I've never used a signature 1000 before, and I'm trying to set it up to measure currents, waves, and turbulence in 15 m of water. I'll deploy it near the bed, upward looking, for about 3 weeks; I expect currents at that site will reach 1.5 m/s.
I *think* that the way I want to set it up is in the "waves and burst using 5 beams" single plan, with the HR mode enabled. I plan to get turbulence using the Stacey method (that 1999 JGR paper) from the along-beam velocities, and waves from the vertical beam.
So, will the HR mode add additional turbulence information? What are the limitations on that mode? I understand what you've posted:
|Velocity range||3 cm/s - 1.4 m/s|
|Cell size||2-25 cm|
|Profiling range||10 cm - 8 m|
|Range velocity limitations||Product of profiling range and velocity should not exceed 3.0 m2/s.|
But, I've heard that noise is high when the cell size is small, and it can only reach 1/2 of the way to the surface. Could you offer some tips as to how to get good turbulence data from this part of the instrument? And is there any guidance on comparing the stacey method using 4 beams, and the HR beam method?
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