mirror of
https://github.com/wavelog/wavelog.git
synced 2026-03-22 02:14:13 +00:00
372 lines
10 KiB
PHP
372 lines
10 KiB
PHP
<?php if (! defined('BASEPATH')) exit('No direct script access allowed');
|
|
|
|
class Qra {
|
|
|
|
/*
|
|
* Class Description: QRA handles manipulation of the Gridsquares used within amateur radio
|
|
*
|
|
* Units of measurement are the following
|
|
*
|
|
* Info: Distance Function
|
|
*
|
|
* M = Miles
|
|
* K = Kilometers
|
|
* N = Nautical Miles
|
|
*/
|
|
|
|
// Name: qra2latlong
|
|
// Task: convert qra to lat/long
|
|
function qra2latlong($strQRA) {
|
|
return qra2latlong($strQRA);
|
|
}
|
|
|
|
// calculate the bearing between two squares
|
|
function bearing($tx, $rx, $unit = 'M', $ant_path = null) {
|
|
$my = qra2latlong($tx);
|
|
$stn = qra2latlong($rx);
|
|
|
|
if ($my !== false && $stn !== false) {
|
|
$bearing = bearing($my[0], $my[1], $stn[0], $stn[1], $unit, $ant_path);
|
|
return $bearing;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function: calculate the distance between two gridsqaures
|
|
*
|
|
* Inputs are QRA's TX and TX and the unit
|
|
*
|
|
*/
|
|
function distance($tx, $rx, $unit = 'M', $ant_path = null) {
|
|
// Calc LatLongs
|
|
$my = qra2latlong($tx);
|
|
$stn = qra2latlong($rx);
|
|
|
|
// Check if qra2latlong returned valid values
|
|
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, $ant_path);
|
|
} catch (Exception $e) {
|
|
$total_distance = 0;
|
|
}
|
|
|
|
// Return the distance
|
|
return $total_distance;
|
|
} else {
|
|
// Handle the case where qra2latlong did not return valid values
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function returns just the bearing
|
|
* Input locator1 and locator2
|
|
*/
|
|
function get_bearing($tx, $rx, $ant_path = null) {
|
|
$my = qra2latlong($tx);
|
|
$stn = qra2latlong($rx);
|
|
return get_bearing($my[0], $my[1], $stn[0], $stn[1], $ant_path);
|
|
}
|
|
|
|
/*
|
|
Find the Midpoint between two gridsquares using lat / long
|
|
|
|
Needs following passed
|
|
|
|
$coords[]=array('lat' => '53.344104','lng'=>'-6.2674937');
|
|
$coords[]=array('lat' => '51.5081289','lng'=>'-0.128005');
|
|
|
|
*/
|
|
|
|
function get_midpoint($coords) {
|
|
$count_coords = count($coords);
|
|
$xcos = 0.0;
|
|
$ycos = 0.0;
|
|
$zsin = 0.0;
|
|
|
|
foreach ($coords as $lnglat) {
|
|
$lat = $lnglat['lat'] * pi() / 180;
|
|
$lon = $lnglat['lng'] * pi() / 180;
|
|
|
|
$acos = cos($lat) * cos($lon);
|
|
$bcos = cos($lat) * sin($lon);
|
|
$csin = sin($lat);
|
|
$xcos += $acos;
|
|
$ycos += $bcos;
|
|
$zsin += $csin;
|
|
}
|
|
|
|
$xcos /= $count_coords;
|
|
$ycos /= $count_coords;
|
|
$zsin /= $count_coords;
|
|
$lon = atan2($ycos, $xcos);
|
|
$sqrt = sqrt($xcos * $xcos + $ycos * $ycos);
|
|
$lat = atan2($zsin, $sqrt);
|
|
|
|
return array($lat * 180 / pi(), $lon * 180 / pi());
|
|
}
|
|
|
|
function echoQrbCalcLink($mygrid, $grid, $vucc, $isVisitor = false) {
|
|
$echo = "";
|
|
if (!empty($grid)) {
|
|
$echo = $grid;
|
|
$echo .= (!$isVisitor) ? (' <a href="javascript:spawnQrbCalculator(\'' . $mygrid . '\',\'' . $grid . '\')"><i class="fas fa-globe"></i></a>') : '';
|
|
} else if (!empty($vucc)) {
|
|
$echo = $vucc;
|
|
$echo .= (!$isVisitor) ? (' <a href="javascript:spawnQrbCalculator(\'' . $mygrid . '\',\'' . $vucc . '\')"><i class="fas fa-globe"></i></a>') : '';
|
|
}
|
|
return $echo;
|
|
}
|
|
|
|
/**
|
|
* Function to calculate the maximum distance in a bunch of QSOs
|
|
*
|
|
* @param string $mylocator Maidenhead locator of the station
|
|
* @param object $qsos Object of QSOs
|
|
* @param string $unit Unit of measurement
|
|
*
|
|
* @return object $maxdistanceqso Object of the QSO with the maximum distance
|
|
* @return float $maxdistance Maximum distance
|
|
*/
|
|
|
|
function getMaxDistanceQSO($mylocator, $qsos, $unit = "M") {
|
|
//return nothing for empty QSO set
|
|
if (count($qsos->result()) < 1) {
|
|
return null;
|
|
}
|
|
|
|
//collect maximum data
|
|
$maxdistance = 0;
|
|
$maxdistanceqso = null;
|
|
|
|
//iterate through all qsos
|
|
foreach ($qsos->result() as $row) {
|
|
|
|
if (empty($row->COL_GRIDSQUARE)) {
|
|
continue;
|
|
}
|
|
|
|
//get distance in kilometers
|
|
$distance = $this->distance($mylocator, $row->COL_GRIDSQUARE, $unit);
|
|
|
|
//store new highscore if present
|
|
if ($distance > $maxdistance) {
|
|
$maxdistance = $distance;
|
|
$maxdistanceqso = $row;
|
|
}
|
|
}
|
|
|
|
$result = [];
|
|
$result['qso'] = $maxdistanceqso;
|
|
$result['distance'] = $maxdistance;
|
|
|
|
//return findings
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Function to calculate the center of a bunch of coordinates
|
|
* Source: https://www.phpsnippet.com/snippet/center-point-of-multiple-gps-coordinates-with-php
|
|
*
|
|
* @param array $coordinates Array of coordinates [latitude, longitude]
|
|
* Example:
|
|
* $coordinates = [
|
|
* [37.7797, -122.41924],
|
|
* [37.77323, -122.41114],
|
|
* [37.79203, -122.40864],
|
|
* [37.7952, -122.4222]
|
|
* ];
|
|
*
|
|
* @return array [latitude, longitude] Center of the coordinates
|
|
*/
|
|
|
|
function getCenterLatLng($coordinates) {
|
|
$x = $y = $z = 0;
|
|
$n = count($coordinates);
|
|
foreach ($coordinates as $point)
|
|
{
|
|
$lt = $point[0] * pi() / 180;
|
|
$lg = $point[1] * pi() / 180;
|
|
$x += cos($lt) * cos($lg);
|
|
$y += cos($lt) * sin($lg);
|
|
$z += sin($lt);
|
|
}
|
|
$x /= $n;
|
|
$y /= $n;
|
|
|
|
return [atan2(($z / $n), sqrt($x * $x + $y * $y)) * 180 / pi(), atan2($y, $x) * 180 / pi()];
|
|
}
|
|
|
|
function validate_grid($grid) {
|
|
// (Try to) Detect placeholders like AA00aa (returned from qrz.com for example)
|
|
if (strlen($grid) == 6 && strtoupper($grid) == 'AA00AA') {
|
|
return false;
|
|
}
|
|
// Allow 6-digit locator
|
|
if (preg_match('/^[A-Ra-r]{2}[0-9]{2}[A-Za-z]{2}$/', $grid)) return true;
|
|
// Allow 4-digit locator
|
|
else if (preg_match('/^[A-Ra-r]{2}[0-9]{2}$/', $grid)) return true;
|
|
// Allow 4-digit grid line
|
|
else if (preg_match('/^[A-Ra-r]{2}[0-9]{2},[A-Ra-r]{2}[0-9]{2}$/', $grid)) return true;
|
|
// Allow 4-digit grid corner
|
|
else if (preg_match('/^[A-Ra-r]{2}[0-9]{2},[A-Ra-r]{2}[0-9]{2},[A-Ra-r]{2}[0-9]{2},[A-Ra-r]{2}[0-9]{2}$/', $grid)) return true;
|
|
// Allow 2-digit locator
|
|
else if (preg_match('/^[A-Ra-r]{2}$/', $grid)) return true;
|
|
// Allow 8-digit locator
|
|
else if (preg_match('/^[A-Ra-r]{2}[0-9]{2}[A-Za-z]{2}[0-9]{2}$/', $grid)) return true;
|
|
// Allow 10-digit locator
|
|
else if (preg_match('/^[A-Ra-r]{2}[0-9]{2}[A-Za-z]{2}[0-9]{2}[A-Za-z]{2}$/', $grid)) return true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
function calc_distance($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 == "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") {
|
|
$dist *= 0.8684;
|
|
}
|
|
if ((is_nan($dist)) || !(is_numeric($dist))) { // Special-Case, catch same grid and/or Errors
|
|
$dist = 0;
|
|
}
|
|
return round($dist, 1);
|
|
}
|
|
|
|
function bearing($lat1, $lon1, $lat2, $lon2, $unit = 'M', $ant_path = null) {
|
|
$dist = calc_distance($lat1, $lon1, $lat2, $lon2, $unit, $ant_path);
|
|
$dist = round($dist, 0);
|
|
|
|
$bearing = get_bearing($lat1, $lon1, $lat2, $lon2);
|
|
if ($ant_path == 'L') {
|
|
$bearing = ($bearing + 180) % 360;
|
|
}
|
|
|
|
$dirs = array("N", "E", "S", "W");
|
|
|
|
$rounded = round($bearing / 22.5) % 16;
|
|
if (($rounded % 4) == 0) {
|
|
$dir = $dirs[$rounded / 4];
|
|
} else {
|
|
$dir = $dirs[2 * floor(((floor($rounded / 4) + 1) % 4) / 2)];
|
|
$dir .= $dirs[1 + 2 * floor($rounded / 8)];
|
|
#if ($rounded % 2 == 1)
|
|
# $dir = $dirs[round_to_int($rounded/4) % 4] . "-" . $dir;
|
|
}
|
|
$var_dist = "";
|
|
#return $dir;
|
|
if (isset($dist)) {
|
|
$var_dist = $dist;
|
|
switch ($unit) {
|
|
case 'M':
|
|
$var_dist .= " miles";
|
|
break;
|
|
case 'N':
|
|
$var_dist .= " nautic miles";
|
|
break;
|
|
case 'K':
|
|
$var_dist .= " kilometers";
|
|
break;
|
|
}
|
|
}
|
|
return round($bearing, 0) . "º " . $dir . " " . $var_dist;
|
|
}
|
|
|
|
function get_bearing($lat1, $lon1, $lat2, $lon2) {
|
|
return (int)(rad2deg(atan2(sin(deg2rad($lon2) - deg2rad($lon1)) * cos(deg2rad($lat2)), cos(deg2rad($lat1)) * sin(deg2rad($lat2)) - sin(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($lon2) - deg2rad($lon1)))) + 360) % 360;
|
|
}
|
|
|
|
function qra2latlong($strQRA) {
|
|
$strQRA = preg_replace('/\s+/', '', $strQRA);
|
|
if (substr_count($strQRA, ',') > 0) {
|
|
if (substr_count($strQRA, ',') == 3) {
|
|
// Handle grid corners
|
|
$grids = explode(',', $strQRA);
|
|
$gridlengths = array(strlen($grids[0]), strlen($grids[1]), strlen($grids[2]), strlen($grids[3]));
|
|
$same = array_count_values($gridlengths);
|
|
if (count($same) != 1) {
|
|
return false;
|
|
}
|
|
$coords = array(0, 0);
|
|
for ($i = 0; $i < 4; $i++) {
|
|
$cornercoords[$i] = qra2latlong($grids[$i]);
|
|
$coords[0] += $cornercoords[$i][0];
|
|
$coords[1] += $cornercoords[$i][1];
|
|
}
|
|
return array(round($coords[0] / 4), round($coords[1] / 4));
|
|
} else if (substr_count($strQRA, ',') == 1) {
|
|
// Handle grid lines
|
|
$grids = explode(',', $strQRA);
|
|
if (strlen($grids[0]) != strlen($grids[1])) {
|
|
return false;
|
|
}
|
|
$coords = array(0, 0);
|
|
for ($i = 0; $i < 2; $i++) {
|
|
$linecoords[$i] = qra2latlong($grids[$i]);
|
|
}
|
|
if ($linecoords[0][0] != $linecoords[1][0]) {
|
|
$coords[0] = round((($linecoords[0][0] + $linecoords[1][0]) / 2), 1);
|
|
} else {
|
|
$coords[0] = round($linecoords[0][0], 1);
|
|
}
|
|
if ($linecoords[0][1] != $linecoords[1][1]) {
|
|
$coords[1] = round(($linecoords[0][1] + $linecoords[1][1]) / 2);
|
|
} else {
|
|
$coords[1] = round($linecoords[0][1]);
|
|
}
|
|
return $coords;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ((strlen($strQRA) % 2 == 0) && (strlen($strQRA) <= 10)) { // Check if QRA is EVEN (the % 2 does that) and smaller/equal 8
|
|
$strQRA = strtoupper($strQRA);
|
|
if (strlen($strQRA) == 2) $strQRA .= "55"; // Only 2 Chars? Fill with center "55"
|
|
if (strlen($strQRA) == 4) $strQRA .= "LL"; // Only 4 Chars? Fill with center "LL" as only A-R allowed
|
|
if (strlen($strQRA) == 6) $strQRA .= "55"; // Only 6 Chars? Fill with center "55"
|
|
if (strlen($strQRA) == 8) $strQRA .= "LL"; // Only 8 Chars? Fill with center "LL" as only A-R allowed
|
|
|
|
if (!preg_match('/^[A-R]{2}[0-9]{2}[A-X]{2}[0-9]{2}[A-X]{2}$/', $strQRA)) {
|
|
return false;
|
|
}
|
|
|
|
list($a, $b, $c, $d, $e, $f, $g, $h, $i, $j) = str_split($strQRA, 1); // Maidenhead is always alternating. e.g. "AA00AA00AA00" - doesn't matter how deep. 2 chars, 2 numbers, etc.
|
|
$a = ord($a) - ord('A');
|
|
$b = ord($b) - ord('A');
|
|
$c = ord($c) - ord('0');
|
|
$d = ord($d) - ord('0');
|
|
$e = ord($e) - ord('A');
|
|
$f = ord($f) - ord('A');
|
|
$g = ord($g) - ord('0');
|
|
$h = ord($h) - ord('0');
|
|
$i = ord($i) - ord('A');
|
|
$j = ord($j) - ord('A');
|
|
|
|
$nLong = ($a * 20) + ($c * 2) + ($e / 12) + ($g / 120) + ($i / 2880) - 180;
|
|
$nLat = ($b * 10) + $d + ($f / 24) + ($h / 240) + ($j / 5760) - 90;
|
|
|
|
$arLatLong = array($nLat, $nLong);
|
|
return $arLatLong;
|
|
} else {
|
|
return array(0, 0);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* End of file Qra.php */
|