#======================================================================

#                    P L O T _ T I M E _ L A G S . P L 

#                    doc: Tue Jul 28 13:21:09 2015

#                    (c) 2015 A.M. Thurnherr

#======================================================================

# HISTORY:

#	Jul 29, 2015: - created from [LWplot_TL]

#   Jan 26, 2016: - added return on no data to plot

#	Mar 16, 2016: - adapted to gmt5

#   May 18, 2016: - added version

#	May 24, 2016: - fixed for partial-depth casts

require "$ANTS/libGMT.pl";

sub plot_time_lags($)

{

	my($pfn) = @_;

	return unless ($P{'elapsed.min'});

	my($xmin) = $P{'elapsed.min'}/60;

	my($xmax) = $P{'elapsed.max'}/60;

	my($ymin) = -24;

	my($ymax) =  24;

	my($R) = "-R$xmin/$xmax/$ymin/$ymax";

	GMT_begin($pfn,'-JX10',$R,'-P');

	GMT_psxy('-W1,grey30');											# time lines

	for (my($x)=round($xmin,10); $x<=$xmax; $x+=10) {

		printf(GMT "%f $ymin\n%f $ymax\n>\n",$x,$x);

	}

	}

	GMT_psxy('-Sc0.1 -Gcoral');										# individual offsets

		for (my($wi)=0; $wi<@elapsed_buf; $wi++) {

			last unless ($elapsed_buf[$wi]<$LADCP{ENSEMBLE}[$LADCP_atbottom]->{ELAPSED});

			printf(GMT "%f %f\n",$elapsed_buf[$wi]/60,$so_buf[$wi]);

        }

	GMT_psxy('-Sc0.1 -GSeaGreen');

		for (my($wi)=0; $wi<@elapsed_buf; $wi++) {

			next if ($elapsed_buf[$wi]<$LADCP{ENSEMBLE}[$LADCP_atbottom]->{ELAPSED});

			printf(GMT "%f %f\n",$elapsed_buf[$wi]/60,$so_buf[$wi]);

        }

	GMT_unitcoords();												# labels

	GMT_pstext('-F+f9,Helvetica,orange+jTR -N -Gwhite');

        print(GMT "0.99 0.99 V$VERSION\n");

	GMT_pstext('-F+f14,Helvetica,blue+jTL -N');

		print(GMT "0.01 1.06 $P{out_basename} $P{run_label}\n");

	GMT_setR($R);

	my($elapsed_tics) = ($xmax-$xmin < 45) ? 'f1a5' : 'f1a30';

	GMT_end("-B$elapsed_tics:'Elapsed Time [min]':/f1a5:'Best Offset [CTD records]':WeSn");	# FINISH PLOT

}

1; # return true on require