Station Pressure script file - Weather Calculators and converters

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#stnpress.cgi by Tim Brice NWS El Paso

#Change pressure to millibars and height to meters

if ($stn{press} =~ /(\d+)\.?(\d+)|^\d+?/) {
  if ($stn{inormb} =~ millibars) {
    $press = $stn{press};
  } else {
    $press = $stn{press} * 33.8639;
  }
} else {
  print "An illegal character was entered.\n";
  die
}

if ($stn{height} =~ /(\d+)\.?(\d+)|^\d+$/) {
   if ($stn{ftorm} =~ meters) {
     $height = $stn{height};
  } else {
     $height = $stn{height} * .3048;
  }
} else {
  print "An illegal character was entered.\n";
  die
}

#Do some math

$n2 = 0.190284;

$p22 = $press**$n2;
$p23 = 8.42288e-05 * $height;
$p24 = 1/$n2;

$p2 = ($p22 - $p23)**$p24 + 0.3;

#Make some pretty output

$p21 = $p2 * 0.0295300;

$~ = AT1;
write;

format AT1 =
With an altimeter setting of @###.## @<<<<<<<<<<<<<<<<< and a station
 $stn{press} $stn{inormb}
elevation of @####.# @<<<<<<:
 $stn{height} $stn{ftorm}

You get an actual station pressure of @#.## inches of Mercury
 $p21
or@###.# Millibars.
 $p2
.

print "Please note, if you are pilot, you should not use the Weather
Calculator for any kind of flight planning. The Weather Calculator
is for general information and entertainment purposes only.";

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