PIBY2             445 core/gps_math.c     long periode = (long) floor (phi / PIBY2 + 0.5);
PIBY2             446 core/gps_math.c     double reduced = phi - PIBY2 * periode;
PIBY2             460 core/gps_math.c     long periode = floor (phi / PIBY2 + 0.125);
PIBY2             461 core/gps_math.c     double reduced = phi - PIBY2 * periode;