Dissolved Oxygen

Reference Designator
CE06ISSM-RID16-03-DOSTAD000
Review Status
Review Complete
Note
Depth
7m
Class
DOSTA (Dissolved Oxygen Stable Response)
Make / Model
Aanderaa / Optode 4831

Dataset Reviews Last processed: 3/27/19, 7:35 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_inst 186 149 0 36 0 0 19,975 600 7 / 7 1 2 Complete
2 recovered_inst 187 187 0 0 0 0 17,933 900 7 / 7 2 Complete
3 recovered_inst 207 207 0 0 0 0 19,744 900 7 / 7 2 Complete
4 recovered_inst 142 68 0 74 0 0 6,317 7 / 7 3 2 Complete
5 recovered_inst 201 201 0 0 0 0 19,189 900 7 / 7 2 Complete
6 recovered_inst 176 132 0 44 0 0 12,522 7 / 7 4 2 Complete
7 recovered_inst 175 175 0 0 0 0 16,681 900 7 / 7 2 Complete
8 recovered_host 177 176 0 0 0 0 2,107 7 / 8 5 Complete
Data Ranges Review Images

Test Notes

  1. fail: data found in another stream (gaps: [1] days: [36, 38])
  2. no comparison: timestamps do not match
  3. fail: data found in another stream (gaps: [1] days: [4])
  4. fail: data found in another stream (gaps: [1] days: [13])
  5. fail: data found in another stream (gaps: [1] days: [1])

Data Coverage

Deployment: 12345678
99%
80%100%100%48%100%75%100%

Lat/Lon Differences (km)

Deployment: 12345678
1 0.00
2 1.630.00
3 1.860.260.00
4 2.070.440.240.00
5 1.900.280.080.170.00
6 1.960.330.120.130.060.00
7 2.010.390.160.090.110.060.00
8 1.880.360.160.340.230.230.250.00

Example Composite Data Plot

System Annotations

Metadata Start Date End Date Comment
CE06ISSM-RID16-03-DOSTAD000
10/7/14, 3:45 PM 3/28/18, 12:14 PM

Prior to the use of UV lamps for biofouling mitigation, this sensor would routinely biofoul after the first 6-8 weeks of a deployment (more common during a spring/summer deployment). Users should carefully examine the data to determine if biofouling has begun to dominate the signal.

Id: 2128 By: wingardc
Flag: suspect Exclude: No

CE06ISSM
10/7/14, 3:45 PM 9/30/16, 8:00 PM

All of the inshore surface moorings suffer from an issue called the 'top of the day problem.' A race condition exists in the CPM firmware when transferring daily log files harvested from the various sub-components in a buoy system (e.g. DCL16, CPM3, DCL35, etc) over the Iridium RUDICS connection. The primary CPM rsync's data files from the various sub-components to a central data directory. The first time a daily file is created/copied into that directory (usually shortly after midnight), a compressed copy of the file is created and that compressed file is queued up in a separate text file for transmission to shore. The transfer routine reads that text file and processes the files from that list in order from top to bottom. Once that compressed file is transferred to shore, no further updates for that file are sent to shore. Meanwhile, the CPM continues to rsync data from the different sub-components, updating the original daily log file. The net result is that data is accumulating in the daily log file for an instrument, but we may see only one record (or none) depending on when the rsync job occurred and the compressed file was created and staged for transfer to shore. This affects telemetered data only.

Id: 897 By: michaesm

CE06ISSM
7/26/16, 8:00 PM 10/3/16, 8:00 PM

Correcting the iridium data telemetry issues, permitting full telemetry of data files, resulting in greater power consumption than anticipated. Result is power level of the battery pack has dropped below operational limits and subsystems can no longer power instruments. Shutting the mooring down, and placing in a low power maintenance mode. 11 instruments offline.

Id: 898 By: michaesm
Flag: not_operational Exclude: No

CE06ISSM
12/31/16, 7:00 PM 4/22/17, 8:00 PM

The buoy main battery voltage is being drawn down faster than expected. Have shutdown further power to DCL17 and to the OPTAA on DCL16. This takes the following instruments offline:
DCL17
MOPAK
CTDBP (with attached FLORT)
VELPT
ACOMM
OPTAA
Have had to power off DCL17 and DCL16 and reduce call in frequency to 12 hours. Will still (at least should) receive data from MFN. Instruments affected are:
DCL17 (Buoy)
MOPAK
CTDBP3 (with FLORT)
VELPT1
UCSPP (aka ACOMM)
DCL16 (NSIF)
CTDBP1 (with DOSTA) (should internally log)
FLORT
PCO2W1 (should internally log)
PHSEN1 (should internally log)
OPTAA1
NUTNR (should internally log)
SPKIR
VELPT2 (should internally log)

Id: 899 By: michaesm

CE06ISSM
10/2/17, 8:00 PM 3/2/18, 3:44 AM

CAMDS not serviced by vendor in time for deployment

Id: 1236 By: michaesm
Flag: not_operational Exclude: No

CE06ISSM-RID16-03-DOSTAD000
3/28/18, 12:14 PM

The use of UV lamps has been implemented for biofouling mitigation on this instrument as of 2018-03-28T16:14:00Z.

Id: 2114 By: wingardc

CE06ISSM-RID16-03-DOSTAD000
7/13/19, 8:00 PM 10/12/19, 4:18 PM

UPDATED, 2019-10-12: Upon recovery, confirmed that the sensor was heavily biofouled. Data from July 14th through the end of the deployment should not be used. *Beginning around July 14th, the dissolved oxygen data at 7 m declined to approximately 2 umol/L by July 26th, where it remained until August 11. This instrument appears to have either failed, been damaged or biofouled (most likely) to the point where the dissolved oxygen data is no longer considered useable.

Id: 1702 By: wingardc
Flag: fail Exclude: No

Review Notes

Metadata Start Date End Date Comment
CE06ISSM-RID16-03-DOSTAD000

Deployments 1, 4, and 6: The missing data in the recovered_inst stream are found at the end of the record in both the telemetered and recovered_host streams.

Deployments 1, 2, 3, 4, 5, 6 and 7: The timestamps do not match exactly when comparing streams of different methods. Overlapping the data in a plot will hardly show the difference.

Deployments 2, 4, 6, and 8: Invalid data represent data outside global ranges [0 - 400 µmol/Kg] : There are values greater than 400 and less than 0 in the data.

By Leila Belabbassi, on 12/14/18

CE06ISSM-RID16-03-DOSTAD000

Deployments 1 and 6: Data gaps and the end of the deployment are not annotated in the system.

By Leila Belabbassi, on 12/17/18

CE06ISSM-RID16-03-DOSTAD000
9/1/15, 12:00 AM 11/15/15, 12:00 AM

The DO values at the end of deployment 2 are 50-100 umol kg-1 and jump to ~250 umol kg-1 at the beginning of deployment 3. Further analysis should be done using shipboard bottle data, which is outside the scope of this project.

By Lori Garzio, on 3/29/19

CE06ISSM-RID16-03-DOSTAD000
3/1/17, 12:00 AM 5/15/17, 12:00 AM

The DO values at the end of deployment 5 are 1502100 umol kg-1 and jump to 300-350 umol kg-1 at the beginning of deployment 6. Further analysis should be done using shipboard bottle data, which is outside the scope of this project.

By Lori Garzio, on 3/29/19

CE06ISSM-RID16-03-DOSTAD000
Deployment: 8

Why are recovered-inst data not in the system?

The missing data in the recovered_host stream are found at the end of the record in the telemetered stream.

By Leila Belabbassi, on 12/17/18

New Note