Single Point Velocity Meter

Reference Designator
GI01SUMO-RID16-04-VELPTA000
Review Status
Review Complete
Note
Depth
12m
Class
VELPT (Single Point Velocity Meter)
Make / Model
Nortek / Aquadopp 300m

Dataset Reviews Last processed: 8/13/19, 5:03 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_host 347 197 0 149 0 0 18,736 12 / 13 1 Complete
2 recovered_host 340 294 0 0 1 46 10,319,447 1 12 / 13 2 Complete
3 recovered_inst 401 75 0 326 0 0 7,041 900 12 / 13 Complete
4 telemetered 314 69 0 244 0 0 6,491 900 12 / 13 3 3 Complete
Data Ranges Review Images

Test Notes

  1. fail: data found in another stream (gaps: [1] days: [28])
  2. pass unique test - ascending not tested
  3. no other streams for comparison

Data Coverage

Deployment: 1234
22%
57%86%
19%

Lat/Lon Differences (km)

Deployment: 1234
1 0.00
2 5.690.00
3 0.376.040.00
4 1.395.601.390.00

Example Composite Data Plot

System Annotations

Metadata Start Date End Date Comment
GI01SUMO-RID16-04-VELPTA000
9/10/14, 2:50 PM

According to the manufacturer, data are suspect when the instrument is tilted more than 20 degrees (measured by pitch and roll).

Id: 822 By: lgarzio

GI01SUMO-RID16-04-VELPTA000
9/10/14, 2:50 PM 8/22/15, 7:00 AM

Deployment 1: Recovered_instrument data not available - instrument did not log internally.

Id: 620 By: lgarzio

GI01SUMO
2/14/15, 7:00 PM 8/21/15, 8:00 PM

Deployment 1: Status data sent from the buoy included leak detects in the buoy well, drop in battery voltage, and loss of wind turbine input. Upon recovery, the buoy was primarily intact but several instruments were damaged and/or missing. Ice build-up on the tower is speculated to be the cause for much of the damage. No telemetered or recovered_host data expected. Functional instruments could continue to collect data using internal battery power and storage cards.

Id: 46 By: lgarzio

GI01SUMO-RID16-04-VELPTA000
8/15/15, 3:22 PM 7/18/16, 8:00 PM

Deployment 2: Recovered_instrument data not available - instrument did not log internally.

Id: 621 By: lgarzio

GI01SUMO
1/26/16, 7:00 PM 7/18/16, 8:00 PM

Deployment 2: A period of violent weather caused power outages on multiple instruments. No telemetered or recovered_host data expected. Functional instruments could continue to collect data using internal battery power and storage cards. Upon recovery, the buoy well was flooded.

Id: 47 By: lgarzio

GI01SUMO-RID16-04-VELPTA000
9/21/16, 9:05 PM 8/14/17, 5:33 AM

Deployment 3: Instrument failed.

Id: 476 By: lgarzio
Flag: not_operational Exclude: No

GI01SUMO
12/26/16, 7:00 PM 4/6/17, 8:00 PM

Deployment 3: Wind turbines were disabled due to evidence of ice build-up on the surface buoy tower. The platform's battery charge state declined steadily. As of 2017-01-15, all DCLs were shut down and the telemetry schedule was reduced to conserve power. Battery-powered instruments should continue to collect data. UPDATE 2017-04-07: With increasing daylight at this location, sufficient power was generated by solar panels to re-establish limited high-bandwidth telemetry and data transmission. UPDATE: at recovery, wind turbines were missing their hubs and blades, and one solar panel was missing.

Id: 121 By: lgarzio

GI01SUMO
8/5/17, 2:17 PM 6/14/18, 4:02 AM

Deployment 4: at 10:03 UTC on 12 October 2017 the Irminger Sea Surface Mooring stopped all communications. At recovery, the surface buoy was missing. The subsurface portion of the mooring had fallen to the seafloor and was recovered. CTDMOs, CTDBP-F, DOSTA, and ADCP instrumentation were full ocean depth rated and survived, although any recovered data available after 2017-10-12T10:03:00 are suspect. All other instrumentation imploded or flooded. The cause for the loss of the buoy is inconclusive.

Id: 102 By: lgarzio

GI01SUMO
6/19/19, 8:00 PM

Deployment 5: Battery voltage dropped below 24V. All DCLs were turned off. CPM1 was placed on a wake schedule. Data collection and telemetry will be irregular until voltage rebounds.

Id: 1625 By: cdobson

GI01SUMO
Method: telemetered
10/21/19, 8:00 PM

Deployment 6: *UPDATED 2020-04-27: As of 2020-02-21 data for most instruments are being telemetered again (via Iridium). A gap in telemetered data is expected between 2019-10-22 and 2020-02-21 and will not be backfilled but these data will be available upon recovery.*Both fleet broadband units have failed and no more telemetered data is expected at this time. Instruments are believed to be operating as normal and their data will be available upon recovery.

Id: 1743 By: cdobson

Review Notes

Metadata Start Date End Date Comment
GI01SUMO-RID16-04-VELPTA000

The sampling rate for deployment 2 is 1 Hz, where for every other deployment there is 1 sample taken every 15 minutes. This should be annotated to explain why the sampling rates are so different.

By Lori Garzio, on 8/15/19

GI01SUMO-RID16-04-VELPTA000
Deployment: 1

There is about 1 month during deployment 1 where telemetered data are available and recovered_host data are not available. This should be investigated. 2015-06-03T18:35:56 to 2015-07-06T18:07:03

By Lori Garzio, on 8/15/19

GI01SUMO-RID16-04-VELPTA000
Deployment: 2

12% of upward_velocity values for deployment 2 are outside of global ranges.

By Lori Garzio, on 8/15/19

GI01SUMO-RID16-04-VELPTA000
Deployment: 2
8/15/15, 7:22 PM 7/19/16, 12:00 AM

The velocity range for deployment 2 is substantially higher compared to the other 3 deployments.

By Lori Garzio, on 8/15/19

GI01SUMO
Deployment: 4
10/12/17, 12:00 AM 6/14/18, 8:02 AM

The surface buoy detached from the mooring and the subsurface portion of the mooring fell to the seafloor (see annotation ID 102). Excluding all mooring data for this time range from final statistics.

By Lori Garzio, on 1/15/19

New Note