deltareg          164 core/gps.c     static t_regression deltareg;                          // heading and speed
deltareg          292 core/gps.c         regressionAdd           (&deltareg, now, pdelta.delta);                 // do the regression
deltareg          293 core/gps.c         double eta = regressionReverse (&deltareg, 0);                          // estimated time of arrival
deltareg          296 core/gps.c         if (abs(regressionChange (&deltareg))<0.5 || rest < 5.0) rest = 0.0;
deltareg         1310 core/gps.c         regressionInit (&deltareg, 20, buffer3);