east               84 core/gps.c         double east;
east              101 core/gps.c         r->east = g->lon_w * EARTH * cos(lat_w/RHO);
east              106 core/gps.c         p->delta = sqrt (r->north*r->north + r->east*r->east);
east              107 core/gps.c         p->alpha = arctan2 (r->east, r->north);
east              113 core/gps.c         r->east = sin(p->alpha) * p->delta;