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Question #5359

Real resolution in shape model of kernels

Added by Juan Rizos 8 months ago. Updated 8 months ago.

Status:
In Progress
Priority:
Normal
Assignee:
-
Category:
Applications
Target version:
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Description

Hi, I am using phocube tool in images from Ceres (Dawn Mission). Attached images are Oxo crater and emission values of each pixel. I have the same pixel resolution (1024 x 1024) but it is easy to see that the real resolution of shape model is much lower than optical image. How can I get information about the real value of my shape model?

I don't have a separate shape model of Ceres, I am using kernels from https://isis.astrogeology.usgs.gov/ and I simply apply phocube .... localemission=yes.

Thank you!

image.16VFGZ.png View - optical image (254 KB) Juan Rizos, 2018-03-22 10:17 AM

image.P20MGZ.png View - shape model emission angles image (122 KB) Juan Rizos, 2018-03-22 10:17 AM

History

#1 Updated by Tammy Becker 8 months ago

  • Status changed from New to Acknowledged

#2 Updated by Tammy Becker 8 months ago

For Ceres, ISIS3 defaults to the shape model (DEM) located in
$ISIS3DATA/base/dems/Ceres_Dawn_FC_HAMO_DTM_DLR_Global_60ppd_Oct2016_prep.cub

This shape model can be displayed in qview as an image.

The mapping group resolution keywords for this DEM state:
PixelResolution = 136.71745810 meters/pixel
Scale = 60.0000 pixel/degree

More information about this shape model can be found:
https://astrogeology.usgs.gov/search/map/Ceres/Dawn/DLR/FramingCamera/Ceres_Dawn_FC_HAMO_DTM_DLR_Global_60ppd_Oct2016

The pixel resolution of your image data can be computed with phocube parameter pixelresolution=true, of course, qview will report the resolution of the pixel with your cursor. Other applications such as campt and camstats will also report your the resolution.

Hope this helps!

#3 Updated by Tammy Becker 8 months ago

  • Status changed from Acknowledged to In Progress

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