A sample .SUM file looks like

W46908480918                                                                           image name
2014 NOV 12 17:20:03.128                                                               utc
  2048  2048   500 65535                                       NPX, NLN, THRSH         pic size, lower and upper dn thresholds
    0.1356800000D+03    0.1044000000D+04    0.9380000000D+03   MMFL, CTR               focal length, px/ln center (boresight/optical axis)
   -0.9665063720D+01    0.1326644487D+02   -0.6673084308D+01   SCOBJ                   s/c-object vector (body fixed)
   -0.6442479111D+00   -0.1829032409D-01    0.7645979944D+00   CX                      pixel unit vector (body fixed)
    0.5935707119D+00    0.6184779444D+00    0.5149357652D+00   CY                      linel unit vector (body fixed)
   -0.4823053379D+00    0.7855892670D+00   -0.3875965231D+00   CZ                      boresight unit vector (body fixed)
    0.7254908676D+00   -0.3292717307D+00    0.6043534796D+00   SZ                      sun unit vector (body fixed)
  74.07410   0.00000   0.00000   0.00000  74.07410   0.00000   K-MATRIX         
    0.00000D+00    0.00000D+00    0.00000D+00    0.00000D+00   DISTORTION              always zero these days (distortion comes in elsewhere)
    0.1007758363D-02    0.1482813397D-02    0.8902614968D-03   SIGMA_VSO               formal scobj uncertainty
    0.3071768580D-04    0.3093941486D-04    0.1565302183D-04   SIGMA_PTG               formal pointing uncertainty
LANDMARKS                                                                       
AO0001   2049.39    668.15                                                      
AO0002   2020.70    644.81                                                      
AO0003   2035.17    708.66                                                             landmark px/ln centers
BD0009   1902.39    884.05                                                      
BD0010   1891.13    909.86                                                      
   ...
EK0022    675.73   1371.97                                                      
EQ0088    721.76    738.13                                                      
FI0002    727.77    220.40                                                      
LIMB FITS                                                                              landmark-on-limb centers (none here)
END FILE