Differences between revisions 20 and 21
 ⇤ ← Revision 20 as of 2015-06-03 00:07:53 → Size: 2401 Editor: EricPalmer Comment: ← Revision 21 as of 2016-01-25 09:44:53 → ⇥ Size: 2269 Editor: tcampb Comment: Deletions are marked like this. Additions are marked like this. Line 1: Line 1: ## page was renamed from geometry.e Line 3: Line 2: ===== (Compiled by TC) ===== Line 4: Line 4: 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. <
>= BACK UP YOUR WORK BEFORE RUNNING GEOMETRY =<
> Line 6: Line 8: === Input - files === * [[LMKFILES]] * [[IMAGEFILES]] == Description ==Makes a surface by solving for the spacecraft position, spacecraft pointing, and Landmark locations.== Requires == * [[LMKFILES]]/ * [[IMAGEFILES]]/ Line 12: Line 17: * [[MAPFILES]] * [[MAPFILES]]/ Line 15: Line 20: * [[SUMFILES]] * [[SUMFILES]]/ Line 17: Line 22: === Input - stdin === == Input stdin == Line 20: Line 25: . 2: camera pointing, scobj  . 3: RA/DEC/TWIST . 2: camera pointing, scobj Line 34: Line 38: change position and pointing aprioris? (y/n){{{    n}}} Line 49: Line 48: == Output == Line 50: Line 50: === Output === * [[SUMFILES]] * [[LMKFILES]] * [[MAPFILES]] * [[SUMFILES]]/ * [[LMKFILES]]/ * [[MAPFILES]]/ Line 78: Line 75: ----CategoryPrograms

BACK UP YOUR WORK BEFORE RUNNING GEOMETRY

Description

Makes a surface by solving for the spacecraft position, spacecraft pointing, and Landmark locations.

Requires

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

Input stdin

• 1: landmark vectors.
• 2: camera pointing, scobj
• 0: end.
• input operation list

`   120`
• enter number of iterations

`   3`
• use limbs for pointing? (y/n)

`   y`
• continue? (y/n)

`   n`

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)