author | A.M. Thurnherr <ant@ldeo.columbia.edu> |
Thu, 21 Nov 2013 09:07:17 -0500 | |
changeset 13 | 2788bf1bf1de |
parent 3 | 9c021fdea1ff |
permissions | -rw-r--r-- |
3
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1 |
#====================================================================== |
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2 |
# S V E L _ C O R R E C T I O N S . P L |
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# doc: Thu Dec 30 01:35:18 2010 |
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4 |
# dlm: Thu Oct 6 12:20:51 2011 |
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5 |
# (c) 2010 A.M. Thurnherr |
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6 |
# uE-Info: 35 0 NIL 0 0 72 2 2 4 NIL ofnI |
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7 |
#====================================================================== |
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8 |
|
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9 |
# HISTORY: |
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10 |
# Dec 30, 2010: - created |
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11 |
# Oct 5, 2011: - sscorr_w temporarily disabled |
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12 |
# - re-enabled |
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13 |
|
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14 |
# NOTES: |
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15 |
# In an effort to track down the scale bias, NBP0901 stn 160 was reprocessed with various |
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16 |
# simplified soundspeed correction methods: |
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17 |
# 1) no sscorr: bias is depth dependent and disappears btw 2500 and 3000m |
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18 |
# 2) simplified (dBin/dADCP): very similar to full correction, esp. when dBin is used |
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19 |
# 3) hacked correction (1450m/s vs 1500m/s assumed soundspeed) => bias largely disappears |
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20 |
|
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sub sscorr_w($$$$) # sound-speed correction for w |
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22 |
{ # see RDI Coord. Trans. manual sec. 4.1, ... |
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23 |
my($wObs,$wCTD,$dADCP,$dBin) = @_; # but there is an error: the ^2 applies to the [] |
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24 |
my($tanSqBeamAngle) = tan(rad($LADCP{BEAM_ANGLE}))**2; |
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25 |
|
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26 |
$dADCP = int($dADCP); # @sVelProf is binned to 1m |
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$dBin = int($dBin); |
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28 |
|
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29 |
while (!numberp($sVelProf[$dADCP])) { $dADCP--; } # skip gaps & bottom of profile |
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30 |
while (!numberp($sVelProf[$dBin ])) { $dBin--; } |
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31 |
|
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32 |
my($Kn) = sqrt(1 + (1 - $sVelProf[$dBin]/$sVelProf[$dADCP])**2 * $tanSqBeamAngle); |
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33 |
### return $wObs - $wCTD; # no correction |
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### return ($wObs*$sVelProf[$dBin]/1500 - $wCTD); # simplified correction; dADCP instead of dBin similar |
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35 |
return ($wObs*$sVelProf[$dBin]/1500 - $wCTD) / $Kn; # full correction |
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36 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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37 |
|
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38 |
sub calc_binDepths($) # see RDI Coord Trans manual sec. 4.2 |
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A.M. Thurnherr <athurnherr@yahoo.com>
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39 |
{ |
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A.M. Thurnherr <athurnherr@yahoo.com>
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40 |
my($ens) = @_; |
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41 |
my(@bindz); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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42 |
|
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A.M. Thurnherr <athurnherr@yahoo.com>
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43 |
my($tanSqBeamAngle) = tan(rad($LADCP{BEAM_ANGLE}))**2; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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44 |
my($curdz) = 0; # calc avg sndspeed btw transducer & 1st bin |
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45 |
$curdz-- until numberp($sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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46 |
my($avgss) = my($ADCPss) = $sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]; |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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47 |
|
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A.M. Thurnherr <athurnherr@yahoo.com>
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48 |
my($sumss) = my($nss) = 0; |
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49 |
if ($LADCP{ENSEMBLE}[$ens]->{XDUCER_FACING_UP}) { |
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50 |
while ($curdz >= -$LADCP{DISTANCE_TO_BIN1_CENTER}*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT}))) { |
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A.M. Thurnherr <athurnherr@yahoo.com>
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51 |
if (numberp($sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)])) { |
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$sumss += $sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]; $nss++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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53 |
} |
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54 |
$curdz--; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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55 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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} else { |
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57 |
while ($curdz <= $LADCP{DISTANCE_TO_BIN1_CENTER}*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT}))) { |
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58 |
if (numberp($sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)])) { |
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59 |
$sumss += $sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]; $nss++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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60 |
} |
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61 |
$curdz++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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62 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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63 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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64 |
$avgss = $sumss/$nss if ($nss>0); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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65 |
|
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A.M. Thurnherr <athurnherr@yahoo.com>
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66 |
my($Kn) = sqrt(1 + (1 - $avgss/$ADCPss)**2 * $tanSqBeamAngle); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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67 |
$bindz[0] = $LADCP{ENSEMBLE}[$ens]->{XDUCER_FACING_UP} ? |
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68 |
- $LADCP{DISTANCE_TO_BIN1_CENTER}*$Kn*$avgss/1500*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT})) : |
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A.M. Thurnherr <athurnherr@yahoo.com>
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69 |
+ $LADCP{DISTANCE_TO_BIN1_CENTER}*$Kn*$avgss/1500*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT})); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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70 |
|
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A.M. Thurnherr <athurnherr@yahoo.com>
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71 |
for (my($bin)=1; $bin<=$LADCP_lastBin-1; $bin++) { |
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A.M. Thurnherr <athurnherr@yahoo.com>
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72 |
$sumss = $nss = 0; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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73 |
if ($LADCP{ENSEMBLE}[$ens]->{XDUCER_FACING_UP}) { |
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A.M. Thurnherr <athurnherr@yahoo.com>
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74 |
while ($curdz >= $bindz[$bin-1]-$LADCP{BIN_LENGTH}*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT}))) { |
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A.M. Thurnherr <athurnherr@yahoo.com>
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75 |
if (numberp($sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)])) { |
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Before replacing command-line options by default variables.
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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76 |
$sumss += $sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]; $nss++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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77 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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78 |
$curdz--; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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79 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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80 |
} else { |
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81 |
while ($curdz <= $bindz[$bin-1]+$LADCP{BIN_LENGTH}*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT}))) { |
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parents:
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82 |
if (numberp($sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)])) { |
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Before replacing command-line options by default variables.
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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83 |
$sumss += $sVelProf[int($LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH}+$curdz)]; $nss++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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|
84 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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|
85 |
$curdz++; |
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A.M. Thurnherr <athurnherr@yahoo.com>
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86 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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|
87 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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88 |
$avgss = $sumss/$nss if ($nss > 0); # otherwise, leave avgss as is |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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89 |
|
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|
90 |
$Kn = sqrt(1 + (1 - $avgss/$ADCPss)**2 * $tanSqBeamAngle); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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|
91 |
$bindz[$bin] = $LADCP{ENSEMBLE}[$ens]->{XDUCER_FACING_UP} ? |
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92 |
$bindz[$bin-1] - $LADCP{BIN_LENGTH}*$Kn*$avgss/1500*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT})) : |
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|
93 |
$bindz[$bin-1] + $LADCP{BIN_LENGTH}*$Kn*$avgss/1500*cos(rad($LADCP{ENSEMBLE}[$ens]->{TILT})); |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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94 |
} |
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A.M. Thurnherr <athurnherr@yahoo.com>
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95 |
|
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A.M. Thurnherr <athurnherr@yahoo.com>
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96 |
my(@bindepth); |
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A.M. Thurnherr <athurnherr@yahoo.com>
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97 |
for (my($i)=0; $i<@bindz; $i++) { |
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A.M. Thurnherr <athurnherr@yahoo.com>
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98 |
$bindepth[$i] = $LADCP{ENSEMBLE}[$ens]->{CTD_DEPTH} + $bindz[$i]; |
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A.M. Thurnherr <athurnherr@yahoo.com>
parents:
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|
99 |
} |
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100 |
return @bindepth; |
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101 |
} |
9c021fdea1ff
Before replacing command-line options by default variables.
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
diff
changeset
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102 |
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9c021fdea1ff
Before replacing command-line options by default variables.
A.M. Thurnherr <athurnherr@yahoo.com>
parents:
diff
changeset
|
103 |
1; |