public static function Fad03($t) {
    $a;

    /* Mean elongation of the Moon from the Sun (IERS Conventions 2003). */
    $a = fmod(1072260.703692 +
                    $t * ( 1602961601.2090 +
                    $t * ( - 6.3706 +
                    $t * ( 0.006593 +
                    $t * ( - 0.00003169 ) ) ) ), TURNAS) * DAS2R;

    return $a;
  }