USAGE:
        blq-displacements [options] -{r|e|n} <SITE> <blq-file>
 
 PURPOSE:
            Retrieve ocean loading coefficients, selecting
            component, site and blq-file.
 
            -r -e -n  or  -ren (or permutations):
            Select one or more components;
            however, the order in output is always
            radial, east, north
 
            The standard format for output is e.g.
               Site SITEC
               File GOT00.2q/tangtest.blq
                 M2 '( 33.320,  33.9)'
                 S2 '( 10.600,  54.3)'
                 N2 '(  7.140,  20.6)'
            ...
 
 OPTIONS:
   -q    - quiet with Site and File; print only results.
 
   -b    - write out only amplitude and phases, no decoration at all.
   -s    - like -b but prepend with tide symbols
 
   -B    - standard, but leave out the tide symbol.
 
           Options -q and -qB  can be combined with one of
           the following:
 
   -S    - for piping into cxa, prepend -S to the tide symbol;
   -C    - like -S, append ' c ' operator;
           no apostrophes, tightly written values.
   -X    - like -C, write out cxa commands ready to
           execute/paste/write to a source-script.
           Will return Real,Imag pairs. Works only with
           one of -r -e -n at a time.
   -x[o] - add operators ' c o ', e.g. -xs for subtraction
   -A    - Like -C; extend command line with operators ' c s a '
           and leave out tide symbol
           (thought for pasting to cxa-input lines)
 
   -Oopt - (cumulative) add other options to cxa,
           e.g. -O-, to avoid commas

 -Tb[,e] - Print only tides in these columns, e.g. -T1 for M2
           Default = 1,11
 
 EXAMPLES:

   $ blq-displacements.pl -C -q -r BRFT HAMTIDE/BRFT.blq
   -SM2 (35.520,34.0) c
   ...
 
   $ blq-displacements.pl -A -q -r BRFT TPXO.7.2/BRFT.blq
   (35.650,34.1) c s p
   ...
 
   $ blq-displacements.pl -S -q -r -e -n BRFT TPXO.7.2/BRFT.blq
   -SM2 (35.650,34.1) c  (4.720,-160.2) c  (5.520,-128.4) c
   ...
 
   $ blq-displacements.pl -q -r -e -n BRFT TPXO.7.2/BRFT.blq
     M2 '( 35.650,  34.1)'  '(  4.720,-160.2)'  '(  5.520,-128.4)'
 
   $ blq-displacements.pl -X -q -r FALK FES-CMC.blq >! cxa.csh
   $ . cxa.csh
 
   Another example is in ~/Oload/AnnaBLQ/M2-diff-3d making three files
   M2-diff-?.dat (components r e n) containing
   SITE      lon        lat              diff_re      diff_im
   AUCK   174.8344   -36.6028  AUCK_M2 8.37924E-02 1.20394E-014
   ...