Differences between revisions 13 and 15 (spanning 2 versions)
 ⇤ ← Revision 13 as of 2015-05-15 11:02:43 → Size: 1861 Editor: KristoferDrozd Comment: ← Revision 15 as of 2015-05-18 10:45:06 → ⇥ Size: 2332 Editor: KristoferDrozd Comment: Deletions are marked like this. Additions are marked like this. Line 56: Line 56: == PowerPoint Notes== Line 65: Line 67: === More in Depth Description of Geometry === * Global solution for camera pointing and body-fixed maplet location. * Iterative process:  * Weighted least-squares solution of landmarks (control points) based on:   * Nominal camera pointing and position   * Relative landmark-to-landmark location  * Weighted least-squares solution of camera position and pointing based on landmark location{{attachment:geometry_outline.jpg}}

# geometry.e

Makes a surface by solving for the spacecraft position, spacecraft pointing, and Landmark locations. I think you need to run [residuals.e] right after you do this, but I am not sure.

### Input - files

• SHAPE.TXT - This is the shape model that is stored in directory SHAPEFILES.

### Input - stdin

• 1: landmark vectors.
• 2: camera pointing, scobj
• 3: RA/DEC/TWIST
• 0: end.
• input operation list

`   120`
• enter number of iterations

`   3`
• change position and pointing aprioris? (y/n)

`   n`
• use limbs for pointing? (y/n)

`   y`
• continue? (y/n)

`   n`

### Output

== PowerPoint Notes==

### Geometry Estimation Terms

• Spacecraft State - Position and orientation of spacecraft affects size and location of the body in an image. Errors are reflected by offsets of extracted image data from maplets for all maplets in the image.
• Control Point Location - An error in the body-fixed control point location is reflected by offsets of extracted image data for all images containing the maplets.
• Rotation - An error in the transformation from inertial to body fixed frames is reflected in time-dependent offsets in extracted image data for all maplets in all images.
• Differential Stereo - Errors in the maplet heights relative to the center are reflected by differential shifts of features within the extracted image data in addition to displacements from the maplets themselves.

### More in Depth Description of Geometry

• Global solution for camera pointing and body-fixed maplet location.
• Iterative process:
• Weighted least-squares solution of landmarks (control points) based on:
• Nominal camera pointing and position
• Relative landmark-to-landmark location
• Weighted least-squares solution of camera position and pointing based on landmark location

geometry (last edited 2020-02-19 11:13:45 by JohnWeirich)