CVS: phpweather phpweather.php,1.17,1.18

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

Update of /cvsroot/phpweather/phpweather
In directory usw-pr-cvs1:/tmp/cvs-serv3016

Modified Files:
	phpweather.php 
Log Message:
Added windchill factor

Index: phpweather.php
===================================================================
RCS file: /cvsroot/phpweather/phpweather/phpweather.php,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -3 -r1.17 -r1.18
--- phpweather.php	20 Mar 2002 19:26:50 -0000	1.17
+++ phpweather.php	24 Mar 2002 17:25:35 -0000	1.18
@@ -681,6 +681,21 @@
                                + 2)), 1);
     } 
     
+    
+    /*
+    *  Compute windchill if temp < 40f and windspeed > 3 mph
+    */
+    if ($decoded_metar['temperature']['temp_f'] <= '40' && $decoded_metar['wind']['miles_per_hour'] > '3'){
+        $decoded_metar['windchill']['windchill_f'] = 
+            number_format(35.74 + 0.6215*$decoded_metar['temperature']['temp_f'] 
+            - 35.75*pow($decoded_metar['wind']['miles_per_hour'],0.16) 
+            + 0.4275*$decoded_metar['temperature']['temp_f']*pow($decoded_metar['wind']['miles_per_hour'],0.16));
+        $decoded_metar['windchill']['windchill_c'] = 
+            number_format(13.112 + 0.6215*$decoded_metar['temperature']['temp_c']
+            - 13.37*pow(($decoded_metar['wind']['miles_per_hour']/1.609),0.16)
+            + 0.3965*$decoded_metar['temperature']['temp_c']*pow(($decoded_metar['wind']['miles_per_hour']/1.609),0.16));
+    }
+    
     /* Finally we store our decoded METAR in $this->decoded_metar so
      * that other methods can use it. 
      */