Noise in ADCP data from reflections off of shallow instruments on the mooring line
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Jacob Wenegrat and Patricia Plimpton who have previously worked with these ADCP data, 
noted that there was some noise in shallow bins due to reflections off of the 
instruments on the mooring line. 

Note that we have not applied any flagging to the ADCP data for these shallow 
noise issues.

In the paper by Wenegrat, et al (see pdf file in this directory), they write

"Several ADCP velocity bins were biased by sidelobe reflection off instruments on 
the mooring line. Corrupted bins were identified visually based on discontinuities 
in profiles of echo intensity and velocity and were removed from the data."

Jacob has provided a Matlab command file 

  createDataMask.m

included in this directory which can be used to apply the flagging he elected
to do. 

Note that Patricia Plimpton recommended a more limited flagging, so you may want to 
copy and modify this script to apply your own choice for flagging shallow data.

A description of the depths which were flagged is below, from Curran Fey who 
prepared the data files and README.txt in this directory. (Curran's email
address is curran.fey@noaa.gov).

He wrote:

"The Matlab code Jacob provided in "createDataMask.m" is not incompatible with 
the data I have produced..... Jacob's choices appear to go well beyond those 
suggested by Patricia..... The table below shows the depths flagged by Jacob 
for the entire deployment versus those suggested by Patricia:

  Flagged Depths
---------+---------
  Jacob  | Patricia
---------+---------
   5.02  |     5.02
   5.77  |     5.77
   6.52  |    
   9.52  |    
  10.27  |    
  11.77  |    11.77
  12.52  |    12.52
  13.27  |    
  15.52  |    
  16.27  |    16.27
  20.77  |    
  21.52  |    

I would also point out that in the code he first flags all of bin 4 (line 11) 
and then later flags only part of bin 4 (line 23). This leaves me uncertain 
of his intent.