Reference Designator
Start Depth
End Depth
Near Surface Instrument Frame
Current Status
Review Complete
OPTAA (Absorption Spectrophotometer)
Science Discipline
WET Labs
M2M Example
Method Data Stream Content Type
recovered_host optaa_dj_dcl_instrument_recovered Data Products Report M2M Stats Science
recovered_host optaa_dj_dcl_metadata_recovered Metadata Report M2M Engineering
telemetered optaa_dj_dcl_instrument Data Products Report M2M Stats Science
telemetered optaa_dj_dcl_metadata Metadata Report M2M Engineering
Deployment Cruise Start Date Stop Date Mooring Asset Node Asset Sensor Asset Latitude Longitude Deployment Depth Water Depth
1 Review OC1503D 04/02/2015 09/22/2015 CGMCE-02SHSM-00001 CGINS-OPTAAD-00174 44.6383 -124.304 7 80
2 Review OC1510A 10/07/2015 05/16/2016 CGMCE-02SHSM-00002 CGINS-OPTAAD-00135 44.6354 -124.303 7 82
3 Review TN-342 05/17/2016 09/28/2016 CGMCE-02SHSM-00003 CGINS-OPTAAD-00267 44.6357 -124.304 7 80
4 Review AT37-03 09/26/2016 04/22/2017 CGMCE-02SHSM-00004 CGINS-OPTAAJ-00168 44.6393 -124.304 7 80
5 Review SKQ201704S 04/20/2017 10/15/2017 CGMCE-02SHSM-00005 CGINS-OPTAAD-00170 44.6358 -124.304 7 81
6 Review SKQ201715S 10/10/2017 04/04/2018 CGMCE-02SHSM-00006 CGINS-OPTAAD-00154 44.6393 -124.304 7 80
7 Review SKQ201808S 04/03/2018 09/25/2018 CGMCE-02SHSM-00007 CGINS-OPTAAD-00258 44.6357 -124.304 7 80
8 Review SR1813 09/22/2018 04/21/2019 CGMCE-02SHSM-00008 CGINS-OPTAAJ-00139 44.6395 -124.301 7 80
9 Review SKQ201910S 04/19/2019 10/22/2019 CGMCE-02SHSM-00009 CGINS-OPTAAD-00315 44.6356 -124.304 7 80
10 Review SKQ201921S 10/20/2019 CGMCE-02SHSM-00010 CGINS-OPTAAD-00127 44.6396 -124.303 7 80
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: 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

Metadata Start Date End Date Comment
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

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

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

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

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