diff --git a/ObservationSim/Config/Header/ImageHeader.py b/ObservationSim/Config/Header/ImageHeader.py
index 420caf0966cd464547f5dee9487d304b37aa52b9..4a78f2880a08e8df50131037baef707eafdd34f3 100644
--- a/ObservationSim/Config/Header/ImageHeader.py
+++ b/ObservationSim/Config/Header/ImageHeader.py
@@ -233,7 +233,7 @@ def WCS_def(xlen = 9216, ylen = 9232, gapy = 898.0, gapx1 = 534, gapx2 = 1309, r
 
 
 
-def generatePrimaryHeader(xlen = 9216, ylen = 9232, pointNum = '1', ra = 60, dec = -40, psize = 0.074, row_num = 1, col_num = 1, date='200930', time_obs='120000', im_type = 'MS', exptime=150.):
+def generatePrimaryHeader(xlen = 9216, ylen = 9232, pointNum = '1', ra = 60, dec = -40, psize = 0.074, row_num = 1, col_num = 1, date='200930', time_obs='120000', im_type = 'MS', exptime=150., sat_pos = [0.,0.,0.], sat_vel = [0., 0., 0.]):
 
     # array_size1, array_size2, flux, sigma = int(argv[1]), int(argv[2]), 1000.0, 5.0
 
@@ -294,6 +294,18 @@ def generatePrimaryHeader(xlen = 9216, ylen = 9232, pointNum = '1', ra = 60, dec
     tend = Time(tstart.mjd + h_prim['EXPTIME']/86400., format="mjd")
     h_prim['EXPEND'] = round(tend.mjd, 5)
 
+
+    h_prim['POSI0_X'] = sat_pos[0]
+    h_prim['POSI0_Y'] = sat_pos[1]
+    h_prim['POSI0_Z'] = sat_pos[2]
+
+    h_prim['VELO0_X'] = sat_vel[0]
+    h_prim['VELO0_Y'] = sat_vel[1]
+    h_prim['VELO0_Z'] = sat_vel[2]
+    h_prim['RA_PNT0'] = ra_hms
+    h_prim['DEC_PNT0'] = dec_hms
+
+
     return h_prim
 
 def generateExtensionHeader(xlen = 9216, ylen = 9232,ra = 60, dec = -40, pa = -23.433, gain = 1.0, readout = 5.0, dark = 0.02, saturation=90000, psize = 0.074, row_num = 1, col_num = 1, extName='SCI'):
diff --git a/ObservationSim/ObservationSim.py b/ObservationSim/ObservationSim.py
index c8f44d8a5873c4a8d340c2e5920baa1e94cb5cc8..94396ae53708fec75658792a66d2db62b2451694 100755
--- a/ObservationSim/ObservationSim.py
+++ b/ObservationSim/ObservationSim.py
@@ -120,6 +120,7 @@ class Observation(object):
             bright_obj = 0
             dim_obj = 0
             for j in range(self.nobj):
+                break
                 # if j >= 100:
                 #     break
                 obj = self.cat.objs[j]
@@ -263,7 +264,9 @@ class Observation(object):
                 date=date_obs,
                 time_obs=time_obs,
                 exptime=pointing.exp_time,
-                im_type='MS')
+                im_type='MS',
+                sat_pos=[pointing.sat_x, pointing.sat_y, pointing.sat_z],
+                sat_vel=[pointing.sat_vx, pointing.sat_vy, pointing.sat_vz])
             h_ext = generateExtensionHeader(
                 xlen=chip.npix_x, 
                 ylen=chip.npix_y,