CVS: phpweather phpweather.php,1.23,1.24

[Max H. <ir...@us...>]

Update of /cvsroot/phpweather/phpweather
In directory usw-pr-cvs1:/tmp/cvs-serv31635

Modified Files:
	phpweather.php 
Log Message:
Added heat index, thanks to David Kjellquist

Index: phpweather.php
===================================================================
RCS file: /cvsroot/phpweather/phpweather/phpweather.php,v
retrieving revision 1.23
retrieving revision 1.24
diff -u -3 -r1.23 -r1.24
--- phpweather.php	13 Apr 2002 13:23:41 -0000	1.23
+++ phpweather.php	12 May 2002 15:08:59 -0000	1.24
@@ -632,6 +632,35 @@
                       + 0.3965*$decoded_metar['temperature']['temp_c'] *
                       pow(($decoded_metar['wind']['miles_per_hour']/1.609), 0.16));
     }
+	
+	/*
+    * Compute heat index if temp > 70F
+    */
+    if (!empty($decoded_metar['temperature']['temp_f']) && $decoded_metar['temperature']['temp_f'] > '70' &&
+     !empty($decoded_metar['rel_humidity'])){
+     $decoded_metar['heatindex']['heatindex_f']=
+       number_format(-42.379 + 2.04901523*$decoded_metar['temperature']['temp_f']
+                       + 10.14333127*$decoded_metar['rel_humidity']
+                       - 0.22475541*$decoded_metar['temperature']['temp_f']
+		                   *$decoded_metar['rel_humidity']
+		       - 0.00683783*$decoded_metar['temperature']['temp_f']
+		                   *$decoded_metar['temperature']['temp_f']
+		       - 0.05481717*$decoded_metar['rel_humidity']
+		                   *$decoded_metar['rel_humidity']
+		       + 0.00122874*$decoded_metar['temperature']['temp_f']
+		                   *$decoded_metar['temperature']['temp_f']
+				   *$decoded_metar['rel_humidity']
+		       + 0.00085282*$decoded_metar['temperature']['temp_f']
+		                   *$decoded_metar['rel_humidity']
+				   *$decoded_metar['rel_humidity']
+		       - 1.99*pow(10,-6)*$decoded_metar['temperature']['temp_f']
+		             *$decoded_metar['temperature']['temp_f']
+			     *$decoded_metar['rel_humidity']
+			     *$decoded_metar['rel_humidity']);
+     $decoded_metar['heatindex']['heatindex_c']=
+       number_format(($decoded_metar['heatindex']['heatindex_f'] - 32) / 1.8);
+    }
+	
     
     /* Finally we store our decoded METAR in $this->decoded_metar so
      * that other methods can use it.