Spectrophotometer

Reference Designator
CP04OSSM-MFD37-01-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
450m
Class
OPTAA (Absorption Spectrophotometer)
Make / Model
WET Labs / AC-S

Dataset Reviews Last processed: 6/27/19, 12:28 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 150 2 0 147 0 0 523 455 / 1 1 2 Complete
2 telemetered 168 3 0 164 0 0 15,362 442 / 1 1 2 Complete
4 recovered_host 139 138 0 0 9 9 291,489 446 / 3 2 Complete
5 recovered_host 240 5 0 234 0 0 41,364 450 / 3 2 Complete
6 recovered_host 150 23 0 127 0 0 198,566 443 / 3 2 Complete
Data Ranges Review Images

Test Notes

  1. no other streams for comparison
  2. missing: ['pressure']
  3. no comparison: timestamps do not match

Data Coverage

Deployment: 12456
2%
1%99%2%15%

Lat/Lon Differences (km)

Deployment: 12456
1 0.00
2 0.510.00
4 0.490.120.00
5 0.580.820.880.00
6 0.460.200.080.910.00

System Annotations

Metadata Start Date End Date Comment
CP04OSSM-MFD37-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
12/12/14, 4:47 PM

Per vendor feedback, the first 1-2 min of each AC-S 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.

Id: 1793 By: swhite

CP04OSSM-MFD37-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
12/12/14, 4:47 PM

Per vendor feedback, the first 1-2 min of each AC-S 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.

Id: 1794 By: swhite

CP04OSSM
Method: telemetered
10/22/15, 3:38 PM 5/13/16, 1:18 PM

Fuel cell impacted available instrument power, so telemetered data are not available or reliable. Recovered data are available for instruments that could record internally.

Id: 1362 By: leila

CP04OSSM-MFD37
10/16/16, 8:00 PM 4/2/17, 9:00 PM

No telemetered data are expected because of ground faults on the seafloor Multi-Function Node. Recovered data are available from instruments recording internally.

Id: 356 By: leila

CP04OSSM-MFD37
6/28/17, 5:00 AM 10/29/17, 3:00 AM

No telemetered data expected because the DSL line has failed.

Id: 358 By: leila

CP04OSSM-MFD37
Method: telemetered
2/9/18, 1:02 PM 3/29/18, 8:42 AM

Deployment 7: Communication with the MFN instruments was disabled due to intermittent communications over the DSL line.

Id: 938 By: leila
Flag: not_available Exclude: No

CP04OSSM-MFD37
Method: telemetered
5/9/18, 11:00 PM 10/30/18, 10:30 AM

Instruments are presently disabled. Note: Instruments may continue to sample using internal batteries and storage cards.

Id: 1518 By: leila

CP04OSSM
Method: telemetered
1/30/19, 10:00 AM 4/8/19, 7:39 AM

CP04OSSM D00009 buoy broke free and went adrift on 1/30/2019, 1500UTC. All instruments on the MFN ceased telemetry on 1/30/2019 and instruments on the buoy/NSIF continued to sample through 2/1/2019. No more telemetered data expected for this deployment.

Id: 1557 By: cdobson

CP04OSSM-MFD37
5/11/19, 8:00 PM

Deployment 10: Telemetered data from all MFN instruments could be delayed up to 3 days due to a limitation in communications with the MFN.

Id: 1629 By: cdobson

CP04OSSM-MFD37-01-OPTAAD000
Stream: optaa_dj_dcl_instrument
9/29/19, 10:46 AM

The OPTAA burst duration was changed from 2 minutes to 4 minutes as of the start date/time of this annotation (start of Deployment 11).

Id: 1853 By: swhite

CP04OSSM-MFD37-01-OPTAAD000
Stream: optaa_dj_dcl_instrument_recovered
9/29/19, 10:46 AM

The OPTAA burst duration was changed from 2 minutes to 4 minutes as of the start date/time of this annotation (start of Deployment 11).

Id: 1854 By: swhite

CP04OSSM-MFD37
11/14/19, 7:00 PM

Deployment 11: MFN offline due to high voltage short on 2019-11-15. No telemetered data expected from instruments on the MFN; instruments with external batteries will continue to log internally.

Id: 1820 By: cdobson
Flag: not_operational Exclude: No

Review Notes

Metadata Start Date End Date Comment
CP04OSSM-MFD37-01-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

CP04OSSM-MFD37-01-OPTAAD000

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

By Lori Garzio, on 6/28/19

CP04OSSM-MFD37-01-OPTAAD000
Deployment: 1

beam_attenuation and optical_absorption are arrays of fill values for this deployment.

By Lori Garzio, on 6/28/19

CP04OSSM-MFD37-01-OPTAAD000
Deployment: 2

recovered_host data aren't available for download for this deployment. According to the ingest csv, the raw data files are available. These files should be ingested or the dataset should be annotated.

By Lori Garzio, on 6/28/19

CP04OSSM-MFD37-01-OPTAAD000
Deployment: 5

wavelength_a and wavelength_c are arrays of fill values for this deployment. These variables should contain the measurement wavelengths.

By Lori Garzio, on 6/28/19

CP04OSSM-MFD37-01-OPTAAD000
Deployment: 6

99% of the beam_attenuation values for this deployment are nans, outside of global ranges, or outliers (+/-5 SD).

By Lori Garzio, on 6/28/19

New Note