3-D Single Point Velocity Meter

Reference Designator
Start Depth
End Depth
Wire Following Profiler Body
Current Status
Review Complete
VEL3D (3-D Single Point Velocity Meter)
Science Discipline
Falmouth Scientific
M2M Example
Method Data Stream Content Type
recovered_wfp vel3d_l_wfp_instrument_recovered Data Products Report M2M Stats Science
recovered_wfp vel3d_l_wfp_metadata_recovered Metadata Report M2M Engineering
telemetered vel3d_l_wfp_instrument Data Products Report M2M Stats Science
telemetered vel3d_l_wfp_sio_mule_metadata Metadata Report M2M Engineering
Deployment Cruise Start Date Stop Date Mooring Asset Node Asset Sensor Asset Latitude Longitude Deployment Depth Water Depth
1 Review AT26-30 03/16/2015 11/15/2015 CGMGA-02HYPM-00001 CGVEH-GWFPGX-10404 CGINS-VEL3DL-01110 -42.9817 -42.4985 2573 5200
2 Review NBP1510 11/16/2015 06/01/2016 CGMGA-02HYPM-00002 CGVEH-GWFPGX-45203 CGINS-VEL3DL-01255 -42.9808 -42.5419 2573 5196
3 Review NBP1609 10/29/2016 01/11/2018 CGMGA-02HYPM-00003 CGVEH-GWFPGX-10405 CGINS-VEL3DL-01116 -42.9781 -42.4957 2574 5189
Metadata Start Date End Date Comment

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 8/2/19


Missing 3 months of data at the end of deployment 3 should be annotated.

By Lori Garzio, on 8/2/19

Deployment: 2
5/23/16, 12:00 AM 11/5/16, 12:00 AM

Modify annotation ID 130 to indicate the time the mooring fell. According to the pressure data from the CTDMO, the mooring began to fall around 5/23/2016. Excluding data from final statistics.

By Lori Garzio, on 1/3/19

New Note

Metadata Start Date End Date Comment
11/16/15, 1:36 PM 1/11/18, 10:09 AM

Deployments 2 and 3: Data were not transmitted via satellite telemetry.

Id: 374 By: lgarzio

11/16/15, 1:36 PM 11/4/16, 8:00 PM

Deployment 2: At the initial recovery attempt of this mooring in Nov 2016, it was determined that the mooring had fallen and was not recovered. During the following cruise in Jan 2018, the mooring was successfully recovered on 2018-01-15T09:30:00.

Id: 130 By: lgarzio