Hello,

I am trying to produce a feather plot using data from oceanic currents
(direction and magnitude), but I do not understand the formula. To retrieve
the data I used the program VmDas for the ADCP, and the output consists of
thousands of "ensembles" which are about 5 second intervals. Time is
divided into 3 separate columns in the data. Below I have attached a sample
of the data:

   Ens       HH MM SS HH.1 Dep Mag   Dir
1 5577 10:40:02 40  2    0 4.9 359 171.0
2 5578 19:40:06 40  6   67 4.9 201 158.0
3 5579 19:40:11 40 11   55 4.9 277  20.5
4 5580 19:40:18 40 18    5 4.9 337  41.3
5 5581 19:40:24 40 24   34 4.9 235  20.4
6 5582 19:40:30 40 30   84 4.9 246 191.5


Thank you for your help!
-- 
Justine
jdia014@gmail.com

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