Cornell SHOT-II Post-Flight Debriefing SHOT-II Sunday, June 18, 2006 Adam Maher John Honchariw Mechanical Systems Engineer CUSat Satellite Project Nanosat-4 Program Sponsors

SHOT-II 6/18/06 Presentation Guide 2 Mission Overview  CUSat High Altitude Test (CHAT) Takes 25 pictures of adjacent SHOT-II Package Use Photomodeler-5 software package  Distance verification  Accelerometer data asses versatility of algorithm Mission Overview Mission Relevance CHAT Design CHAT Testing Expected Results Demonstration

SHOT-II 6/18/06 Presentation Guide 3 Expected Results (1 of 3) Expected Results Raw Image Data Software Reconstruction 3-D CAD Model Actual Results Conclusions Actions  Distance verification photo: Camera placed 43 inches away  3D model photos:

SHOT-II 6/18/06 Presentation Guide 4 Expected Results (2 of 3)  Computed distance: inches Expected Results Raw Image Data Software Reconstruction 3-D CAD Model Actual Results Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 5 Expected Results (3 of 3) Expected Results Raw Image Data Software Reconstruction 3-D CAD Model Actual Results Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 6 Results: Image Data (1 of 4) Expected Results Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 7 Results (2 of 4) Expected Results Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 8 Results (3 of 4) Expected Results Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 9 Results (4 of 4)  Both images contained same information Less data on z-axis, which means more error in solution  Truth Data String 107 inches placement  Computed Value inches  Error Cable elasticity +/- 5 inches  Also may be temperature dependent Lens focal point +/- 1 inch 2D error +/- 1 inch  Accelerometer Data was not gathered correctly Expected Results Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 10 Conclusions  Data provides centimeter-level accuracy Inconclusive on sub-centimeter level Need to test with fewer variables involved  Software & ground operations “Dress Rehearsal” Full crew in Ithaca for analysis Greater familiarity with software  Camera focal point Important variable to measure Improves measurement accuracy  Characterization of ‘Good Image’ See three axes of information  2D creates greater measurement error Relative movement not as much of an issue Expected Results Actual Results Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 11 Actions  Camera focal point Need to know this information with respect to the body frame Important variable in achieving sub- centimeter level accuracy  Measurement accuracy must be retested Greater control in the experiment Take pictures that have 3 axes with of information Expected Results Actual Results Conclusions Actions

SHOT-II 6/18/06 Presentation Guide 12 Questions Expected Results Actual Results Conclusions Actions