Dissolved Oxygen

Reference Designator
Start Depth
End Depth
Wire Following Profiler Body
Current Status
Review Complete
DOSTA (Dissolved Oxygen Stable Response)
Science Discipline
Optode 4330
M2M Example
Method Data Stream Content Type
recovered_wfp dosta_ln_wfp_instrument_recovered Data Products Report M2M Stats Science
telemetered dosta_ln_wfp_instrument Data Products Report M2M Stats Science
Deployment Cruise Start Date Stop Date Mooring Asset Node Asset Sensor Asset Latitude Longitude Deployment Depth Water Depth
1 Review MV1309 07/26/2013 06/14/2014 CGMGP-02HYPM-00001 CGVEH-GWFPGX-77401 CGINS-DOSTAL-01106 50.0707 -144.798 4061 4219
2 Review MV1404 06/22/2014 06/02/2015 CGMGP-02HYPM-00002 CGVEH-GWFPGX-10402 CGINS-DOSTAL-01480 50.0783 -144.805 4038 4219
3 Review TN323 06/04/2015 07/01/2016 CGMGP-02HYPM-00003 CGVEH-GWFPGX-10403 CGINS-DOSTAL-01478 50.0798 -144.803 4070 4219
4 Review RB1605 07/03/2016 07/16/2017 CGMGP-02HYPM-00004 CGVEH-GWFPGX-93602 CGINS-DOSTAL-01086 50.0796 -144.806 4062 4220
5 Review SR1710 07/15/2017 07/26/2018 CGMGP-02HYPM-00005 CGVEH-GWFPGX-10403 CGINS-DOSTAL-01478 50.1156 -144.918 4063 4230
6 Review SR1811 07/22/2018 09/26/2019 CGMGP-02HYPM-00006 CGVEH-GWFPGX-93602 CGINS-DOSTAL-01086 50.0686 -144.798 4063 4222
7 Review SKQ201920S 09/26/2019 CGMGP-02HYPM-00007 CGVEH-GWFPGX-10403 CGINS-DOSTAL-01478 50.1152 -144.916 4063 4237
Metadata Start Date End Date Comment

I submitted a helpdesk question on 11/12/2018 regarding an offset between recovered and telemetered data for all global HYPMs: "There appears to be a substantial offset between data with the same timestamps from recovered_wfp and telemetered methods for all deployments of all global WFP CTDs, and I have included information from two representative deployments of two different profilers as examples. It looks like the values recorded for the first common timestamp are exactly the same, and as the profiler moves along in time the offset between the values recorded for the same timestamp become increasingly more offset. Then, the profiler reaches the end of the profile (either at its shallowest or deepest point), resets, and the pattern begins again. This is most easily seen in the pressure data, but there is an offset for all science parameters.

GI02HYPM-WFP02-04-CTDPFL000 deployment 1
GP02HYPM-WFP02-04-CTDPFL000 deployment 3

The *_intersect.csv files attached contain data where recovered and telemetered timestamps intersect. For each timestamp and science parameter there are recorded values (from .nc files downloaded from the system) and the difference. For each parameter, the difference between the values at the bottom and top of the profiler's range are exactly zero, and (particularly for pressure) the differences steadily increase until they are reset at zero at the bottom/top of the profile. This pattern continues throughout the deployment. The plots attached are zoomed in to one upcast and one downcast, and highlight the offset in the data between the two methods."

Redmine 13743

By Lori Garzio, on 8/8/19

7/3/16, 2:05 AM 7/26/18, 10:15 PM

Deployments 4 and 5 don't have deployment depths defined in asset management.

By Lori Garzio, on 1/3/19

Deployment: 2

No data expected - profiler failed (annotation ID 715).

By Lori Garzio, on 8/7/19

Deployment: 2
6/16/14, 2:15 AM 6/22/14, 12:00 PM

Excluding data from the beginning of deployment 2 from the final statistics as the mooring was recovered and re-deployed (annotation ID 580)

By Lori Garzio, on 1/3/19

Deployment: 3

The estimated_oxygen_concentration values at the bottom of the WFP02 range and the top of the WFP03 are offset for this deployment. This is consistent with the observation that deployment 3 data for WFP03 could be suspect (see annotation ID 1444).

By Lori Garzio, on 8/7/19

Deployment: 5
7/15/17, 9:25 PM 7/26/18, 10:15 PM

The mooring was deployed 9 - 10 km from the location of the previous 4 deployments of this mooring. If this location is correct, the platform should be annotated to inform the users as to why the deployment location changed.

By Lori Garzio, on 1/2/19

New Note

Metadata Start Date End Date Comment
7/26/13, 11:02 AM 7/16/17, 2:04 AM

There is a substantial change in dissolved oxygen measurements reported by this instrument between deployments 3 and 4. A Subject Matter Expert compared the profiler data to data from the most recent U.S. GO-SHIP occupation of P16N (2015) and suggested that data from deployment 3 are suspect (the external dataset more closely aligns with data from deployment 4). Additionally, profiler data from deployment 1 more closely resemble data from deployment 3, so those data are also suspect. We have not independently verified the analysis, investigation is pending (Redmine 13505).

Id: 1444 By: lgarzio

6/20/14, 11:28 PM 6/21/14, 10:14 PM

Deployment 2: Platform was deployed on 6/16/2014, recovered on 6/21/2014 at 03:28 UTC due to firmware issue and re-deployed with updated firmware on 6/22/2014 at 02:14 UTC

Id: 580 By: lgarzio
Flag: not_operational Exclude: No

4/5/15, 1:46 AM 6/1/15, 8:00 PM

Deployment 2: Profiler failed due to depleted battery.

Id: 715 By: lgarzio

7/15/17, 5:25 PM 7/26/18, 6:15 PM

Deployment 5: Telemetered data are not available for this deployment because gliders were not deployed.

Id: 140 By: lgarzio

12/31/19, 7:00 PM

Deployment 7: Due to a clock rollover issue, all WFPs have ceased sampling on 1/1/2020. No WFP data are being collected after this date. A resolution is being researched by the vendor.

Id: 1887 By: cdobson