Data Set Information
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| DATA_SET_NAME |
SHAPE MODELS OF 67P/CHURYUMOV-GERASIMENKO V2.0
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| DATA_SET_ID |
RO-C-MULTI-5-67P-SHAPE-V2.0
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| NSSDC_DATA_SET_ID |
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| DATA_SET_TERSE_DESCRIPTION |
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| DATA_SET_DESCRIPTION |
Data Set Overview : This dataset contains a variety of shape models for comet 67P/Churyumov-Gerasimenko, the target of the Rosetta mission, together with a definition of the body-centered coordinate system for the nucleus. One source of shape models is the 3-D Modeling group of the OSIRIS science team. This group has produced two different models using stereophotoclinometry techniques, each of which has strengths and weaknesses for different regions of the nucleus (these are discussed in the user_guide.asc file in the document directory). Each model is presented in its highest-resolution form, with additional versions in degraded resolution (in steps roughly a factor of 2) for ease of use when the highest resolution is not needed. Additional information about the models and their production are given in the document directory. The version number of the dataset will be incremented as additional and/or updated shape models are added. A second source for shape models is the ESA Rosetta Mission Operations Centre (RMOC), which has provided a version of the shape model from NAVCAM images, also created using stereophotoclinometry techniques. The third source for shape model development is the German Aerospace Center (DLR), which has produced a shape model using the Stereo-PhotoGrammetric (SPG) techniques using OSIRIS images. The data are all tesselated triangular plate models provided in different formats, including a basic shape model with a WRL wrapper for ease of viewing, and a digital shape kernel (DSK) for use with SPICE software (toolkit 0066 and later). The ESA/RMOC model is also provided in other formats for use in 3D printers, etc. Concerning Citation of the Data : Each individual shape model data product and reference frame document contains its own unique citation. When citing these, please use the CITATION_DESC found in the PDS label file associated with it. A list of all CITATION_DESC can be found in the INDEX directory. Version History : Additional shape models and reference frames may be included at a later time. Please note that in each product label there is a NOTE stating in which version the product was last updated. In summary, below is what was included or changed with each version. A VERSION_HISTORY.TAB table is also provided in the DOCUMENT directory. V1.0 (initial version): - Plate SPC SHAP2, MSPCD SHAP2, and RMOC MTP009 shape models - DSK SPC SHAP2, MSPCD SHAP2, and RMOC MTP009 shape models - Cheops reference frame v1 V2.0 (this version): - Plate SPC SHAP5, SPG SHAP4S, and RMOC MTP019 shape models - DSK SPC SHAP5, SPG SHAP4S, and RMOC MTP019 shape models - update of user guide and organization documents - documents for new shape models + overall EAICD - version_history.tab included
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| DATA_SET_RELEASE_DATE |
2017-07-15T00:00:00.000Z
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| START_TIME |
1965-01-01T12:00:00.000Z
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| STOP_TIME |
N/A (ongoing)
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| MISSION_NAME |
INTERNATIONAL ROSETTA MISSION
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| MISSION_START_DATE |
1995-03-01T12:00:00.000Z
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| MISSION_STOP_DATE |
N/A (ongoing)
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| TARGET_NAME |
67P/CHURYUMOV-GERASIMENKO 1 (1969 R1)
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| TARGET_TYPE |
COMET
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| INSTRUMENT_HOST_ID |
RO
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| INSTRUMENT_NAME |
OSIRIS - WIDE ANGLE CAMERA
OSIRIS - NARROW ANGLE CAMERA
NAVIGATION CAMERA
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| INSTRUMENT_ID |
OSIWAC
OSINAC
NAVCAM
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| INSTRUMENT_TYPE |
FRAME CCD REFLECTING TELESCOPE
CCD CAMERA
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| NODE_NAME |
Small Bodies
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| ARCHIVE_STATUS |
LOCALLY ARCHIVED
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| CONFIDENCE_LEVEL_NOTE |
Confidence Level Overview : The Cheops reference frame was approved by a joint IAU/SBN peer review for use in describing the nucleus of comet 67P/Churyumov-Gerasimenko, and the document describing it is presented in the document directory of this dataset. The ESA RMOC model was used to define the Cheops reference frame. The other shape models have been aligned to this frame. There is a small discrepancy between the model derived from the NAVCAM images and the models derived from the OSIRIS images. If the large node of the nucleus is aligned in each case, then there is a slight, systematic offset (typically a few meters) between the orientations of the smaller node. (e.g., if images are blinked, it looks like there is a slight flexure at the neck.) It is not known why this discrepancy exists, or how much of an effect it has on the utilization of the models. 2016-03-22, T.Barnes & T.Farnham, NASA PDS Small Bodies Node.
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| CITATION_DESCRIPTION |
Barnes, T., T. Farnham, L. Jorda, M. Barthelemy, and D. Fraga (eds), SHAPE MODELS OF 67P/CHURYUMOV-GERASIMENKO V2.0, RO-C-MULTI-5-67P-SHAPE-V2.0, NASA Planetary Data System and ESA Planetary Science Archive, 2017.
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| ABSTRACT_TEXT |
This data set contains a collection of shape models and their associated reference frame for the Rosetta target 67P/Churyumov-Gerasimenko 1 (1969 R1). These were produced by Rosetta mission teams, based on OSIRIS and NAVCAM image data obtained at the comet. This is version 2.0 of this data collection. Since the last version, the SPG_LAM_PSI SHAP5, SPG_DLR SHAP4S, and SPC_ESA MTP019 shape models have been added to this collection.
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| PRODUCER_FULL_NAME |
Diego Fraga
Rafael Andres
Maud Barthelemy
ESA/RMOC
Laurent Jorda
Tony Farnham
Franck Scholten
Tilden Barnes
Nathaniel Bachman
Robert Gaskell
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| SEARCH/ACCESS DATA |
SBN Comet Website
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