Teledyne RD Instruments Workhorse Sentinel 300khz vs SeaWATCH 300kHz - Shallow Water

October 31, 2018

This is a shallow water comparsion between a Teledyne RD Instruments Workhose Sentinel 300khz ADCP and a Rowe Technologies Inc. SeaWATCH 300kHz ADCP. Both are equipped with 4 beams.

Teledyne RD Instruments Workhorse Sentinel 300khz

VS

Rowe Technologies Inc SeaWATCH 300kHz

Location

Shallow water location: Busan, South Korea

Installation

Typical Trawl Resistant Bottom Mount (TRBM) Photo courtesy Deep Ocean Buoyancy

Setup

All systems were programmed identically
  • Ping times were offset to prevent interference.
  • 10 minute ensembles, 60 pings, 1Hz ping rate.
  • One meter bins.
  • Both systems deployed on common depth gradient line.
  • Deployed in a trawl resistant bottom mount.
  • Default screening thresholds were used.

Results

Stick Vector Plots

Stick Vector Plots show a comparison time series at four individual depths. Data is consistent system to system showing that both systems are making the identical measurements in direction and magnitude. Tidal action is demonstrated by both data sets.

Speed and Direction at 3 meters

Speed and Direction at 5 meters

Speed and Direction at 10 meters

Speed and Direction at 14 meters

Conclusion

Overlaid Speed and direction time series plots show a direct comparison at an individual depth. In these plots it can be observed that the systems are very close in the measurements to be considered brother and sister data points. Data is consistent system to system, and depth to depth, in direction and magnitude. Tidal action is demonstrated by both data sets.

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