USAGE:   
          prl2blq [options] {rad.prl|-} {east.prl|-} {north.prl|-} [out.blq]


PURPOSE:
          Converts the output protocol sheet (.prl) from urtapt into blq-form,
         
provided the wavegroup setup in urtapt corresponds to the 11 files in blq.
          Darwin's tide symbols must match exactly.
          If one to two input prl-file namea are not given but placeholders `-ยด,
          the blq-files will contain corresponding rows with zero amplitudes. 

OPTIONS:

 +s name  - site name, default from prl-file SITE/FILE record
            NB: Letters _V will be added for Value and
                letters _U will be added for Uncertainty.

 +s+ name - site long name = <n> + "Observed"
            else taken from prl-file name.

 +sl name - to assign a different long name for the site
            "Observed" will be added.

 +fn      - to read the newer 8-column prl format (Obs! not by default)
 +fl      - ... an older format.

 +o       - to overwrite output instead of append.

 +Sval    - multiply amplitudes with val.

 +dtval   - compensate for a delay of val hours.

 +pha[angle] or -pha[angle]
          - +pha to switch to positive phase = lag
            and to cut the circle at the specified angle.
            Default is positive phase = lead, cut at 180 degrees

 -lpph    - Due to urtapt's use of the negative of the Geodetic coefficient at
            n=2 m=0, i.e. it uses the Legendre P2 as in math.physics, the phase for
            these tides (in the long-period band) is corrected by adding 180 degrees.
            The option prevents this correction. 

 EXAMPLES:

     prl2blq +s HLFX +fn +o HLFX-nograd-2h.R.prl HLFX-nograd-2h.E.prl HLFX-nograd-2h.N.prl HLFX-obsrv.blq
recommended if result variants are saved in separate files.

     prl2blq +s HLFX +fn HLFX-nograd-2h.R.prl HLFX-nograd-2h.E.prl HLFX-nograd-2h.N.prl allsites.blq
for collecting many results in the same file.

     prl2blq +s HLFX -pha180. +dt-1. +o +fn HLFX-nograd-2h.R.prl HLFX-nograd-2h.E.prl HLFX-nograd-2h.N.prl HLFX-dt1h.blq
converts to oceanographer's phase (the prl-file was issued in a run without  Q_ocean=.true. in urtapt namelist)
and the input file to urtapt had a one-hour lead in the time stamps.
 

 OBS! the long command line and the order R E N of prl-files.