Index: /tags/ipp-ps1-20210510/psastro/src/psastroLoadGhosts.c
===================================================================
--- /tags/ipp-ps1-20210510/psastro/src/psastroLoadGhosts.c	(revision 41641)
+++ /tags/ipp-ps1-20210510/psastro/src/psastroLoadGhosts.c	(revision 41642)
@@ -332,5 +332,5 @@
      	            double theta0 = atan2(ref->FP->y,ref->FP->x);
 
-                    if(mirCheck) {
+                    if((mirCheck) & (!cenChip)) {
                          //TdB: first mirror the reference star positions (around the 0,0 pixel) using the radial offset coefficients and the ghost/star angle
 		        double ghost_offset_rad = psPolynomial1DEval (mirrorRad, rSrc);
@@ -342,5 +342,5 @@
 		        ghost->FP->y = ghost_y_fpa_mirror + psPolynomial2DEval(centerY, ghost_x_fpa_mirror, ghost_y_fpa_mirror);
                     }  
-                    if(!mirCheck) {
+                    if((!mirCheck) | cenChip) {
                         //Use the old-style ghost position determination
                         ghost->FP->x = -ref->FP->x + psPolynomial2DEval(centerX, -ref->FP->x, -ref->FP->y);