SNR and correlation for QC on Continental adcp data

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SNR and correlation for QC on Continental adcp data

Posted by zoi kokkini at Friday 15:39

Dear all,

we have a continental adcp on a mooring, and we need to go on with quality control procedures of the data.

I have read a lot on the manuals and forum, and everyone is referring to the SNR and the correlation values for that, together with the tilting angle.

But I cannot find the formula to calculate the SNR. If I understand right, we need to use the amplitude (in counts) stored in the .a1 .a2 and .a3 files and convert them to dB, but I cannot find the right formula for that — the same for the correlation.

Regarding the tilt, in the .sen files, we have heading, roll, and pitch. How I can pass from these to the tilt angle

Our Continental is set up on ENU, so no Transformation is needed, I suppose.

Any help is more than welcome.

Thank you in advance.

Zoi

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