Data Set Overview  :  This shape model of asteroid Ceres is based on images taken from  Jan 2015 to October 2015 by the Framing Camera (FC2) on the Dawn  spacecraft. Additional information about the method for  deriving the model may be found in [GASKELLETAL2008], [GASKELL2005]  and [GASKELLETAL2007]. The version of the model included here was  prepared on December 19, 2017 and updated on October 19, 2018.   A high-resolution global topography model of Ceres was determined as  a part of Dawn gravity science investigation using the  Stereo-photoclinometry (SPC) technique developed at the Jet Propulsion  Laboratory by processing Dawn's Framing Camera data acquired during  Approach to post-Low Altitude Mapping Orbit (LAMO) phases of the  mission. A total of about 38,000 images were processed with image  resolutions ranging from 35.6 km to 35 m. The Approach and Survey data  were mainly used to compute the a priori shape model and were not used  to compute the final global topography model as their contribution was  almost negligible. The final topography (the current delivery) model  was produced with 100-m ground sample distance using images with 140 m  and 35 m pixel resolutions acquired during High Altitude Mapping Orbit  (HAMO) to post-LAMO phases of the mission. This process required  approximately 64,000 individual maps to completely cover the entire  body, including partial overlap between maps that is essential to  tie neighboring maps together.   The details of this particular shape model and reference is:   Park et al., High-resolution shape model of Ceres from  stereophotoclinometry using Dawn Imaging Data, accepted  for publication, Icarus, 2018.   Data  :  The models were originally prepared in the Implicitly Connected  Quadrilateral (ICQ) format, and files are provided in the DATA/ICQ  directory. The filenames are of the form CERES_xxxyymmdd_qqqq.ICQ,  where 'TTTTT' is the applicable body (VESTA or CERES), 'xxx' is the  origin of the shape model (nominally SPC, Stereo-photoclinometry),  'yy' is the creation year, 'mm' is the creation month,  'dd' is the creation day, and 'qqqq' is the resolution of the model.   A text file, 'ICQMODEL.ASC' is provided in the DOCUMENT directory which  describes the ICQ format.   The DATA directory also contains two additional files:  CERES_xxxyymmdd_PATCH.TAB - lists the locations  (latitude, longitude) where no camera data were usable in generation of the shape model at that location (e.g. the surface was in shadow or no  images where taken). In these locations, the  shape was patched with the Ceres reference  ellipsoid : [482.0, 482.0, 446.0] km.  FC2_IMAGES_USED.TAB - This file lists all the Framing Camera 2 (FC2) images used in the development of  the Dawn Ceres SPC shape models.  It is recommended that you use the following SPICE kernels when  using this product:   dawn_v14.tf (or later) : Ceres Surface name/ID mappings  dawn_ceres_grv171219_v1.tpc : Ceres rotation parameters  de432.bsp : Planetary ephemeris  sb_ceres_grv_171219.bsp : Ceres ephemeris wrt Sun  dawn_grv_150204_150424_171219_v1.bsp : Dawn ephemeris wrt Ceres  dawn_grv_150424_150701_171219_v1.bsp : Dawn ephemeris wrt Ceres  dawn_grv_150813_151023_171219_v1.bsp : Dawn ephemeris wrt Ceres  dawn_grv_151213_160902_171219_v1.bsp : Dawn ephemeris wrt Ceres  dawn_fc2_150818_160827_grv171219_v1.bc : Dawn FC2 orientation   The GEOMETRY directory contains a meta-kernel of these recommended  kernels. The 'SPICE_OMNIBUS_MM_SIS.PDF' document is provided in the  DOCUMENT directory which describes the SPICE system, where to get  the toolkit, and basic use.   The coordinate system of the model is described by the SPICE PC  Kernel entitled 'DAWN_CERES_GRV171219_V1.TPC', available on the Navigation and Ancillary Information Facility (NAIF) Dawn archive.  The pole is derived from Gravity Science observations [PARKETAL2016].   The volume archive Software Interface Specification (SIS) document  describes the format and content of the archive. HTML and PDF versions  of the document are provided in the DOCUMENT directory with the name  'DAWN_SPC_SHAPE_MODEL_SIS'.   Data Coverage and Quality  :  This volume contains the shape models derived by the Dawn Gravity  Science Team at JPL using the SPC image processing technique as  described above. The models are provided in 128, 258, 512, and  1024 resolutions in the DATA/ICQ directory.   The complete list of images used is in the DATA directory  with the filename FC2_IMAGES_USED.TAB. It has a corresponding  PDS3 Label entitled FC2_IMAGES_USED.LBL.   Although nearly all clear-filter images from the Ceres encounter  were used, certain images which have non-opnav exposures (e.g.  very long star stares) or were nearly black on the limb were  excluded and not usable for shape model generation.   A summary of Framing camera (FC2) images used to derive this  model are shown below.   ----------------------------------------------  Phase Coverage date start Number  Coverage date end of Images  ----------------------------------------------  SET 1  ----------------------------------------------   RC1 2015-FEB-12 11:54:40 UTC 40  2015-FEB-12 21:42:09 UTC   RC2 2015-FEB-19 14:55:09 UTC 36  2015-FEB-19 23:47:56 UTC   Opnav4 2015-FEB-25 19:07:38 UTC 20  2015-FEB-25 21:04:42 UTC   Opnav5 2015-MAR-02 00:32:58 UTC 20  2015-MAR-02 02:30:04 UTC   Opnav6 2015-APR-10 08:06:48 UTC 20  2015-APR-10 10:03:49 UTC   Opnav7 2015-APR-15 06:52:20 UTC 20  2015-APR-15 08:49:22 UTC   HPS 2015 APR 25 07:10:01 UTC 251  2015 APR 27 03:50:22 UTC   HPN 2015 APR 29 06:20:02 UTC 389  2015 MAY 01 22:00:07 UTC   RC3N 2015 MAY 04 03:10:02 UTC 51  2015 MAY 04 13:35:04 UTC   RC3E 2015 MAY 05 19:50:02 UTC 51  2015 MAY 06 06:15:06 UTC   RC3S 2015 MAY 07 12:20:03 UTC 51  2015 MAY 07 22:45:08 UTC   Opnav8 2015-MAY-16 17:05:40 UTC 40  2015-MAY-16 19:02:40 UTC   Opnav9 2015-MAY-22 21:46:18 UTC 40  2015-MAY-22 23:43:18 UTC   SET 2  ----------------------------------------------   SurveyC1 2015-JUN-05 15:29:33 UTC 150  2015-JUN-07 05:17:33 UTC   SurveyC2 2015-JUN-08 18:22:58 UTC 118  2015-JUN-10 07:23:59 UTC   SurveyC3 2015-JUN-11 21:22:23 UTC 114  2015-JUN-13 11:02:24 UTC   SurveyC4 2015-JUN-15 00:08:51 UTC 142  2015-JUN-16 13:36:51 UTC   SurveyC5 2015-JUN-18 03:15:17 UTC 109  2015-JUN-19 16:15:17 UTC   SurveyC6 2015-JUN-21 06:06:43 UTC 112  2015-JUN-22 19:06:43 UTC   SurveyC7 2015-JUN-24 08:07:43 UTC 118  2015-JUN-25 23:02:44 UTC   SET 3  ----------------------------------------------   HAMO C1 001 18-AUG-2015 04:53:42 UTC 60  19-AUG-2015 09:13:03 UTC   HAMO C1 003 19-AUG-2015 18:42:31 UTC 60  20-AUG-2015 23:02:02 UTC   HAMO C1 005 21-AUG-2015 08:31:14 UTC 70  22-AUG-2015 12:50:23 UTC   HAMO C1 007 22-AUG-2015 22:29:25 UTC 40  23-AUG-2015 07:44:29 UTC   HAMO C1 008 23-AUG-2015 17:13:43 UTC 41  24-AUG-2015 02:38:48 UTC   HAMO C1 009 24-AUG-2015 12:08:10 UTC 120  27-AUG-2015 06:15:54 UTC   HAMO C2 001 29-AUG-2015 07:00:45 UTC 32  29-AUG-2015 16:00:46 UTC   HAMO C2 002 31-AUG-2015 15:42:34 UTC 32  01-SEP-2015 00:42:34 UTC   HAMO C2 003 03-SEP-2015 19:18:24 UTC 32  04-SEP-2015 04:18:23 UTC   HAMO C2 004 30-AUG-2015 02:14:46 UTC 156  07-SEP-2015 07:13:45 UTC   HAMO C2 005 30-AUG-2015 01:54:46 UTC 178  07-SEP-2015 07:53:45 UTC   HAMO C3 001 09-SEP-2015 07:12:16 UTC 34  09-SEP-2015 16:42:16 UTC   HAMO C3 002 14-SEP-2015 19:27:22 UTC 34  15-SEP-2015 04:57:22 UTC   HAMO C3 003 15-SEP-2015 14:20:49 UTC 136  18-SEP-2015 08:31:32 UTC   HAMO C4 001 20-SEP-2015 05:12:48 UTC 33  20-SEP-2015 14:27:48 UTC   HAMO C4 002 20-SEP-2015 08:30:18 UTC 18  21-SEP-2015 00:45:39 UTC   HAMO C4 003 22-SEP-2015 00:53:35 UTC 50  24-SEP-2015 12:52:18 UTC   HAMO C4 004 21-SEP-2015 22:16:05 UTC 49  26-SEP-2015 02:37:59 UTC   HAMO C4 005 21 SEP 2015 00:45:39 UTC 439  29-SEP-2015 06:09:44 UTC   HAMO C5 001 01-OCT-2015 06:40:17 UTC 116  04-OCT-2015 00:28:42 UTC   HAMO C5 002 04-OCT-2015 10:11:19 UTC 58  05-OCT-2015 14:14:04 UTC   HAMO C5 003 05-OCT-2015 23:56:49 UTC 29  06-OCT-2015 09:06:55 UTC   HAMO C5 004 06-OCT-2015 18:49:40 UTC 58  07-OCT-2015 22:52:40 UTC   HAMO C5 005 08-OCT-2015 08:35:21 UTC 87  10-OCT-2015 07:30:51 UTC   HAMO C6 001 12-OCT-2015 08:40:19 UTC 36  13-OCT-2015 03:52:58 UTC   HAMO C6 002 13-OCT-2015 11:02:58 UTC 30  15-OCT-2015 20:40:35 UTC   HAMO C6 003 14-OCT-2015 23:28:01 UTC 35  18-OCT-2015 06:18:36 UTC   HAMO C6 004 13-OCT-2015 03:52:58 UTC 310  21-OCT-2015 09:48:54 UTC   SET 4  ----------------------------------------------   LAMO C0 001 16-DEC-2015 09:27:00 UTC 365  17-DEC-2015 20:30:04 UTC   LAMO C1 001 18-DEC-2015 21:17:28 UTC 321  21-DEC-2015 11:24:20 UTC   LAMO C1 002 18-DEC-2015 21:14:28 UTC 426  21-DEC-2015 12:17:41 UTC   LAMO C1 003 18-DEC-2015 22:59:09 UTC 821  26-DEC-2015 16:56:50 UTC   LAMO C1 004 28-DEC-2015 00:00:18 UTC 777  30-DEC-2015 15:00:41 UTC   LAMO C1 005 01-JAN-2016 13:21:24 UTC 743  04-JAN-2016 19:39:20 UTC   LAMO C1 006 01-JAN-2016 14:42:44 UTC 825  08-JAN-2016 17:48:13 UTC   LAMO C2 001 10-JAN-2016 21:01:56 UTC 792  14-JAN-2016 03:16:36 UTC   LAMO C2 002 15-JAN-2016 10:24:15 UTC 796  18-JAN-2016 16:35:41 UTC   LAMO C2 003 19-JAN-2016 23:41:25 UTC 631  22-JAN-2016 14:37:49 UTC   LAMO C2 004 24-JAN-2016 12:55:07 UTC 773  27-JAN-2016 03:52:22 UTC   LAMO C2 005 29-JAN-2016 02:11:49 UTC 780  31-JAN-2016 17:12:31 UTC   LAMO C3 001 02-FEB-2016 21:11:17 UTC 720  06-FEB-2016 03:19:57 UTC   LAMO C3 002 07-FEB-2016 10:33:00 UTC 722  10-FEB-2016 16:36:52 UTC   LAMO C3 003 11-FEB-2016 23:49:42 UTC 708  14-FEB-2016 14:29:14 UTC   LAMO C3 004 16-FEB-2016 13:05:31 UTC 732  19-FEB-2016 03:46:56 UTC   LAMO C3 005 21-FEB-2016 02:25:30 UTC 529  23-FEB-2016 00:44:11 UTC   LAMO C4 001 26-FEB-2016 02:43:26 UTC 353  28-FEB-2016 11:56:41 UTC   LAMO C4 002 02-MAR-2016 08:23:56 UTC 354  04-MAR-2016 01:11:39 UTC   LAMO C4 003 05-MAR-2016 23:46:59 UTC 206  08-MAR-2016 14:26:51 UTC   LAMO C4 004 10-MAR-2016 13:04:16 UTC 348  13-MAR-2016 03:47:38 UTC   LAMO C4 005 15-MAR-2016 02:27:18 UTC 354  17-MAR-2016 17:11:21 UTC   LAMO C5 001 20-MAR-2016 08:35:22 UTC 306  23-MAR-2016 04:20:49 UTC   LAMO C5 002 25-MAR-2016 14:18:22 UTC 149  27-MAR-2016 01:16:10 UTC   LAMO C5 003 29-MAR-2016 00:19:07 UTC 255  31-MAR-2016 14:38:49 UTC   LAMO_C05_04 03-APR-2016 00:38:55 UTC 204  04-APR-2016 11:37:48 UTC   LAMO_C05_05 07-APR-2016 13:59:39 UTC 187  09-APR-2016 17:20:24 UTC   LAMO_C06_01 11-APR-2016 21:27:55 UTC 548  14-APR-2016 00:58:22 UTC   LAMO_C06_02 16-APR-2016 11:03:35 UTC 578  19-APR-2016 05:23:03 UTC   LAMO_C06_03 20-APR-2016 23:52:54 UTC 562  23-APR-2016 03:25:33 UTC   LAMO_C06_04 25-APR-2016 13:11:53 UTC 561  28-APR-2016 13:12:55 UTC   LAMO_C06_05 30-APR-2016 02:34:08 UTC 495  02-MAY-2016 00:40:13 UTC   LAMO_C07_01 05-MAY-2016 08:32:23 UTC 540  07-MAY-2016 12:00:56 UTC   LAMO_C07_02 09-MAY-2016 21:47:49 UTC 563  12-MAY-2016 11:31:34 UTC   LAMO_C07_03 14-MAY-2016 11:08:01 UTC 540  16-MAY-2016 14:40:01 UTC   LAMO_C07_04 19-MAY-2016 00:29:55 UTC 540  21-MAY-2016 04:00:16 UTC   LAMO_C07_05 23-MAY-2016 08:19:29 UTC 485  25-MAY-2016 06:20:25 UTC   LAMO_C08_01 27-MAY-2016 21:28:41 UTC 695  30-MAY-2016 22:09:00 UTC   LAMO_C08_02 01-JUN-2016 10:47:17 UTC 727  04-JUN-2016 06:46:51 UTC   LAMO_C08_03 06-JUN-2016 00:10:44 UTC 684  08-JUN-2016 14:42:07 UTC   LAMO_C08_04 10-JUN-2016 13:32:01 UTC 670  13-JUN-2016 08:39:00 UTC   LAMO_C08_05 14-JUN-2016 21:19:50 UTC 751  17-JUN-2016 17:14:00 UTC   LAMO_C09_01 19-JUN-2016 21:19:07 UTC 796  22-JUN-2016 22:58:17 UTC   LAMO_C09_02 24-JUN-2016 10:36:32 UTC 786  27-JUN-2016 12:18:45 UTC   LAMO_C09_03 28-JUN-2016 23:58:03 UTC 715  01-JUL-2016 20:11:55 UTC   LAMO_C09_04 03-JUL-2016 07:50:02 UTC 794  06-JUL-2016 09:29:01 UTC   LAMO_C09_05 07-JUL-2016 21:05:57 UTC 777  11-JUL-2016 03:26:14 UTC   LAMO_C10_01 16-JUL-2016 18:03:20 UTC 223  17-JUL-2016 13:05:22 UTC   LAMO_C10_02 18-JUL-2016 08:07:59 UTC 782  21-JUL-2016 10:00:08 UTC   LAMO_C10_03 22-JUL-2016 21:27:00 UTC 668  25-JUL-2016 12:22:13 UTC   LAMO_C10_04 26-JUL-2016 23:47:06 UTC 911  30-JUL-2016 12:29:51 UTC   LAMO_C10_05 01-AUG-2016 16:26:43 UTC 673  04-AUG-2016 07:07:09 UTC   LAMO_C10_06 05-AUG-2016 18:30:36 UTC 668  08-AUG-2016 09:23:38 UTC   LAMO_C11_01 10-AUG-2016 13:57:40 UTC 725  13-AUG-2016 15:52:32 UTC   LAMO_C11_02 15-AUG-2016 03:15:26 UTC 734  17-AUG-2016 23:40:21 UTC   LAMO_C11_03 19-AUG-2016 11:03:01 UTC 633  22-AUG-2016 06:35:03 UTC   LAMO_C11_04 24-AUG-2016 00:35:29 UTC 730  27-AUG-2016 01:38:41 UTC   ----------------------------------------------   References  :   GASKELL, R. W., BARNOUIN-JHA, O. S., SCHEERES, D. J., KONOPLIV, A. S.,  MUKAI, T. , ABE, S. , SAITO, J. , ISHIGURO, M. , KUBOTA, T. ,  HASHIMOTO, T. , KAWAGUCHI, J. , YOSHIKAWA, M. , SHIRAKAWA, K. ,  KOMINATO, T. , HIRATA, N. and DEMURA, H. (2008), Characterizing and  navigating small bodies with imaging data. Meteoritics  and Planetary Science, 43: 1049-1061.  doi:10.1111/j.1945-5100.2008.tb00692.x [GASKELLETAL2008]   Gaskell, R.W., O. Barnouin-Jha, and D. Scheeres, Modeling Eros  with Stereophotoclinometry, Abstract #1333, 38th LPSC,  Houston, TX, 2007. [GASKELLETAL2007]   Gaskell R.W., Landmark navigation and target characterization  in a simulated Itokawa encounter, AAS paper 05-289, AAS/AIAA  Astrodynamics Specialists Conf., Lake Tahoe, CA, 2005.  [GASKELL2005]   R. S. Park, A. S. Konopliv, B. G. Bills, N. Rambaux, J. C.  Castillo-Rogez, C. A. Raymond, A. T. Vaughan, A. I. Ermakov,  M. T. Zuber, R. R. Fu, M. J. Toplis, C. T. Russell, A. Nathues  and F. Preusker, A partially differentiated interior for (1) Ceres  deduced from its gravity field and shape, Nature 537, 515-517,  2016. [PARKETAL2016]

Confidence Level Overview  :  The shape models contained within this dataset are believed to  be of good quality. The user should make note of the following:   All archived HAMO and LAMO clear filter science images were used  in generation of the shape model. A full list of images used is  available in the DATA directory.   The average total height error of the final global topography  model is 10.2 m and 88.9 percent of the surface has the total height  error below 20 m.   In certain locations on the surface, no image data were usable  in generation of the shape model due to shadowing, unresolved  limb profile, or degraded image quality. In these locations, the  Ceres reference ellipsoid was used to patch the shape model.  A data product is provided in the DATA directory that describes the  locations of the ellipsoid patches.