These are the code changes needed for fqpm 1. tao/offld.c :Change the limits on tip/tilt offloading Change the line: if (fabs(ra) > 2.5 || fabs(dec) > 2.5) { TO: // FQPM if (fabs(ra) > (2.5*3.3) || fabs(dec) > (2.5*3.3)) { 2. tao/offld.c: re-scale the focus offload After the line: focus = (sum1/sum2) * 0.356; Add: // FQPM rescale focus focus = focus*1.89; 3.. tao /offld.c: Re-scale the tip/tilt offload After the lines: ra = avg_msg->pos.ttm_a*cos(q) - avg_msg->pos.ttm_b*sin(q); dec = -avg_msg->pos.ttm_a*sin(q) - avg_msg->pos.ttm_b*cos(q); Add the lines: // FQPM: Rescale by 3.33 ra = ra * 3.33; // FQPM dec = dec * 3.33; // FQPM send_offload (TTM, ra, dec); 4. aoctl/tao/tao.h: Change the scale of image motion for SSMS Comment out the line: #define ImageMotionPerVirtualMotion 0.025 // Normal Add the line: #define ImageMotionPerVirtualMotion (0.025*3.33) // FQPM 5. aoctl/tao/tao.h: Change the nominal Cass ring angle Comment out the line: #define CASS_RING_ANGLE 336.0 /* nominal Cassegrain ring angle */ Add the line: #define CASS_RING_ANGLE (336.0-135.0) /* FQPM modified */