Update of /cvsroot/phpweather/phpweather
In directory usw-pr-cvs1:/tmp/cvs-serv29231

Modified Files:
        metar_parser.php 
Log Message:
Rearranging comments and rounding numbers max. up to 5-6 digits. 

Index: metar_parser.php
===================================================================
RCS file: /cvsroot/phpweather/phpweather/metar_parser.php,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -3 -r1.8 -r1.9
--- metar_parser.php    2001/07/05 16:05:11     1.8
+++ metar_parser.php    2001/07/09 20:31:43     1.9
@@ -22,20 +22,24 @@
   /**
    * The decoded METAR is stored here.
    *
-   * $decoded_metar is an array of arrays. Each sub-array corresponds to a group of 
related weather-info. We have cloud-groups, visibility-groups and so on.
+   * $decoded_metar is an array of arrays. Each sub-array corresponds
+   * to a group of related weather-info. We have cloud-groups,
+   * visibility-groups and so on.
    *
    * @var  array
    */
   var $decoded_metar;
 
   /**
-   * This constructor does nothing besides passing the input down the hierarchy.
+   * This constructor does nothing besides passing the input down the
+   * hierarchy.
    *
    * @param    array   The initial properties of the object.
    */
   function metar_parser($input) {
-    /* This class doesn't have any defaults, so it just calls the
-       parent constructor. */
+  /* This class doesn't have any defaults, so it just calls the
+   * parent constructor. 
+   */
     $this->data_retrieval($input);
   }
 
@@ -44,26 +48,28 @@
    *
    * Given a numerical temperature $temp in Celsius, coded to tenth of
    * degree, store in $temp_c, convert to Fahrenheit and store in
-   * $temp_f
+   * $temp_f.
    *
-   * @param   string   The temperature to convert, coded to tenth of degree, like 1015
-   * @param   integer  The temperature measured in degrees Celsius
-   * @param   integer  The temperature measured in degrees Fahrenheit
+   * @param string   Temperature to convert, coded to tenth of
+   *                degree, like 1015
+   * @param   integer   Temperature measured in degrees Celsius
+   * @param   integer   Temperature measured in degrees Fahrenheit
    * @access  private
    */
   function store_temp($temp, &$temp_c, &$temp_f) {
-    /*
-     * Note: $temp is converted to negative if $temp > 100.0 (See
-     * Federal Meteorological Handbook for groups T, 1, 2 and 4) For
-     * example, a temperature of 2.6C and dew point of -1.5C would be
-     * reported in the body of the report as "03/M01" and the
-     * TsnT'T'T'snT'dT'dT'd group as "T00261015").  */
+  /*
+   * Note: $temp is converted to negative if $temp > 100.0 (See
+   * Federal Meteorological Handbook for groups T, 1, 2 and 4). 
+   * For example, a temperature of 2.6C and dew point of -1.5C 
+   * would be reported in the body of the report as "03/M01" and the
+   * TsnT'T'T'snT'dT'dT'd group as "T00261015").  
+   */
     
     if ($temp[0] == 1) {
       $temp[0] = '-';
     }
     $temp_c = number_format($temp,1);
-    /* The temperature in Fahrenheit. */
+  /* The temperature in Fahrenheit. */
     $temp_f = number_format($temp * (9/5) + 32, 1);
   }
   
@@ -73,11 +79,16 @@
    *
    * $value is converted and stored based on $windunit.
    *
-   * @param   float   The value one seeks to convert.
-   * @param   string  The unit of $value.
-   * @param   float   &$knots         After $value has been converted into knots, it 
will be stored in this variable.
-   * @param   float   &$meterspersec  After $value has been converted into meters per 
second, it will be stored in this variable.
-   * @param   float   &$milesperhour  After $value has been converted into miles per 
hour, it will be stored in this variable.
+   * @param  float   The value one seeks to convert.
+   * @param  string  The unit of $value.
+   * @param  float &$knots   After $value has been converted into knots,
+   *                        it will be stored in this variable.
+   * @param  float &$meterspersec   After $value has been converted into
+   *                               meters per second, it will be stored 
+   *                               in this variable.
+   * @param  float &$milesperhour   After $value has been converted into
+   *                               miles per hour, it will be stored 
+   *                               in this variable.
    * @access  private
    */
   function store_speed($value, $windunit, &$knots, &$meterspersec, &$milesperhour) {
@@ -89,25 +100,25 @@
     }
     
     if ($windunit == 'KT') {
-      /* The windspeed measured in knots: */
+  /* The windspeed measured in knots: */
       $knots        = number_format($value);
-      /* The windspeed measured in meters per second, rounded to one decimal place: */
-      $meterspersec = number_format($value * 0.51444, 1);
-      /* The windspeed measured in miles per hour, rounded to one decimal place: */
-    $milesperhour = number_format($value * 1.1507695060844667, 1);
+  /* The windspeed measured in meters per second, rounded to one decimal place    */
+      $meterspersec = number_format($value * 0.5144, 1);
+  /* The windspeed measured in miles per hour, rounded to one decimal place */
+    $milesperhour = number_format($value * 1.1508, 1);
     } elseif ($windunit == 'MPS') {
-      /* The windspeed measured in meters per second: */
+  /* The windspeed measured in meters per second */
       $meterspersec = number_format($value);
-      /* The windspeed measured in knots, rounded to one decimal place: */
-      $knots        = number_format($value / 0.51444, 1);
-      /* The windspeed measured in miles per hour, rounded to one decimal place: */
-      $milesperhour = number_format($value / 0.51444 * 1.1507695060844667, 1);
+  /* The windspeed measured in knots, rounded to one decimal place */
+      $knots        = number_format($value / 0.5144, 1);
+  /* The windspeed measured in miles per hour, rounded to one decimal place */
+      $milesperhour = number_format($value / 0.5144 * 1.1508, 1);
     } elseif ($windunit == 'KMH') {
-      /* The windspeed measured in kilometers per hour: */
+  /* The windspeed measured in kilometers per hour */
       $meterspersec = number_format($value * 1000 / 3600, 1);
-      $knots        = number_format($value * 1000 / 3600 / 0.51444, 1);
-      /* The windspeed measured in miles per hour, rounded to one decimal place: */
-      $milesperhour = number_format($knots * 1.1507695060844667, 1);
+      $knots        = number_format($value * 1000 / 3600 / 0.5144, 1);
+  /* The windspeed measured in miles per hour, rounded to one decimal place */
+      $milesperhour = number_format($knots * 1.1508, 1);
     }
   }
   
@@ -115,14 +126,17 @@
   /**
    * Decodes a raw METAR.
    *
-   * This function loops over the various parts of the raw METAR, and stores the 
different bits in $decoded_metar. It uses get_metar() to retrieve the METAR, so it is 
not necessary to connect to the database before you call this function.
+   * This function loops over the various parts of the raw METAR, and
+   * stores the different bits in $decoded_metar. It uses get_metar() to
+   * retrieve the METAR, so it is not necessary to connect to the database
+   * before you call this function.
    *
-   * @return  array  The decoded METAR.
+   * @return  array   The decoded METAR.
    * @see     $decoded_metar
    * @access  public
    */
   function decode_metar() {
-    /* initialization */
+  /* initialization */
     $cloud_groups      = 0;
     $weather_groups    = 0;
     $visibility_groups = 0;
@@ -140,50 +154,57 @@
       $part = $parts[$i];
       
       if (ereg('RMK|TEMPO|BECMG|INTER', $part)) {
-       /* The rest of the METAR is either a remark or temporary
-          information. We skip the rest of the METAR. */
+  /* The rest of the METAR is either a remark or temporary
+   * information. We skip the rest of the METAR. 
+   */
        $decoded_metar['remarks'] .= ' ' . $part;
        break;
       } elseif ($part == 'METAR') {
-       /*
-        * Type of Report: METAR
-        */
+  /*
+   * Type of Report: METAR
+   */
        $decoded_metar['type'] = 'METAR';
       } elseif ($part == 'SPECI') {
-       /*
-        * Type of Report: SPECI
-        */
+  /*
+   * Type of Report: SPECI
+   */
        $decoded_metar['type'] = 'SPECI';
       } elseif (ereg('^[A-Z]{4}$', $part) && ! isset($decoded_metar['station']))  {
-       /*
-        * Station Identifier
-        */
+  /*
+   * Station Identifier
+   */
        $decoded_metar['station']  = $part;
       } elseif (ereg('([0-9]{2})([0-9]{2})([0-9]{2})Z', $part, $regs)) {
-       /*
-        * Date and Time of Report
-        * We return a standard Unix UTC/GMT timestamp suitable for
-        * gmdate()
-        * There has been a report about the time beeing wrong. If you
-        * experience this, then change the next line. You should
-        * add/subtract some hours to $regs[2], e.g. if all your times
-        * are 960 minutes off (16 hours) then add 16 to $regs[2].
-        */
+  /*
+   * Date and Time of Report.
+   *
+   * We return a standard Unix UTC/GMT timestamp suitable for
+   * gmdate().
+   * There has been a report about the time being wrong. If you
+   * experience this, then change the next line. You should
+   * add/subtract some hours to $regs[2], e.g. if all your times
+   * are 960 minutes off (16 hours) then add 16 to $regs[2].
+   */
        if ($regs[1] > gmdate('j')) {
-       /* The day is greather that the current day of month => the
-           report is from last month. */
+  /* The day is greather that the current day of month => the
+   * report is from last month. 
+   */
          $month = gmdate('n') - 1;
        } else {
          $month = gmdate('n');
        }
        $decoded_metar['time'] = gmmktime($regs[2], $regs[3], 0, $month, $regs[1], 
gmdate('Y'));
       } elseif (ereg('(AUTO|COR|RTD|CC[A-Z]|RR[A-Z])', $part, $regs)) {
-       /*
-        * Report Modifier: AUTO, COR, CCx or RRx
-        */
+
+  /*
+   * Report Modifier: AUTO, COR, CCx or RRx
+   */
+
        $decoded_metar['report_mod'] = $regs[1];
       } elseif (ereg('([0-9]{3}|VRB)([0-9]{2,3})G?([0-9]{2,3})?(KT|MPS|KMH)', $part, 
$regs)) {
-       /* Wind Group */
+
+  /* Wind Group */
+       
        $decoded_metar['wind']['deg'] = $regs[1];
        
        $this->store_speed($regs[2],
@@ -194,8 +215,10 @@
                           );
        
        if (!empty($regs[3])) {
-         /* We have a report with information about the gust.
-            First we have the gust measured in knots: */
+       
+  /* We have a report with information about the gust.
+   * First we have the gust measured in knots.
+   */
          $this->store_speed($regs[3],
                             $regs[4],
                             $decoded_metar['wind']['gust_knots'],
@@ -203,49 +226,66 @@
                             $decoded_metar['wind']['gust_miles_per_hour']);
        }
       } elseif (ereg('^([0-9]{3})V([0-9]{3})$', $part, $regs)) {
-       /*
-        * Variable wind-direction
-        */
+
+  /*
+   * Variable wind-direction
+   */
+       
        $decoded_metar['wind']['var_beg'] = $regs[1];
        $decoded_metar['wind']['var_end'] = $regs[2];
       } elseif(ereg('^([0-9]{4})([NS]?[EW]?)$', $part, $regs)) {
-       /* 
-        * Visibility in meters (4 digits only)
-        */
+
+  /* 
+   * Visibility in meters (4 digits only)
+   */
+
        $visibility_groups++;
        if ($regs[1] == '0000') {
-         /* Special low value */
+       
+  /* Special low value */
+       
          $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = -1; /* 
Less than */
-         $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 50;
-         $decoded_metar['visibility_group' . $visibility_groups]['km']     = 0.05;
-         $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 164;
-         $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 0.031;
+
+   $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 50;
+   $decoded_metar['visibility_group' . $visibility_groups]['km']     = 0.05;
+   $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 164;
+   $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 0.031;
        } elseif ($regs[1] == '9999') {
-         /* Special high value */
-         $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = 1; /* 
Greater than */
-         $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 10000;
-         $decoded_metar['visibility_group' . $visibility_groups]['km']     = 10;
-         $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 32800;
-         $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 6.2;
+
+  /* Special high value */
+       
+   $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = 1; 
+  /* Greater than */
+
+   $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 10000;
+   $decoded_metar['visibility_group' . $visibility_groups]['km']     = 10;
+   $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 32800;
+   $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 6.2;
        } else {
-         /* Normal visibility, returned in both small and large units. */
-         $decoded_metar['visibility_group' . $visibility_groups]['km']     = 
number_format($regs[1]/1000, 1);
-         $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 
number_format($regs[1]/1609.344, 1);
-         $decoded_metar['visibility_group' . $visibility_groups]['meter']  = $regs[1] 
* 1;
-         $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 
round($regs[1] * 3.28084);
+
+  /* Normal visibility, returned in both small and large units. */
+
+   $decoded_metar['visibility_group' . $visibility_groups]['km']     = 
+number_format($regs[1]/1000, 1);
+   $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 
+number_format($regs[1]/1609.344, 1);
+   $decoded_metar['visibility_group' . $visibility_groups]['meter']  = $regs[1] * 1;
+   $decoded_metar['visibility_group' . $visibility_groups]['ft']     = round($regs[1] 
+* 3.28084);
        }
        if (!empty($regs[2])) {
          $decoded_metar['visibility_group' . $visibility_groups]['dir']     = 
$regs[2];
        }
       } elseif (ereg('^[0-9]$', $part)) {
-       /*
-        * Temp Visibility Group, single digit followed by space
-        */
+
+  /*
+   * Temp Visibility Group, single digit followed by space.
+   */
+
        $temp_visibility_miles = $part;
       } elseif (ereg('^M?(([0-9]?)[ ]?([0-9])(/?)([0-9]*))SM$', 
$temp_visibility_miles . ' ' . $part, $regs)) {
-       /*
-        * Visibility Group
-        */
+
+  /*
+   * Visibility Group
+   */
+
        $visibility_groups++;
        if ($regs[4] == '/') {
          $vis_miles = $regs[2] + $regs[3]/$regs[5];
@@ -253,30 +293,48 @@
        $vis_miles = $regs[1];
       }
       if ($regs[0][0] == 'M') {
-       /* Prefix - less than */
-       $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = -1; /* 
Less than */
-      }
-      /* The visibility measured in miles: */
-      $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 
number_format($vis_miles, 1);
-      /* The visibility measured in feet: */
-      $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 
round($vis_miles * 5280, 1);
-      /* The visibility measured in kilometers: */
-      $decoded_metar['visibility_group' . $visibility_groups]['km']     = 
number_format($vis_miles * 1.609344, 1);
-      /* The visibility measured in meters: */
-      $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 
round($vis_miles * 1609.344);
+
+  /* Prefix - less than */
+
+       $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = -1;  /* 
+Less than */
+  
+    }
+
+  /* The visibility measured in miles */
+  
+   $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 
+number_format($vis_miles, 1);
+   
+  /* The visibility measured in feet */
+
+   $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 
+round($vis_miles * 5280, 1);
+   
+  /* The visibility measured in kilometers */
+  
+   $decoded_metar['visibility_group' . $visibility_groups]['km']     = 
+number_format($vis_miles * 1.6093, 1);
+
+  /* The visibility measured in meters */
+  
+    $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 
+round($vis_miles * 1609.3);
       } elseif ($part == 'CAVOK') {
-       /* CAVOK: Used when the visibility is greater than 10
-          kilometers, the lowest cloud-base is at 5000 feet or more
-          and there is no significant weather. */
-       $visibility_groups++;
-       $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = 1; /* 
Greater than */
-       $decoded_metar['visibility_group' . $visibility_groups]['km']     = 10;
-       $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 10000;
-       $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 6.2;
-       $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 32800;
-       $decoded_metar['cloud_group1']['condition'] = 'CAVOK';
+
+  /* CAVOK: Used when the visibility is greater than 10
+   * kilometers, the lowest cloud-base is at 5000 feet or more
+   * and there is no significant weather. 
+   */
+
+   $visibility_groups++;
+   $decoded_metar['visibility_group' . $visibility_groups]['prefix'] = 1; 
+  /* Greater than */
+
+   $decoded_metar['visibility_group' . $visibility_groups]['km']     = 10;
+   $decoded_metar['visibility_group' . $visibility_groups]['meter']  = 10000;
+   $decoded_metar['visibility_group' . $visibility_groups]['miles']  = 6.2;
+   $decoded_metar['visibility_group' . $visibility_groups]['ft']     = 32800;
+   $decoded_metar['cloud_group1']['condition'] = 'CAVOK';
       } elseif 
(ereg('^R([0-9]{2})([RLC]?)/([MP]?)([0-9]{4})([DNU]?)V?(P?)([0-9]{4})?([DNU]?)$', 
$part, $regs)) {
-       /* Runway-group */
+
+  /* Runway-group */
+
        $runway_groups++;
        $decoded_metar['runway_group' . $runway_groups]['nr'] = $regs[1];
        if (!empty($regs[2])) {
@@ -284,45 +342,61 @@
        }
        
        if (!empty($regs[7])) {
-         /* We have both min and max visibility since $regs[7] holds
-            the max visibility. */
-         if (!empty($regs[5])) { /* $regs[5] is tendency for min visibility. */
-           $decoded_metar['runway_group' . $runway_groups]['min_tendency'] = $regs[5];
+       
+  /* We have both min and max visibility since $regs[7] holds
+   * the max visibility. 
+   */
+
+  if (!empty($regs[5])) { 
+  /* $regs[5] is tendency for min visibility. */
+   $decoded_metar['runway_group' . $runway_groups]['min_tendency'] = $regs[5];
          }
          
-         if (!empty($regs[8])) { /* $regs[8] is tendency for max visibility. */
-           $decoded_metar['runway_group' . $runway_groups]['max_tendency'] = $regs[8];
+  if (!empty($regs[8])) { 
+  /* $regs[8] is tendency for max visibility. */
+   $decoded_metar['runway_group' . $runway_groups]['max_tendency'] = $regs[8];
          }
          
          if ($regs[3] == 'M') {
-           /* Less than. */
-           $decoded_metar['runway_group' . $runway_groups]['min_prefix'] = -1;
+
+  /* Less than. */
+
+   $decoded_metar['runway_group' . $runway_groups]['min_prefix'] = -1;
          }
-         $decoded_metar['runway_group' . $runway_groups]['min_meter'] = $regs[4] * 1;
-         $decoded_metar['runway_group' . $runway_groups]['min_ft']    = 
round($regs[4] * 3.28084);
+   $decoded_metar['runway_group' . $runway_groups]['min_meter'] = $regs[4] * 1;
+   $decoded_metar['runway_group' . $runway_groups]['min_ft']    = round($regs[4] * 
+3.2808);
          
          if ($regs[6] == 'P') {
-           /* Greater than. */
-           $decoded_metar['runway_group' . $runway_groups]['max_prefix'] = 1;
+
+  /* Greater than. */
+       
+   $decoded_metar['runway_group' . $runway_groups]['max_prefix'] = 1;
          }
-         $decoded_metar['runway_group' . $runway_groups]['max_meter'] = $regs[7] * 1;
-         $decoded_metar['runway_group' . $runway_groups]['max_ft']    = 
round($regs[7] * 3.28084);
+   $decoded_metar['runway_group' . $runway_groups]['max_meter'] = $regs[7] * 1;
+   $decoded_metar['runway_group' . $runway_groups]['max_ft']    = round($regs[7] * 
+3.2808);
          
        } else {
-         /* We only have a single visibility. */
-         if (!empty($regs[5])) { /* $regs[5] holds the tendency for visibility. */
-           $decoded_metar['runway_group' . $runway_groups]['tendency'] = $regs[5];
+
+  /* We only have a single visibility. */
+
+  if (!empty($regs[5])) { 
+  /* $regs[5] holds the tendency for visibility. */
+     $decoded_metar['runway_group' . $runway_groups]['tendency'] = $regs[5];
          }
          
          if ($regs[3] == 'M') {
-           /* Less than. */
-           $decoded_metar['runway_group' . $runway_groups]['prefix'] = -1;
+
+  /* Less than. */
+
+   $decoded_metar['runway_group' . $runway_groups]['prefix'] = -1;
          } elseif ($regs[3] == 'P') {
-           /* Greater than. */
-           $decoded_metar['runway_group' . $runway_groups]['prefix'] = 1;
+
+  /* Greater than. */
+
+   $decoded_metar['runway_group' . $runway_groups]['prefix'] = 1;
          }
-         $decoded_metar['runway_group' . $runway_groups]['meter'] = $regs[4] * 1;
-         $decoded_metar['runway_group' . $runway_groups]['ft']    = round($regs[4] * 
3.28084);
+   $decoded_metar['runway_group' . $runway_groups]['meter'] = $regs[4] * 1;
+   $decoded_metar['runway_group' . $runway_groups]['ft']    = round($regs[4] * 
+3.2808);
        }
       } elseif (ereg('^(VC)?' .                           /* Proximity */
                     '(-|\+)?' .                          /* Intensity */
@@ -331,87 +405,114 @@
                     '(BR|FG|FU|VA|DU|SA|HZ|PY)?' .       /* Obscuration */
                     '(PO|SQ|FC|SS)?$',                   /* Other */
                     $part, $regs)) {
-       /*
-        * Current weather-group
-        */
-       $weather_groups++;
-       $decoded_metar['weather_group'.$weather_groups]['proximity']     = $regs[1];
-       $decoded_metar['weather_group'.$weather_groups]['intensity']     = $regs[2];
-       $decoded_metar['weather_group'.$weather_groups]['descriptor']    = $regs[3];
-       $decoded_metar['weather_group'.$weather_groups]['precipitation'] = $regs[4];
-       $decoded_metar['weather_group'.$weather_groups]['obscuration']   = $regs[6];
-       $decoded_metar['weather_group'.$weather_groups]['other']         = $regs[7];
 
+  /*
+   * Current weather-group.
+   */
+
+   $weather_groups++;
+   $decoded_metar['weather_group'.$weather_groups]['proximity']     = $regs[1];
+   $decoded_metar['weather_group'.$weather_groups]['intensity']     = $regs[2];
+   $decoded_metar['weather_group'.$weather_groups]['descriptor']    = $regs[3];
+   $decoded_metar['weather_group'.$weather_groups]['precipitation'] = $regs[4];
+   $decoded_metar['weather_group'.$weather_groups]['obscuration']   = $regs[6];
+   $decoded_metar['weather_group'.$weather_groups]['other']         = $regs[7];
+
       } elseif ($part == 'SKC' || $part == 'CLR') {
-       /*
-        * Cloudr-group.
-        * There can be up to three of these groups, so we store them as
-        * cloud_layer1, cloud_layer2 and cloud_layer3.
-        */
+       
+  /*
+   * Cloudr-group.
+   * There can be up to 3 of these groups, so we store them as
+   * cloud_layer1, cloud_layer2 and cloud_layer3.
+   */
+
        $cloud_groups++;
-       /* Again we have to translate the code-characters to a
-          meaningful string. */
-       $decoded_metar['cloud_group'. $cloud_groups]['condition']  = $part;
+
+  /* Again we have to translate the code-characters to a
+   * meaningful string. 
+   */
+
+   $decoded_metar['cloud_group'. $cloud_groups]['condition']  = $part;
       } elseif (ereg('^(VV|FEW|SCT|BKN|OVC)([0-9]{3}|///)(CB|TCU)?$', $part, $regs)) {
-       /* We have found (another) a cloud-layer-group. There can be up
-          to three of these groups, so we store them as cloud_group1,
-          cloud_group2 and cloud_group3. */
+
+  /* We have found (another) a cloud-layer-group. There can be up
+   * to 3 of these groups, so we store them as cloud_group1,
+   * cloud_group2 and cloud_group3. 
+   */
+
        $cloud_groups++;
        $decoded_metar['cloud_group'.$cloud_groups]['condition'] = $regs[1];
        if (!empty($regs[3])) {
          $decoded_metar['cloud_group'.$cloud_groups]['cumulus'] = $regs[3];
        }
        if ($regs[2] == '000') {
-         /* '000' is a special height. */
-         $decoded_metar['cloud_group'.$cloud_groups]['ft']     = 100;
-         $decoded_metar['cloud_group'.$cloud_groups]['meter']  = 30;
-         $decoded_metar['cloud_group'.$cloud_groups]['prefix'] = -1; /* Less than */
+
+  /* '000' is a special height. */
+
+   $decoded_metar['cloud_group'.$cloud_groups]['ft']     = 100;
+   $decoded_metar['cloud_group'.$cloud_groups]['meter']  = 30;
+   $decoded_metar['cloud_group'.$cloud_groups]['prefix'] = -1; /* Less than */
        } elseif ($regs[2] == '///') {
-         /* '///' means height nil */
-         $decoded_metar['cloud_group'.$cloud_groups]['ft']     = 'nil';
-         $decoded_metar['cloud_group'.$cloud_groups]['meter']  = 'nil';
+
+  /* '///' means height nil */
+
+   $decoded_metar['cloud_group'.$cloud_groups]['ft']     = 'nil';
+   $decoded_metar['cloud_group'.$cloud_groups]['meter']  = 'nil';
        } else {
-         $decoded_metar['cloud_group'.$cloud_groups]['ft']     = $regs[2] *100;
-         $decoded_metar['cloud_group'.$cloud_groups]['meter']  = round($regs[2] * 
30.48);
+   $decoded_metar['cloud_group'.$cloud_groups]['ft']     = $regs[2] *100;
+   $decoded_metar['cloud_group'.$cloud_groups]['meter']  = round($regs[2] * 30.48);
        }
       } elseif (ereg('^(M?[0-9]{2})/(M?[0-9]{2})?$', $part, $regs)) {
-       /*
-        * Temperature/Dew Point Group
-        * The temperature and dew-point measured in Celsius and Fahrenheit.
-        */
-       $decoded_metar['temperature']['temp_c'] = round(strtr($regs[1], 'M', '-'));
-       $decoded_metar['temperature']['temp_f'] = round(strtr($regs[1], 'M', '-') * 
(9/5) + 32);
+
+  /*
+   * Temperature/Dew Point Group.
+   *
+   * The temperature and dew-point measured in Celsius and Fahrenheit.
+   */
+
+   $decoded_metar['temperature']['temp_c'] = round(strtr($regs[1], 'M', '-'));
+   $decoded_metar['temperature']['temp_f'] = round(strtr($regs[1], 'M', '-') * (9/5) 
++ 32);
        if (!empty($regs[2])) {
-         $decoded_metar['temperature']['dew_c']  = round(strtr($regs[2], 'M', '-'));
-         $decoded_metar['temperature']['dew_f']  = round(strtr($regs[2], 'M', '-') * 
(9/5) + 32);
+   $decoded_metar['temperature']['dew_c']  = round(strtr($regs[2], 'M', '-'));
+   $decoded_metar['temperature']['dew_f']  = round(strtr($regs[2], 'M', '-') * (9/5) 
++ 32);
        }
       } elseif(ereg('A([0-9]{4})', $part, $regs)) {
-       /*
-        * Altimeter
-        * The pressure measured in inHg
-        */
-       $decoded_metar['altimeter']['inhg'] = number_format($regs[1]/100, 2);
-       /* The pressure measured in mmHg, hPa and atm */
-       $decoded_metar['altimeter']['mmhg'] = number_format($regs[1] * 0.254, 1, '.', 
'');
-       $decoded_metar['altimeter']['hpa']  = round($regs[1] * 0.33863881578947);
-       $decoded_metar['altimeter']['atm']  = number_format($regs[1] * 
3.3421052631579e-4, 3, '.', '');
+
+  /*
+   * Altimeter.
+   * The pressure measured in inHg.
+   */
+
+   $decoded_metar['altimeter']['inhg'] = number_format($regs[1]/100, 2);
+
+  /* The pressure measured in mmHg, hPa and atm */
+
+   $decoded_metar['altimeter']['mmhg'] = number_format($regs[1] * 0.254, 1, '.', '');
+   $decoded_metar['altimeter']['hpa']  = round($regs[1] * 0.33864);
+       $decoded_metar['altimeter']['atm']  = number_format($regs[1] * 3.3421e-4, 3, 
+'.', '');
       } elseif(ereg('Q([0-9]{4})', $part, $regs)) {
-       /*
-        * Altimeter
-        * This is strange, the specification doesnt say anything about
-        * the Qxxxx-form, but it's in the METARs.
-        */
-       /* The pressure measured in hPa */
-       $decoded_metar['altimeter']['hpa']  = round($regs[1]);
-       /* The pressure measured in mmHg, inHg and atm */
-       $decoded_metar['altimeter']['mmhg'] = number_format($regs[1] * 0.7500616827, 
1, '.', '');
-       $decoded_metar['altimeter']['inhg'] = number_format($regs[1] * 0.0295299875, 
2);
-       $decoded_metar['altimeter']['atm']  = number_format($regs[1] * 9.869232667e-4, 
3, '.', '');
+
+  /*
+   * Altimeter.
+   * The specification doesn't say anything about
+   * the Qxxxx-form, but it's in the METARs.
+   */
+
+  /* The pressure measured in hPa */
+       
+   $decoded_metar['altimeter']['hpa']  = round($regs[1]);
+
+  /* The pressure measured in mmHg, inHg and atm */
+
+   $decoded_metar['altimeter']['mmhg'] = number_format($regs[1] * 0.75006, 1, '.', 
+'');
+   $decoded_metar['altimeter']['inhg'] = number_format($regs[1] * 0.02953, 2);
+   $decoded_metar['altimeter']['atm']  = number_format($regs[1] * 9.8692e-4, 3, '.', 
+'');
       } elseif (ereg('^T([0-9]{4})([0-9]{4})', $part, $regs)) {
-       /*
-        * Temperature/Dew Point Group, coded to tenth of degree.
-        * The temperature and dew-point measured in Celsius.
-        */
+
+  /*
+   * Temperature/Dew Point Group, coded to tenth of degree Celsius.
+   */
+
        $this->store_temp($regs[1] / 10,
                          $decoded_metar['temperature']['temp_c'],
                          $decoded_metar['temperature']['temp_f']);
@@ -423,24 +524,28 @@
                          $decoded_metar['temperature']['temp_c'],
                          $decoded_metar['temperature']['temp_f']);
       } elseif (ereg('^1([0-9]{4}$)', $part, $regs)) {
-       /*
-        * 6 hour maximum temperature Celsius, coded to tenth of degree
-        */
+
+  /*
+   * 6 hour maximum temperature Celsius, coded to tenth of degree
+   */
+
        $this->store_temp($regs[1] / 10,
                          $decoded_metar['temp_min_max']['max6h_c'],
                          $decoded_metar['temp_min_max']['max6h_f']);
       } elseif (ereg('^2([0-9]{4}$)', $part, $regs)) {
-       /*
-        * 6 hour minimum temperature Celsius, coded to tenth of degree
-        */
+
+  /*
+   * 6 hour minimum temperature Celsius, coded to tenth of degree
+   */
        $this->store_temp($regs[1] / 10,
                          $decoded_metar['temp_min_max']['min6h_c'],
                          $decoded_metar['temp_min_max']['min6h_f']);
       } elseif (ereg('^4([0-9]{4})([0-9]{4})$', $part, $regs)) {
-       /*
-        * 24 hour maximum and minimum temperature Celsius, coded to
-        * tenth of degree
-        */
+
+  /*
+   * 24 hour maximum and minimum temperature Celsius, coded to
+   * tenth of degree
+   */
        $this->store_temp($regs[1] / 10,
                          $decoded_metar['temp_min_max']['max24h_c'],
                          $decoded_metar['temp_min_max']['max24h_f']);
@@ -448,43 +553,48 @@
                          $decoded_metar['temp_min_max']['min24h_c'],
                          $decoded_metar['temp_min_max']['min24h_f']);
       } elseif(ereg('^P([0-9]{4})', $part, $regs)) {
-       /*
-        * Precipitation during last hour in hundredths of an inch
-        */
+
+  /*
+   * Precipitation during last hour in hundredths of an inch
+   */
        if ($regs[1] == '0000') {
          $decoded_metar['precipitation']['in'] = -1;
          $decoded_metar['precipitation']['mm'] = -1;
        } else {
-         $decoded_metar['precipitation']['in'] = number_format($regs[1]/100, 2);
-         $decoded_metar['precipitation']['mm'] = number_format($regs[1]*0.254, 2);
+   $decoded_metar['precipitation']['in'] = number_format($regs[1]/100, 2);
+   $decoded_metar['precipitation']['mm'] = number_format($regs[1]*0.254, 2);
        }
       } elseif(ereg('^6([0-9]{4})', $part, $regs)) {
-       /*
-        * Precipitation during last 3 or 6 hours in hundredths of an
-        * inch.
-        */
+
+  /*
+   * Precipitation during last 3 or 6 hours in hundredths of an
+   * inch.
+   */
        if ($regs[1] == '0000') {
          $decoded_metar['precipitation']['in_6h'] = -1;
          $decoded_metar['precipitation']['mm_6h'] = -1;
        } else {
-         $decoded_metar['precipitation']['in_6h'] = number_format($regs[1]/100, 2);
-         $decoded_metar['precipitation']['mm_6h'] = number_format($regs[1]*0.254, 2);
+   $decoded_metar['precipitation']['in_6h'] = number_format($regs[1]/100, 2);
+   $decoded_metar['precipitation']['mm_6h'] = number_format($regs[1]*0.254, 2);
        }
       } elseif(ereg('^7([0-9]{4})', $part, $regs)) {
-       /*
-        * Precipitation during last 24 hours in hundredths of an inch.
-        */
+
+  /*
+   * Precipitation during last 24 hours in hundredths of an inch.
+   */
        if ($regs[1] == '0000') {
          $decoded_metar['precipitation']['in_24h'] = -1;
          $decoded_metar['precipitation']['mm_24h'] = -1;
        } else {
-         $decoded_metar['precipitation']['in_24h'] = number_format($regs[1]/100, 2, 
'.', '');
-         $decoded_metar['precipitation']['mm_24h'] = number_format($regs[1]*0.254, 2, 
'.', '');
+   $decoded_metar['precipitation']['in_24h'] = number_format($regs[1]/100, 2, '.', 
+'');
+   $decoded_metar['precipitation']['mm_24h'] = number_format($regs[1]*0.254, 2, '.', 
+'');
        }
       } elseif(ereg('^4/([0-9]{3})', $part, $regs)) {
-       /*
-        * Snow depth in inches
-        */
+
+  /*
+   * Snow depth in inches
+   */
+
        if ($regs[1] == '0000') {
          $decoded_metar['precipitation']['snow_in'] = -1;
          $decoded_metar['precipitation']['snow_mm'] = -1;
@@ -493,40 +603,46 @@
          $decoded_metar['precipitation']['snow_mm'] = round($regs[1] * 25.4);
        }
       } else {
-       /*
-        * If we couldn't match the group, we assume that it was a
-        * remark.
-        */
+
+  /*
+   * If we couldn't match the group, we assume that it was a
+   * remark.
+   */
+
        $decoded_metar['remarks'] .= ' ' . $part;
       }
     }
-    /*
-     * Relative humidity
-     */
+
+  /*
+   * Relative humidity
+   */
+
     if (!empty($decoded_metar['temperature']['temp_c']) &&
        !empty($decoded_metar['temperature']['dew_c'])) {
       $decoded_metar['rel_humidity'] = number_format(100 * 
         (
-         610.710701 + 
-         44.4293573 * $decoded_metar['temperature']['dew_c'] +
-         1.41696846 * pow($decoded_metar['temperature']['dew_c'], 2) + 
-         0.0274759545 * pow($decoded_metar['temperature']['dew_c'], 3) + 
-         2.61145937E-4 * pow($decoded_metar['temperature']['dew_c'], 4) + 
-         2.85993708E-6 * pow($decoded_metar['temperature']['dew_c'], 5)
+         610.71 + 
+         44.429 * $decoded_metar['temperature']['dew_c'] +
+         1.4169 * pow($decoded_metar['temperature']['dew_c'], 2) + 
+         0.0274 * pow($decoded_metar['temperature']['dew_c'], 3) + 
+         2.6114E-4 * pow($decoded_metar['temperature']['dew_c'], 4) + 
+         2.8599E-6 * pow($decoded_metar['temperature']['dew_c'], 5)
         )
         /
         (
-         610.710701 + 
-         44.4293573 * $decoded_metar['temperature']['temp_c'] +
-         1.41696846 * pow($decoded_metar['temperature']['temp_c'], 2) + 
-         0.0274759545 * pow($decoded_metar['temperature']['temp_c'], 3) + 
-         2.61145937E-4 * pow($decoded_metar['temperature']['temp_c'], 4) + 
-         2.85993708E-6 * pow($decoded_metar['temperature']['temp_c'], 5)
+         610.71 + 
+         44.429 * $decoded_metar['temperature']['temp_c'] +
+         1.4169 * pow($decoded_metar['temperature']['temp_c'], 2) + 
+         0.0274 * pow($decoded_metar['temperature']['temp_c'], 3) + 
+         2.6114E-4 * pow($decoded_metar['temperature']['temp_c'], 4) + 
+         2.8599E-6 * pow($decoded_metar['temperature']['temp_c'], 5)
         ), 1);
     } 
     
-    /* Finally we store our decoded METAR in $this->decoded_metar so
-       that other methods can use it. */
+  /* Finally we store our decoded METAR in $this->decoded_metar so
+   * that other methods can use it. 
+   */
+
     $this->decoded_metar = $decoded_metar;
     return $decoded_metar;
   }


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