/**
* Finds the current location of the sun based on the observer location
*
* @param Predict_QTH $qth The observer location
* @param int $daynum The daynum or null to use the current daynum
*
* @return Predict_ObsSet
*/
public static function FindSun(Predict_QTH $qth, $daynum = null)
{
if ($daynum === null) {
$daynum = Predict_Time::get_current_daynum();
}
$obs_geodetic = new Predict_Geodetic();
$obs_geodetic->lon = $qth->lon * Predict::de2ra;
$obs_geodetic->lat = $qth->lat * Predict::de2ra;
$obs_geodetic->alt = $qth->alt / 1000.0;
$obs_geodetic->theta = 0;
$solar_vector = new Predict_Vector();
$zero_vector = new Predict_Vector();
$solar_set = new Predict_ObsSet();
self::Calculate_Solar_Position($daynum, $solar_vector);
Predict_SGPObs::Calculate_Obs($daynum, $solar_vector, $zero_vector, $obs_geodetic, $solar_set);
$solar_set->az = Predict_Math::Degrees($solar_set->az);
$solar_set->el = Predict_Math::Degrees($solar_set->el);
return $solar_set;
}
require_once 'Predict/Time.php';
// Set to true to profile
$profile = true;
// Example check at the top of your application for enabling profiling
if ($profile && extension_loaded('xhprof')) {
$xproflib = './xhprof_lib';
include_once $xproflib . '/utils/xhprof_lib.php';
include_once $xproflib . '/utils/xhprof_runs.php';
xhprof_enable(XHPROF_FLAGS_CPU + XHPROF_FLAGS_MEMORY);
function stop_xhprof_profiling()
{
$xhprofData = xhprof_disable();
$xhprofNameSpace = 'predict';
$xhprofRuns = new XHProfRuns_Default();
$xhprofRunID = $xhprofRuns->save_run($xhprofData, $xhprofNameSpace);
}
register_shutdown_function('stop_xhprof_profiling');
}
$start = microtime(true);
$predict = new Predict();
$qth = new Predict_QTH();
$qth->lat = 37.655;
$qth->lon = -122.407;
$qth->alt = 0;
$tleFile = file('examples/iss.tle');
$tle = new Predict_TLE($tleFile[0], $tleFile[1], $tleFile[2]);
$sat = new Predict_Sat($tle);
$now = Predict_Time::get_current_daynum();
$results = $predict->get_passes($sat, $qth, $now, 10);
echo "Execution time: " . number_format((microtime(true) - $start) * 1000, 2) . "ms\n";
exit;
/**
* Predict the next pass.
*
* This function simply wraps the get_pass function using the current time
* as parameter.
*
* Note: the data in sat will be corrupt (future) and must be refreshed
* by the caller, if the caller will need it later on (eg. if the caller
* is GtkSatList).
*
* @param Predict_Sat $sat The satellite data.
* @param Predict_QTH $qth The observer data.
* @param int $maxdt The maximum number of days to look ahead.
*
* @return Predict_Pass Pointer instance or NULL if no pass can be
* found.
*/
public function get_next_pass(Predict_Sat $sat, Predict_QTH $qth, $maxdt)
{
/* get the current time and call the get_pass function */
$now = Predict_Time::get_current_daynum();
return $this->get_pass($sat, $qth, $now, $maxdt);
}
