Data Set Overview
  =================
    This shape model of Mimas is based on 771 Cassini Imaging Science
    Subsystem narrow angle camera (ISSNA) images taken in 2005-2011, 9 Cassini
    Imaging Science Subsystem wide angle camera (ISSWA) images taken in 2010,
    and 17 Voyager 1 Imaging Science Subsystem Narrow (ISSN) camera images
    taken in 1980.
 
    Coordinate system:
 
    BODY601_POLE_RA      = (    40.66    -0.036      0.  )
    BODY601_POLE_DEC     = (   +83.52    -0.004      0.  )
    BODY601_PM           = (   337.46  +381.9945550  0.  )
    BODY601_LONG_AXIS    = (     0.                      )
    BODY601_NUT_PREC_RA  = ( 0. 0. +13.56  0.    0.   0. 0. 0. 0. )
    BODY601_NUT_PREC_DEC = ( 0. 0.  -1.53  0.    0.   0. 0. 0. 0. )
    BODY601_NUT_PREC_PM  = ( 0. 0. -13.48  0. -44.85  0. 0. 0. 0. )
 
    (For help in interpreting the values of the SPICE assignments above, see
    the document 'PCK Required Reading' (PCK.REQ), available at NAIF and in
    the document directory of this data set.)
 
    The parameters of the model are as follows:
 
    Number of landmarks = 684
    RMS position uncertainty = 144 m/dof (degree of freedom)
    Pointing uncertainty:  .059 mrad
    Pointing residual:  .259 mrad
    Number of observations:  86262
    Observations per landmark:  126.1
    RMS landmark location residual:  246 m/dof
 
    The models were originally prepared in the Implicitly Connected
    Quadrilateral (ICQ) format.  Vertex-facet format versions, derived from
    the ICQ versions, are also provided.  The filenames are
    mimas_quad512q.tab and mimas_ver512q.tab, where 512 is the value of Q (an
    indicator of the resolution).  See below for the full definition of Q and
    the ICQ format.  For additional information about the shape models, see
    Gaskell et al. (2008).
 
    The file 'mimasimagelist.tab' is a list of the Cassini ISSNA and ISSWA and
    Voyager 1 ISSN images used to generate this model.  These images are
    archived in PDS under the data set IDs CO-S-ISSNA/ISSWA-2-EDR-V1.0
    (Cassini) and VG1/VG2-S-ISS-2-EDR-V2.0 (Voyager 1).
 
    A text file, 'icqmodel.asc' is provided in the 'document' directory which
    describes the ICQ format and the derivation of the vertex-facet versions.
 
    Modification History
    ====================
 
    Version 1.0 of this model was archived in 2011.  The model was updated
    with the inclusion of additional images, and archived as V2.0 in 2013.
 
    References
    ==========
 
    Gaskell, R.W., O.S. Barnouin-Jha, D.J. Scheeres, A.S. Konopliv, T. Mukai,
    S. Abe, J. Saito, M. Ishiguro, T. Kubota, T. Hashimoto, J. Kawaguchi, M.
    Yoshikawa, K. Shirakawa, T. Kominato, N. Hirata, and H. Demura,
    Characterizing and navigating small bodies with imaging data, Meteoritics
    and Planetary Science, vol. 43, Issue 6, p. 1049-1061, 2008.

Confidence Level Overview
  =========================
    Note that the vertex-facet versions of the model have some duplicate
    vertices on the edges and corners of the cube.  The duplicate vertices are
    not used in the facet table, resulting in the presence of some vertices in
    the vertex table which do not appear in the facet table.  This does not
    affect the correctness of the vertex-facet version.