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 AT26-29 02/19/2015 12/25/2015 CGMGS-02HYPM-00001 CGVEH-GWFPGX-10407 CGINS-DOSTAL-01479 -54.4683 -89.3684 4402 4650
2 Review NBP1511 12/15/2015 12/11/2016 CGMGS-02HYPM-00002 CGVEH-GWFPGX-45202 CGINS-DOSTAL-02195 -54.4701 -89.24 4341 4515
3 Review NBP1610 11/30/2016 12/01/2017 CGMGS-02HYPM-00003 CGVEH-GWFPGX-10406 CGINS-DOSTAL-01475 -54.4693 -89.3191 4335 4583
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


The estimated_oxygen_concentration values shift substantially from deployment 1 (165-200 umol/L) to deployment 3 (200-235 umol/L) - DO shouldn't change that much at that depth. A similar shift in DO data between deployments 3 and 4 for GP02HYPM-WFP03-03-DOSTAL000 was observed by a SME (see annotation ID 1444). This should be investigated.

By Lori Garzio, on 8/8/19

Deployment: 2

Suspect data - instrument appears to have failed halfway through the deployment

By Lori Garzio, on 8/8/19

New Note

Metadata Start Date End Date Comment
2/19/15, 6:00 PM 12/25/15, 7:50 AM

Deployment 1: Due to delays on deck during deployment, the profiler's first dive began before the anchor was dropped. Once the dive started, the winch roller engaged and the profiler began its descent, which in this case meant winching back toward the boat/anchor. This may have damaged the winch mechanism or started the profiler into a non-standard deployment mode. The upper profiler (WFP02) indicated an error condition upon recovery, and a large number of profiles failed to log any CTD data. The lower profiler's battery voltage dropped rapidly near profile 300, which appears to have slowed down the profiling speed and increased the profile duration.

Id: 750 By: lgarzio

11/30/16, 2:29 PM 12/1/17, 7:01 AM

Deployment 3: The lower profiler was lost during the mooring recovery attempt. Recovered data from the main controller were processed, rather than from the profiler (as is customary).

Id: 373 By: lgarzio

11/30/16, 2:29 PM 12/1/17, 7:01 AM

Deployment 3: Data were not transmitted via satellite telemetry.

Id: 377 By: lgarzio