Dissolved Oxygen

Reference Designator
Review Status
Review Complete
240 to 2,592m
DOSTA (Dissolved Oxygen Stable Response)
Make / Model
Aanderaa / Optode 4330

Dataset Reviews Last processed: 8/1/19, 5:49 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_wfp 340 335 0 4 0 0 400,419 10 2573 / 2614 1 Complete
2 recovered_wfp 336 317 0 17 0 0 371,188 10 2592 / 2585 2 2 Complete
3 recovered_wfp 396 366 0 29 0 0 419,252 10 2573 / 2539 1 Complete
4 recovered_wfp 315 313 0 0 0 0 357,397 10 2573 / 2565 1 Complete
Data Ranges Review Images

Test Notes

  1. fail: check ['DO - Pressure Temp Sal Corrected']
  2. no other streams for comparison

Data Coverage

Deployment: 1234

Lat/Lon Differences (km)

Deployment: 1234
1 0.00
2 2.350.00
3 0.751.980.00
4 2.790.442.400.00

System Annotations

Metadata Start Date End Date Comment
6/28/16, 2:10 AM 7/15/16, 8:00 PM

Deployment 2: Profiler failed.

Id: 119 By: lgarzio
Flag: not_operational Exclude: No

7/12/17, 3:30 AM 8/10/17, 6:18 AM

Deployment 3: Profiler failed.

Id: 120 By: lgarzio
Flag: not_operational Exclude: No

12/31/19, 7:00 PM

Deployment 6: 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: 1888 By: cdobson

Review Notes

Metadata Start Date End Date Comment

Missing data at the end of deployment 4 should be annotated.

By Lori Garzio, on 8/5/19


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 8/5/19


The estimated_oxygen_concentration ranges shifted from around 300-360 umol L-1 in deployments 1-2 to 320-380 umol L-1 in deployments 3-4. A similar shift in DO data from GP02HYPM-WFP03-03-DOSTAL000 was observed between deployments 3 and 4 (see annotation ID 1444)

By Lori Garzio, on 8/5/19

New Note