (+/- 5 SD).

By Lori Garzio, on 6/28/19

New Note