Jeb lives at 45.74, -47.11
KSP is at -74.575277777778, -0.1025
<?php
$jeb = [ 'type' => 'Point', 'coordinates' => [ 45.74, -47.11 ] ];
$ksp = [ 'type' => 'Point', 'coordinates' => [ -74.57527, -0.1025 ] ];
var_dump(haversine($jeb, $ksp, 600000));
?>