Spectrophotometer

Reference Designator
CE02SHSM-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, 6:48 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 174 174 0 0 0 0 1,711,841 7 / 1 2 3 Complete
2 recovered_host 223 223 0 0 0 0 2,206,533 7 / 1 2 3 Complete
3 recovered_host 135 60 0 73 3 4 838,209 7 / 1 2 3 Complete
4 recovered_host 209 209 0 0 0 0 3,295,307 7 / 1 2 3 Complete
5 recovered_host 179 169 0 1 1 9 2,619,289 7 / 1 2 3 Complete
6 recovered_host 177 166 1 0 1 6 2,772,997 7 / 1 2 3 Complete
7 recovered_host 176 147 0 0 3 32 1,411,848 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: 1234567
100%100%44%100%94%94%84%

Lat/Lon Differences (km)

Deployment: 1234567
1 0.00
2 0.330.00
3 0.290.090.00
4 0.110.440.400.00
5 0.280.090.010.390.00
6 0.110.440.400.000.390.00
7 0.290.090.000.400.010.400.00

System Annotations

Metadata Start Date End Date Comment
CE02SHSM-RID27-01-OPTAAD000
4/2/15, 4:15 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: 2096 By: wingardc

CE02SHSM-RID27-01-OPTAAD000
7/15/16, 8:00 PM 10/3/16, 8:00 PM

The OPTAA on the CE02SHSM-00003 NSIF has failed. Unit started reporting variable values, including raw counts of 1 for all channels, before stopping completely on 2016-07-18.

Id: 881 By: michaesm
Flag: not_operational Exclude: No

CE02SHSM-RID27-01-OPTAAD000
10/20/19, 1:30 PM

The OPTAA burst duration was changed from 2 minutes to 4 minutes beginning 2019-10-20T17:30:00 UTC.

Id: 1871 By: wingardc

CE02SHSM-RID27
Method: telemetered
11/22/19, 3:45 PM 1/7/20, 1:30 PM

Due to reduced power on the mooring (limited recharging of the batteries with light winds and sea lions blocking the solar panels), we have had to reduce the operating schedule of the 7 meter platform. Normally we run the system continuously, but have reduced that schedule to hourly.

Id: 1836 By: wingardc

CE02SHSM-RID27
Method: telemetered
1/13/20, 1:45 PM

During a large storm event on 2020-01-11, power from the wind turbines was lost. This is the primary means of recharging the battery system on the mooring. With the loss of recharging power, we have had to implement a conservative power model. These systems and instruments have been disabled for the foreseeable future, and no further data will collected from them.

Id: 1903 By: wingardc
Flag: not_operational Exclude: No

Review Notes

Metadata Start Date End Date Comment
CE02SHSM-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

CE02SHSM-RID27-01-OPTAAD000

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

By Lori Garzio, on 6/28/19

CE02SHSM-RID27-01-OPTAAD000
Deployment: 6

56% of the 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