north              81 core/gps.c         double north;
north              98 core/gps.c         r->north= g->lat_w * EARTH;
north             104 core/gps.c         p->delta = sqrt (r->north*r->north + r->east*r->east);
north             105 core/gps.c         p->alpha = arctan2 (r->east, r->north);
north             112 core/gps.c         r->north= cos(p->alpha) * p->delta;