Path: SpacecraftEstimation/StellarAttDet
% STARIDPYRAMID Identifies the best star matches using triads.
One or more measurements may be bad. This routine requires at least three
measurements. Assumes a pinhole transformation with Pix2U; you must set the
pixel scale factor in the options for successful star identification.
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Form:
options = StarIDPyramid
[starID, uMeas, uCatalog] = StarIDPyramid( starMeas, d, options )
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Inputs
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starMeas (.) Star measurement data structure
.pixelLocation (2,m) vectors of [xloc,yloc]
.pixelIntensity (1,m) Intensity
d (.) Catalog data structure
.starMatrix (4,p) Star catalog of p stars stored as [intensity;u]
.fieldOfView (1,1) Field of view
.nearMatrix (3,:) [dot;star1;star2]
options (.) Options
.angleTolerance (1,1) Tolerance on star angles
.pixelMapScale (2 or 1,1) Pixel map scale factor
(focal length in pixels)
.nMeasMax (1,1) Max number of measurements
.verbosity (1) Verbosity level
.stars (:) A set of a priori star indices
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Outputs
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starID (m) Catalog id's of measured stars
uMeas (3,:) Measured unit vectors
uCatalog (3,:) Corresponding catalog vectors
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Reference: Mortari, The Pyramid Star Identification Technique
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SpacecraftEstimation: StellarAttDet/SearchKVector SpacecraftEstimation: StellarEphem/Pix2U Math: Linear/Unit
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