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include ant_path in the distance calculation

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HB9HIL
2024-11-05 10:29:37 +01:00
parent 91f0cdf5dd
commit c98a35137f
1 changed files with 9 additions and 3 deletions
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12
application/libraries/Qra.php
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@@ -39,7 +39,7 @@ class Qra {
* Inputs are QRA's TX and TX and the unit
*
*/
function distance($tx, $rx, $unit = 'M') {
function distance($tx, $rx, $unit = 'M', $ant_path = null) {
// Calc LatLongs
$my = qra2latlong($tx);
$stn = qra2latlong($rx);
@@ -48,7 +48,7 @@ class Qra {
if ($my && $stn) {
// Feed in Lat Longs plus the unit type
try {
$total_distance = calc_distance($my[0], $my[1], $stn[0], $stn[1], $unit);
$total_distance = calc_distance($my[0], $my[1], $stn[0], $stn[1], $unit, $ant_path);
} catch (Exception $e) {
$total_distance = 0;
}
@@ -202,13 +202,19 @@ class Qra {
}
function calc_distance($lat1, $lon1, $lat2, $lon2, $unit = 'M') {
function calc_distance($lat1, $lon1, $lat2, $lon2, $unit = 'M', $ant_path = null) {
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$dist = $dist * 60 * 1.1515;
if ($ant_path != null) {
if ($ant_path == "L") { // we only need to calculate the distance for long paths, all other paths are the same
$dist = 24880 - $dist;
}
}
if ($unit == "K") {
$dist *= 1.609344;
} else if ($unit == "N") {