Direct Covariance Flux

Reference Designator
Start Depth
End Depth
Buoy Tower
Current Status
FDCHP (Direct Covariance Flux)
Science Discipline
M2M Example
Method Data Stream Content Type
recovered_host fdchp_a_dcl_instrument_recovered Data Products Report M2M Stats Science
recovered_inst fdchp_a_instrument_recovered Data Products Report M2M Stats Science
telemetered fdchp_a_dcl_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 KN-221-4 09/10/2014 08/22/2015 CGMGI-01SUMO-00001 CGINS-FDCHPA-41004 59.9337 -39.4738 -5 2685
2 Review AT-30-01 08/15/2015 07/19/2016 CGMGI-01SUMO-00002 CGINS-FDCHPA-44903 59.9436 -39.5737 -5 2668
3 Review AR-07-01 07/10/2016 08/14/2017 CGMGI-01SUMO-00003 CGINS-FDCHPA-33908 59.9341 -39.4673 -5 2691
4 Review AR21 08/05/2017 06/14/2018 CGMGI-01SUMO-00004 CGINS-FDCHPA-64402 59.9462 -39.4737 -5 2659
5 Review AR30-03 06/08/2018 CGMGI-01SUMO-00005 CGINS-FDCHPA-71403 59.9329 -39.4655 -5 2693

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New Note

Metadata Start Date End Date Comment
9/10/14, 2:50 PM 7/18/16, 8:00 PM

Sonic temperature bugs: general slow response problem leading to errors of +/- 6 degrees from ambient, and an additional nonlinear error in the slow response when the ambient temperature is between -5 and 5 degrees. The fast response (> 1 Hz) of these sensors is still accurate. Therefore, flux measurements using the detrended temperature data should still be valid. w bug: positive vertical velocities w output by the anemometer need to be multiplied by 1.166; negative vertical velocities need to be multiplied by 1.289 (Redmine 11645)

Id: 73 By: lgarzio

Method: telemetered
Stream: fdchp_a_dcl_instrument
9/10/14, 2:50 PM

The telemetered FDCHP data contains an onboard processing error that makes the motion-corrected wind speed and flux data unusable. The instrument subject matter expert is being consulted, and the algorithms are under review. Only the processed, recovered data should be used. For further questions please email

Id: 1375 By: m.vardaro
Flag: fail Exclude: Yes

9/10/14, 2:50 PM 8/22/15, 7:00 AM

Deployment 1: Recovered_instrument data not available - instrument was lost.

Id: 624 By: lgarzio

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

8/15/15, 3:22 PM 7/18/16, 8:00 PM

Deployment 2: No recovered_instrument data available for this deployment.

Id: 1399 By: lgarzio

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

Method: recovered_inst
Stream: fdchp_a_instrument_recovered
7/10/16, 1:44 PM

There are errors in the calculations of the recovered_instrument L1 and L2 data products (motion-corrected wind speeds, sonic temperature, and flux data products). This issue is under investigation (Redmine 13402).

Id: 1396 By: lgarzio

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

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

6/8/18, 1:21 PM

Deployment 5: Instrument damaged during deployment.

Id: 1449 By: lgarzio