.. UHDAS+CODAS documentation master file, created by sphinx-quickstart on Wed Jan 7 14:24:39 2009. You can adapt this file completely to your liking, but it should at least contain the root `toctree` directive. Electrical noise (deep biases) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This is really bad. This may indicates an acoustic or electrical source of bad "signal", ie. the ADCP erroneously identifies it as good; but it is not. Suggestions: run the instrument self-test, get in touch with RDI Field Service. It is difficult to troubleshoot this kind of problem. Another way to look at "bad data" is by noting where a failure in the ADCP components can occur. .. toctree:: :maxdepth: 2 .. image:: kn195_03_kn2009_025_14400.png :alt: ADCP data: electric noise (spurious signal) :scale: 50 ---- .. image:: kn195_03_kn2009_027_14400.png :alt: ADCP data: electric noise (spurious signal) :scale: 50 ---- .. image:: kn195_04_kn2009_074_00000.png :alt: ADCP data: electric noise (spurious signal) :scale: 50 ---- .. image:: os75bb_electricnoise.png :alt: ADCP data: electric noise (spurious signal) :scale: 50 ---- .. image:: os75nb_electricnoise.png :alt: ADCP data: electric noise (spurious signal) :scale: 50