Seawater pH

Reference Designator
CE01ISSM-MFD35-06-PHSEND000
Review Status
Review Complete
Note
Depth
25m
Class
PHSEN (Seawater pH)
Make / Model
Sunburst / SAMI-pH

Dataset Reviews Last processed: 1/2/19, 2:51 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 122 23 0 98 1 2 190 25 / 1 Complete
2 recovered_inst 185 86 0 60 8 41 1,747 25 / 1 Complete
3 recovered_inst 126 126 0 0 0 0 3,006 25 / 1 Complete
5 recovered_inst 138 138 0 0 0 0 3,292 3,600 24 / 2 2 1 Complete
6 recovered_inst 200 200 0 0 0 0 2,256 10,800 25 / 1 Complete
7 recovered_inst 177 177 0 0 0 0 1,876 10,800 25 / 1 Complete
8 recovered_inst 172 172 0 0 0 0 5,418 25 / 1 Complete
9 recovered_inst 181 181 0 0 0 0 3,559 25 / 1 Complete
Data Ranges Review Images

Test Notes

  1. missing: ['pressure']
  2. no other streams for comparison

Data Coverage

Deployment: 12356789
19%46%100%100%100%100%100%100%

Lat/Lon Differences (km)

Deployment: 12356789
1 0.00
2 0.000.00
3 0.080.080.00
5 0.080.080.000.00
6 0.180.180.170.170.00
7 0.240.240.220.220.390.00
8 0.170.170.160.160.010.380.00
9 0.170.170.180.180.340.100.330.00

System Annotations

Metadata Start Date End Date Comment
CE01ISSM
4/17/14, 4:45 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: 868 By: michaesm

CE01ISSM
8/7/16, 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.

Id: 869 By: michaesm
Flag: not_operational Exclude: No

CE01ISSM-MFD35
10/28/16, 8:00 PM 5/14/17, 8:00 PM

The file system on the SD card used by embedded Linux card comprising DCL35 became corrupted on Saturday, October 29, 2016. Affected instruments are: [ADCPT, PCO2W, PHSEN, PRESF, VEL3D]. All instruments are set to log internally. Will not receive telemetered data, but do not anticipate complete loss of data.

Id: 851 By: michaesm
Flag: not_available Exclude: No

CE01ISSM
12/11/16, 7:00 PM 5/30/17, 8:00 PM

On Monday, Mon Dec 12 15:30:00 2016, stopped receiving any data from CTDBP3. No indication as to possible cause.

Id: 870 By: michaesm
Flag: not_operational Exclude: No

CE01ISSM
2/5/17, 7:00 PM 4/30/17, 8:00 PM

The buoy and mfn battery voltages have been drawn down faster than expected. Have shutdown further power to DCL16, DCL17, CPM3, and DCL37 (DCL35 failed several weeks ago). This takes the following instruments offline:
DCL16
CTDBP + DOSTA (probably internally recording)
FLORTNUTNR (probably internally recording)
PHSEN (probably internally recording)
PCO2W (probably internally recording)
OPTAA
SPKIR
VELPT (probably internally recording)

DCL17
MOPAK
CTDBP + FLORT
VELPT (probably internally recording)
ACOMM
DCL35
ADCPT (probably internally recording)
PCO2W (probably internally recording)
PHSEN (probably internally recording)
PRESF (probably internally recording)
VEL3D (probably internally recording)
DCL37
CTDBP + DOSTA (probably internally recording)
OPTAA
ZPLSC (probably internally recording)

Id: 871 By: michaesm
Flag: not_available Exclude: No

CE01ISSM-MFD35
5/11/17, 8:00 PM 10/30/17, 8:00 PM

Lost communication with DCL35, on the MFN of CE01ISSM sometime after 2017/05/12 04:32:31.744. Reason unknown. Attempted to log into the system and establish both an ssh connection and a minicom session with no success. Minicom session showed zero activity, suggesting the system is completely offline. With the exception of the VEL3D, all instruments hosted by DCL35 are autonomous. No further data should be expected from: [ADCPT (recording internally), PRESF (recording internally), PC02W (recording internally), PHSEN (recording internally), VEL3D (status unknown)]

Id: 852 By: michaesm
Flag: not_available Exclude: No

CE01ISSM-MFD35-06-PHSEND000
Method: telemetered
Stream: phsen_abcdef_dcl_instrument
5/11/18, 8:30 AM 6/1/18, 7:30 AM

A review of the pH data and the signal and reference values suggests the system may have become blocked on May 11th through to June 1st. The blockage appears to have cleared, but the raw signal counts are still lower than ideal based upon the vendor documentation. Users should be cautious when using the data from this time period.

Id: 1470 By: wingardc
Flag: suspect Exclude: No

CE01ISSM-MFD35-06-PHSEND000
Method: telemetered
Stream: phsen_abcdef_dcl_instrument
12/15/18, 7:00 PM

The signal intensities for the PHSEN on the MFN have dropped well below the minimum level required by the manufacturer for a valid calculation of pH. All indications are that signal pathway has either fouled or become clogged with sediment. Resulting pH calculations should be considered suspect

Id: 1544 By: wingardc
Flag: suspect Exclude: No

CE01ISSM-MFD35
Method: telemetered
1/11/20, 1:45 PM

During a large storm event on 2020-01-11, the surface buoy and NSIF broke free and went adrift. As a result, telemetry from the data loggers and instrumentation on the seafloor platform has ceased. We expect the system to continue autonomous operations and hope to download data from the data loggers and instruments after the seafloor platform is recoverd in the spring of 2020.

Id: 1895 By: wingardc
Flag: not_available Exclude: No

Review Notes

Metadata Start Date End Date Comment
CE01ISSM-MFD35-06-PHSEND000

gaps at the end of deployments 1 and 2 are not annotated in the system.

By Leila Belabbassi, on 5/14/19

CE01ISSM-MFD35-06-PHSEND000
5/1/16, 12:00 AM 10/15/18, 12:00 AM

suspect data

By Leila Belabbassi, on 5/14/19

CE01ISSM-MFD35-06-PHSEND000
Deployment: 1

a gap of 2 days at the end of April 2014 in are not annotated in the system

By Leila Belabbassi, on 5/14/19

CE01ISSM-MFD35-06-PHSEND000
Deployment: 1
4/17/14, 12:00 AM 8/16/14, 12:00 AM

suspect data

By Leila Belabbassi, on 5/14/19

CE01ISSM-MFD35-06-PHSEND000
Deployment: 2

gaps seen between 20 Dec 2014 and 10 Feb 2015 are not annotated in the system.

By Leila Belabbassi, on 5/14/19

CE01ISSM-MFD35-06-PHSEND000
Deployment: 2
12/1/14, 12:00 AM 3/1/15, 12:00 AM

suspect data

By Leila Belabbassi, on 5/14/19

New Note