Radiation-resistant active pixel sensors (APS) for vision-based navigation in space missions.
Application in planetary navigation
- Vision-based cameras are the primary navigation sensor for precision planetary landing missions
- Detector choice significantly impacts device performance, development, and qualification
Project goals
- Evaluate the latest generation of APS detectors for navigation applications
- Optimize sensors for specific requirements of navigation cameras, differing from typical star tracker or payload applications
Areas of application
- Absolute navigation: matching visual landmarks to a reference map
- Relative navigation: tracking unknown landmarks to estimate displacement or velocity
- Hazard avoidance: identifying obstacles near the landing site and ensuring safe landing
Selection and testing process
- Evaluation of trade-offs between snapshot and rolling shutter
- Comparison of potential APS sensors for space suitability
- Selection of Teledyne e2v APS CMOS CIS120 (Capella) detector for radiation test campaign
Test results
- CIS120 detector successfully passed radiation tests
- Some degradation observed in total non-ionizing dose test
- New version of the component also tested and expected to yield even better results
This technology has the potential to significantly improve navigation systems in space missions, offering more radiation-resistant sensors for precision landing and other vision-based applications.
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