Post on 22-Dec-2015
Cornell SHOT-II Post-Flight DebriefingSHOT-IISunday, June 18, 2006
Adam MaherJohn Honchariw
Mechanical Systems EngineerCUSat Satellite Project
Nanosat-4 Program Sponsors
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Presentation Guide
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
Release
Initial Photo, 10 minutes
Photos @ 3.5 min
Balloon BurstAll Pictures Taken Enter Stand-
by Mode
Landing & Data Retrieval
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Presentation Guide
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:
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Presentation Guide
Expected Results(2 of 3)
Computed distance: 42.526 inches
Expected Results Raw Image Data Software Reconstruction 3-D CAD Model
Actual Results
Conclusions
Actions
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Presentation Guide
Expected Results(3 of 3)
Expected Results Raw Image Data Software Reconstruction 3-D CAD Model
Actual Results
Conclusions
Actions
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Presentation Guide
Results: Image Data(1 of 4)
Expected Results
Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements
Conclusions
Actions
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Presentation Guide
Results(2 of 4)
Expected Results
Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements
Conclusions
Actions
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Presentation Guide
Results(3 of 4)
Expected Results
Actual Results Raw Image Data Choose Vertices Software Reconstruction Measurements
Conclusions
Actions
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Presentation Guide
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 113.482 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
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Presentation Guide
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
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Presentation Guide
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
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Presentation Guide
Questions
Expected Results
Actual Results
Conclusions
Actions