diff --git a/pysiaf/source_data/NIRCam/nircam_siaf_aperture_definition.txt b/pysiaf/source_data/NIRCam/nircam_siaf_aperture_definition.txt
index c58346b9..c8e1b70d 100644
--- a/pysiaf/source_data/NIRCam/nircam_siaf_aperture_definition.txt
+++ b/pysiaf/source_data/NIRCam/nircam_siaf_aperture_definition.txt
@@ -191,9 +191,9 @@
                NRCA1_FP3MIMF ,  FULLSCA ,  1818.0 ,   229.0 ,     2048 ,     2048 ,   231.0 ,   229.0 ,                                     NRCA1_FULL ,         default
                NRCA2_FP4MIMF ,  FULLSCA ,   229.0 ,   229.0 ,     2048 ,     2048 ,   229.0 ,  1820.0 ,                                     NRCA2_FULL ,         default
                NRCA4_FP5MIMF ,  FULLSCA ,  1704.0 ,   345.0 ,     2048 ,     2048 ,  1704.0 ,  1704.0 ,                                     NRCA4_FULL ,         default
-                   NRCA1_FP6 ,  FULLSCA ,   221.5 ,  1813.5 ,     2048 ,     2048 ,  1827.5 ,  1813.5 ,                                     NRCA1_FULL ,         default
-              NRCA1_FP6_SUB8 , SUBARRAY ,   221.5 ,  1813.5 ,        8 ,        8 ,     4.5 ,     4.5 ,                                     NRCA1_FULL ,         default
-             NRCA1_FP6_SUB64 , SUBARRAY ,   221.5 ,  1813.5 ,       64 ,       64 ,    32.5 ,    32.5 ,                                     NRCA1_FULL ,         default
+                   NRCA1_FP6 ,  FULLSCA ,   220.5 ,  1813.5 ,     2048 ,     2048 ,  1828.5 ,  1813.5 ,                                     NRCA1_FULL ,         default
+              NRCA1_FP6_SUB8 , SUBARRAY ,   220.5 ,  1813.5 ,        8 ,        8 ,     4.5 ,     4.5 ,                                     NRCA1_FULL ,         default
+             NRCA1_FP6_SUB64 , SUBARRAY ,   220.5 ,  1813.5 ,       64 ,       64 ,    32.5 ,    32.5 ,                                     NRCA1_FULL ,         default
 # WFSC / MIMF Field Points (Module-B)
                 NRCB4_DHSPIL ,  FULLSCA ,  1003.0 ,  1122.0 ,     2048 ,     2048 ,  1046.0 ,  1122.0 ,                                     NRCB4_FULL ,         default
           NRCB4_DHSPIL_SUB96 , SUBARRAY ,  1003.0 ,  1122.0 ,       96 ,       96 ,    48.0 ,    49.0 ,                                     NRCB4_FULL ,         default