Terrain-Relative Navigation
E88916
Terrain-Relative Navigation is a guidance technology that enables spacecraft to autonomously analyze surface features in real time and adjust their descent path for a precise and safe landing.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
autonomous navigation system
→
guidance technology → spacecraft landing technology → |
| addresses |
terrain hazards such as rocks and slopes
→
uncertainty in spacecraft position relative to surface → |
| appliesTo |
Mars landers
→
crewed landing systems → lunar landers → planetary landers → uncrewed robotic landers → |
| comparedTo |
traditional inertial-only navigation
→
|
| enables |
autonomous hazard avoidance without ground control
→
landing in previously inaccessible regions → reduction of landing ellipse size → |
| goal |
enable targeted landings near scientifically interesting sites
→
maximize landing precision → maximize landing safety → |
| hasKeyFeature |
autonomous guidance updates
→
closed-loop navigation during descent → feature matching with onboard maps → hazard avoidance capability → high-precision landing accuracy → onboard image processing → real-time analysis of surface features → |
| improves |
landing accuracy compared to inertial-only navigation
→
landing safety in rough terrain → |
| isPartOf |
autonomous guidance, navigation, and control architectures
→
entry, descent, and landing systems → |
| operatesDuring |
powered descent phase
→
terminal descent phase → |
| reliesOn |
feature detection algorithms
→
image correlation techniques → inertial measurement data → onboard cameras → onboard computing → terrain maps → |
| requires |
prior terrain knowledge or maps
→
robust feature tracking under varying lighting conditions → sufficient onboard processing power → |
| usedFor |
autonomous landing of spacecraft
→
hazard detection during landing → precision landing on planetary surfaces → real-time descent path adjustment → safe landing in hazardous terrain → terrain-relative position estimation → |
Referenced by (1)
| Subject (surface form when different) | Predicate |
|---|---|
|
Perseverance rover
→
|
usesTechnology |