author | A.M. Thurnherr <athurnherr@yahoo.com> |
Wed, 16 May 2012 18:56:20 +0000 | |
changeset 12 | 65582c172355 |
parent 9 | 48b2d27aaebf |
child 17 | 343ba18738cf |
permissions | -rw-r--r-- |
1 | 1 |
#====================================================================== |
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# L A D C P P R O C . L O A D C T D |
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# doc: Thu Dec 9 18:39:01 2010 |
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9
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
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# dlm: Tue Apr 17 18:10:38 2012 |
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# (c) 2010 A.M. Thurnherr |
9
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
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# uE-Info: 18 27 NIL 0 0 72 2 2 4 NIL ofnI |
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#====================================================================== |
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# HISTORY: |
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# Dec 9, 2010: - exported from LADCPproc |
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# - added support for ASCII files |
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# Dec 16, 2010: - BUG cnv read did not work any more |
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2 | 13 |
# Jan 10, 2011: - added code to skip ANTS header |
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# Jan 22, 2011: - adapted to new -g |
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6 | 15 |
# Jul 15, 2011: - added $CTD{first_elapsed} |
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# Feb 5, 2012: - BUG: ASCII file did not deal with leading spaces correctly |
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9
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
17 |
# Apr 11, 2012: - BUG: ASCII file did not handle nan latlons correctly |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
18 |
# Apr 17, 2012: - fiddled |
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sub readCTD_ASCII($$) |
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{ |
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my($fn,$dtaR) = @_; |
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croak("$fn: unknown pressure field\n") unless defined($CTD_ASCII_press_field); |
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croak("$fn: unknown temperature field\n") unless defined($CTD_ASCII_temp_field); |
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croak("$fn: unknown salinity field\n") unless defined($CTD_ASCII_salin_field); |
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unless (numberp($dtaR->{lat})) { |
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croak("$fn: unknown latitude field\n") unless defined($CTD_ASCII_lat_field); |
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croak("$fn: unknown longitude field\n") unless defined($CTD_ASCII_lon_field); |
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} |
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$CTD_ASCII_badval = 9e99 unless defined($CTD_ASCII_badval); |
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open(F,$fn) || croak("$fn: $!\n"); |
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my($sumLat,$sumLon); my($nPos) = 0; |
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my($ds); |
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while (chomp($ds = <F>)) { |
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next if ($ds =~ /^#/); |
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$ds =~ s/^\s+//; # strip leading spaces |
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my(@rec) = split('\s+',$ds); |
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push(@{$dtaR->{press}},($rec[$CTD_ASCII_press_field-1] == $CTD_ASCII_badval) ? nan : $rec[$CTD_ASCII_press_field-1]); |
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push(@{$dtaR->{temp}}, ($rec[$CTD_ASCII_temp_field-1] == $CTD_ASCII_badval) ? nan : $rec[$CTD_ASCII_temp_field-1]); |
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push(@{$dtaR->{salin}},($rec[$CTD_ASCII_salin_field-1] == $CTD_ASCII_badval) ? nan : $rec[$CTD_ASCII_salin_field-1]); |
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9
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
44 |
if (defined($CTD_ASCII_lat_field) && |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
45 |
numberp($rec[$CTD_ASCII_lat_field-1]) && |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
46 |
$rec[$CTD_ASCII_lat_field-1] != $CTD_ASCII_badval) { |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
47 |
$nPos++; |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
48 |
$sumLat += $rec[$CTD_ASCII_lat_field-1]; |
48b2d27aaebf
after fixing bad magdec bug
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
6
diff
changeset
|
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$sumLon += $rec[$CTD_ASCII_lon_field-1]; |
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} |
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} |
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close(F); |
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if ($nPos > 0) { |
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$dtaR->{lat} = $sumLat / $nPos; |
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$dtaR->{lon} = $sumLon / $nPos; |
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} |
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$dtaR->{sampint} = 1 / $CTD_ASCII_sampfreq; |
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} |
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sub readCTD_CNV($$) |
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{ |
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my($fn,$dtaR) = @_; |
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my($CTD_nrecs,$CTD_nfields,$pressF,$tempF,$salinF,$elapsedF); |
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my($CTD_badval,$CTD_file_type); |
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open(F,$fn) || croak("$fn: $!\n"); |
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while (1) { # parse header |
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my($hdr); |
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chomp($hdr = <F>); |
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$hdr =~ s/\r*$//; |
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croak("$0: unexpected EOF (format error)\n") unless defined($hdr); |
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last if ($hdr eq '*END*'); |
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$CTD_nfields = $',next if ($hdr =~ /nquan = /); # Layout |
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$CTD_nrecs = $',next if ($hdr =~ /nvalues = /); |
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$elapsedF = $1,next if ($hdr =~ /name (\d+) = timeS:/); |
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$pressF = $1,next if ($hdr =~ /name (\d+) = prDM:/); |
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if ($opt_2) { |
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$tempF = $1,next if ($hdr =~ /name (\d+) = t190C:/); |
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$salinF = $1,next if ($hdr =~ /name (\d+) = sal11:/); |
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} else { |
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$tempF = $1,next if ($hdr =~ /name (\d+) = t090C:/); |
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$salinF = $1,next if ($hdr =~ /name (\d+) = sal00:/); |
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} |
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&antsAddParams('start_time',$1),next # selected metadata |
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if ($hdr =~ /start_time = (.*)/); |
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&antsAddParams('station',$1),next |
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if ($hdr =~ /Station\s*:\s*(.*)/); |
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&antsAddParams('ship',$1),next |
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if ($hdr =~ /Ship\s*:\s*(.*)\s*$/); |
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&antsAddParams('cruise',$1),next |
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if ($hdr =~ /Cruise\s*:\s*(.*)\s*$/); |
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&antsAddParams('time',$1),next |
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if ($hdr =~ /Time\s*:\s*(.*)/); |
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&antsAddParams('date',$1),next |
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if ($hdr =~ /Date\s*:\s*(.*)/); |
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if ($hdr =~ /Latitude\s*[=:]\s*/) { |
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($deg,$min,$NS) = split(/ /,$'); |
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$dtaR->{lat} = $deg + $min/60; |
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$dtaR->{lat} *= -1 if ($NS eq 'S'); |
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next; |
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} |
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if ($hdr =~ /Longitude\s*[=:]\s*/) { |
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($deg,$min,$EW) = split(/ /,$'); |
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$dtaR->{lon} = $deg + $min/60; |
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$dtaR->{lon} *= -1 if ($EW eq 'W'); |
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next; |
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} |
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if ($hdr =~ /interval = seconds: /) { |
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$dtaR->{sampint} = 1*$'; |
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next; |
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} |
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$CTD_badval = $',next |
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if ($hdr =~ /bad_flag = /); |
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$CTD_file_type = $',next |
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if ($hdr =~ /file_type = /); |
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} |
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croak("$CTD_file: cannot determine CTD file layout\n") |
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unless ($CTD_nfields && $CTD_nrecs); |
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croak("$CTD_file: cannot determine missing value\n") |
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unless defined($CTD_badval); |
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croak("$CTD_file: not a CTD time series file\n") |
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unless ($dtaR->{sampint}); |
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croak("$CTD_file: no pressure field\n") |
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unless defined($pressF); |
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croak("$CTD_file: no suitable temperature field\n") |
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unless defined($tempF); |
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croak("$CTD_file: no suitable salinity field\n") |
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unless defined($salinF); |
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if ($CTD_file_type eq 'ascii') { |
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while (1) { |
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last unless (my(@rec) = &antsFileIn(F)); |
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$dtaR->{first_elapsed} = $rec[$elapsedF] |
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if defined($elapsedF) && !defined($dtaR->{first_elapsed}); |
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push(@{$dtaR->{press}},($rec[$pressF] == $CTD_badval) ? nan : $rec[$pressF]); |
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push(@{$dtaR->{temp}}, ($rec[$tempF] == $CTD_badval) ? nan : $rec[$tempF]); |
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push(@{$dtaR->{salin}},($rec[$salinF] == $CTD_badval) ? nan : $rec[$salinF]); |
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} |
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} elsif ($CTD_file_type eq 'binary') { |
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my($fbits) = 8 * length(pack('f',0)); |
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croak(sprintf("$0: incompatible native CPU float representation (%d instead of 32bits)\n",fbits)) |
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unless ($fbits == 32); |
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croak("$fn: can't read binary data\n") |
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unless (read(F,my($dta),4*$CTD_nfields*$CTD_nrecs) == 4*$CTD_nfields*$CTD_nrecs); |
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print(STDERR "$fn: WARNING: extraneous data at EOF\n") unless eof(F); |
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$dta = pack('V*',unpack('N*',$dta)) # big-endian CPU |
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if (unpack('h*', pack('s', 1)) =~ /01/); # c.f. perlport(1) |
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my(@dta) = unpack("f*",$dta); |
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for (my($r)=0; $r<$CTD_nrecs; $r++) { |
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push(@{$dtaR->{press}},($dta[$r*$CTD_nfields+$pressF] == $CTD_badval) ? nan : $dta[$r*$CTD_nfields+$pressF]); |
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push(@{$dtaR->{temp}}, ($dta[$r*$CTD_nfields+$tempF] == $CTD_badval) ? nan : $dta[$r*$CTD_nfields+$tempF]); |
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push(@{$dtaR->{salin}},($dta[$r*$CTD_nfields+$salinF] == $CTD_badval) ? nan : $dta[$r*$CTD_nfields+$salinF]); |
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} |
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} else { |
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croak("$fn: unknown CTD file type $CTD_file_type\n"); |
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} |
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close(F); |
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} |
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sub readCTD($$) |
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{ |
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my($fn,$dtaR) = @_; |
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if (defined($CTD_ASCII_sampfreq)) { |
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readCTD_ASCII($fn,$dtaR); |
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} else { |
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readCTD_CNV($fn,$dtaR); |
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} |
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croak("$0: unknown latitude\n") unless defined($dtaR->{lat}); |
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&antsAddParams('lat',$dtaR->{lat}); |
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croak("$0: unknown longitude\n") unless defined($dtaR->{lon}); |
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&antsAddParams('lon',$dtaR->{lon}); |
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&antsAddParams('CTD_sampfreq',1/$dtaR->{sampint}); |
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&antsAddParams('ITS',$P{ITS} = 90); |
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} |
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1; |