Ceres Dawn FC HAMO Hillshade 60ppd Oct. 2016
- Primary Authors
- German Aerospace Center (DLR)
- Originators
- USGS Astrogeology Science Center
- Publisher
- USGS Astrogeology Science Center
- Publication Date
- 2016-10-17
- Abstract
- This is a grayscale hillshade of the original Ceres digital terrain model (DTM). This DTM was created from the Dawn High Altitude Mapping orbit (HAMO) Framing Camera 2 (FC2) images and derived by using the stereo photogrammetry (SPG) method. The HAMO DTM covers approximately 98% of Ceres surface (few permanently shadowed areas near the poles required interpolation). The a DTM has a lateral spacing of ~136.7 m/pixel (60 pixel/degree) and a vertical accuracy of about 10 m. A global DTM is provided in an equidistant cylindrical projection and hemispheric DTMs are provided for both polar regions as stereographic projections. References: Preusker,F.,Scholten,F.,Matz,K.-D.,Elgner,S.,Jaumann,R.,Roatsch,T., Joy,S.P.,Polanskey,C.A.,Raymond,C.A.,Russell,C.T.,2016.Dawn at Ceres - Shape model and rotational state, 47th Lunar and Planetary Science Conference (LPSC) - USRA-Houston, 2016 , Abstract 1954. http://www.hou.usra.edu/meetings/lpsc2016/pdf/1954.pdf Roatsch,T., E. Kersten,K.-D. Matz,F. Preusker, F. Scholten, R. Jaumann,C.A. Raymond, C.T.Russell, High-resolution Ceres High Altitude Mapping Orbit Atlas derived from Dawn Framing Camera images, Planetary and Space Sciences, in press, 2016. Preusker, F., J. Oberst, J. Head, T. Watters, M. Robinson, M. Zuber, S. Solomon, Stereo topographic models of Mercury after three MESSENGER flybys. Planet. Space Sci. (2011). DOI:10.1016/j.pss.2011.07.005 Raymond, C.A., R. Jaumann, A. Nathues, H. Sierks, T. Roatsch, F. Preusker, F. Scholten, R.W. Gaskell, L. Jorda, H.-U. Keller, M.T. Zuber, D.E. Smith, N. Mastrodemos, and S. Mottola, The Dawn topography investigation. Space Sci. Rev. 163, 487 (2011). DOI: 10.1007/s11214-011-9863-z Polanskey, C., S. Joy, and C. Raymond, "Dawn Ceres Mission: Science Operations Performance", SpaceOps 2016 Conference, SpaceOps Conferences, (in press).
- Purpose
- Dawn mission is equipped with two identical framing cameras (FC1 & FC2) which have one clear filter and seven band pass filters. At Ceres, only the FC2 was used to acquire science images while the FC1 was held in reserve. Clear filter images which were taken during HAMO were used to produce a global DTM of the illuminated part of Ceres [Preusker 2016]. Dawn orbited Ceres during in 6 cycles between August 16 and October 23, 2015 at the HAMO altitude of ~1475 km. A cycle is a single complete mapping of surface at a fixed attitude (nadir or off-nadir). The framing camera acquired about 2350 clear filter images [Preusker 2016] during the HAMO phase. The images were taken with different viewing angles and similar illumination conditions by slewing the spacecraft to various off-nadir attitudes.
Contact and Distribution
- Format
- Digital Elevation Model, Grey Scale, Remote-sensing Data, Shaded-Relief Map
- Access Constraints
- None
- Access Scope
- Use Constraints
- None
- Series Id
- DWNCHSPG_2
- Edition
- 1.0
- Edition Name
- DAWN-A-FC2-5-CERESHAMODTMSPG-V1.0
- Supplemental Information
- http://sbn.psi.edu/pds/resource/dwncfc2.html
- Native Data Set Environment
- GDAL, ISIS v3
- Astrogeology Theme
- Asteroids, Topography
- Mission Names
- Dawn
- Online Package Link
- https://astrogeology.usgs.gov/search/map/ceres_dawn_fc_hamo_hillshade_60ppd_137mp_oct_2016
- External File Size
- 233346027
- Online File Link
- http://astropedia.astrogeology.usgs.gov/download/Ceres/Dawn/DLR/FramingCamera/Ceres_Dawn_FC_HAMO_Shade_DLR_Global_60ppd_Oct2016.cub
- Contact Address
- 2255 N. Gemini Drive
- Contact City
- Flagstaff
- Contact State
- AZ
- Contact Postal Code
- 86001
- Contact Email
- astroweb@usgs.gov
Data Status and Quality
- Time Period of Content (start)
- 2014-12-26
- Time Period of Content (stop)
- 2016-04-21
- Currentness Reference
- Ground condition
- Progress
- In Work
- Update Frequency
- As needed
- Logical Consistency
- Some shadows were interpolated to fill in the original DTM
- Completeness Report
- This is a preliminary product
- Process Description
- All processing was completed using Geospatial Data Abstraction Library (GDAL) tools on the original LROC DEM. To derive this colorized shaded-relief this GDAL commands was used: (1) gdaldem hillshade input_dem output_hillshade -z 2 (ZFactor) -az 315 (Azimuth) -alt 45 (Altitude) Pixels do not contain any of the original explicit elevation information.
Lineage
- Process Date
- 2016-08-16
- Source Title
- Dawn at Ceres - Framing Camera
- Source Online Linkage
- http://sbn.psi.edu/pds/resource/dwncfc2.html
- Source PDS Archive
- Dawn
- Vertical Positional Accuracy Report
- Best Effort
Geospatial Information
- Target
- Ceres
- System
- Small Bodies
- Minimum Latitude
- -90
- Maximum Latitude
- 90
- Minimum Longitude
- 0
- Maximum Longitude
- 360
- Direct Spatial Reference Method
- Raster
- Object Type
- Grid Cell
- Raster Row Count (lines)
- 10800
- Raster Column Count (samples)
- 21600
- Bit Type (8, 16, 32)
- 8
- Quad Name
- Radius A
- 470000
- Radius C
- 470000
- Bands
- 1
- Pixel Resolution (meters/pixel)
- 136.7174581
- Scale (pixels/degree)
- 60
- Map Projection Name
- Equirectangular
- Latitude Type
- Planetocentric
- Longitude Direction
- Positive East
- Longitude Domain
- 0 to 360
