note 59282 modified in ref.math by felipe
| From: | felipe@php.net | Date: | Mon, 04 Feb 2008 20:25:01 +0000 |
| Subject: | note 59282 modified in ref.math by felipe | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-135772@lists.php.net to get a copy of this message | ||
If you're an aviator and needs to calculate windcorrection angles and groundspeed (e.g. during
flightplanning) this can be very useful.
$windcorrection = rad2deg(asin((($windspeed * (sin(deg2rad($tt - ($winddirection-180))))/$tas))));
$groundspeed = $tas*cos(deg2rad($windcorrection)) +
$windspeed*cos(deg2rad($tt-($winddirection-180)));
You can probably write these lines more beautiful, but they work!
--was--
If you´re an aviator and needs to calculate windcorrection angles and groundspeed (e.g. during
flightplanning) this can be very useful.
$windcorrection = rad2deg(asin((($windspeed * (sin(deg2rad($tt - ($winddirection-180))))/$tas))));
$groundspeed = $tas*cos(deg2rad($windcorrection)) +
$windspeed*cos(deg2rad($tt-($winddirection-180)));
You can probably write these lines more beautiful, but they work!
http://php.net/manual/en/ref.math.php