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WERA Radial Components on a Cartesian Grid

Each file contains all information required to describe a radial current map.
  The file name is encoded in yyyydddhhmm_ccc.rad_lst with
    yyyy = 2002        (year, 1999, 2002)
     ddd = 032 ... 092 (day within the year, e.g. 01-Feb to 31-Mar)
      hh =  00 ...  23 (hour)
      mm =  00 ...  59 (minutes)
     ccc = nic         (code for experiment, e.g. nic = Nice)
     cur = cur / wav   (cur indicating data set for 'currents')
                       (wav indicating data set for 'waves')

  The time is given in UTC and indicates the starting time
  of the measurement.
The structure within the file is as follows (example from the EuroROSE Gijon experiment):
29-NOV-2000 14:05 UTC  Cabo-Penas     43.65667 N     5.84167 W CIT=   532 sec

 LAT(1,1)   LON(1,1)  DGT[km]   NX   NY
---------------------------------------
 44.09666   -5.86667    1.000   60   60

    1371
 IX  IY  Vel. [m/s]  Acc. [m/s]  Var. [m/s]   Power
------------------------------------------------------------
  4  47     0.28186     0.02824     0.16467   0.24818835E+11
  4  48     0.30255     0.02564     0.14953   0.94194655E+11
  4  49     0.33084     0.02209     0.12882   0.27548581E+14
  4  50     0.11004     0.01262     0.07358   0.83063981E+13
  5  43     0.52688     0.02511     0.14640   0.10013001E+10
....
  The first line gives:
     date/time of the start of the measurement, 
     name of the site, 
     LAT / LON of site,
     and if ' CIT=' exists, the coherent integration time.

  The next line is empty.

  The next three lines give the description of the measurement grid
     followed by the actual values:
     LAT(1,1), LON(1,1) -- upper left corner of the grid in degrees
                           West, South -> negative values
     DGT[km]            -- grid spacing in LAT and LON direction in kilometers
     NX                 -- number of grid points in East direction
     NY                 -- number of grid points in South direction
     FORMAT(x,f9.5,x,f10.5,f9.3,2(x,i4))

  The next line is empty.

  The next line gives the number N of data lines in the file to
     follow after the description lines.
     FORMAT(x,i8)

  The next two lines decribe the parameters of the following
  N data lines:
     IX         East count of measurement grid
     IY         South count of measurement grid
     Vel.[m/s]  Radial component of the surface current
     Acc.[m/s]  Accuracy of the radial component of the surface current
     Var.[m/s]  Variance of the radial component of the surface current
     Power      Relative power 
     FORMAT(X,I3,X,I3,3(X,F11.5),2X,E15.8)

Look here to find out how accuracy and variance of the radial current vectors are calculated.

Grid points with missing measurement values due to a change in working range of the radar or influence of noise are omitted.


Comments to: gurgel@ifm.uni-hamburg.de (Klaus-Werner Gurgel)