Docking Alignment System
Visual and Mechanical Alignment Guide System
The docking alignment system is a visual and mechanical guidance assembly that directs approaching spacecraft modules into position for soft-capture. Integrating LIDAR rangefinders, LED fiducial targets, and V-guide probes, the system tracks relative range and bearing while compliant mechanisms absorb residual misalignments up to ±10 cm and ±5 degrees. Operating on the Moon presents severe optical challenges, as extreme lighting variations between lunar day and night disrupt camera-based tracking during robotic berthing operations that lack human visual confirmation. Additionally, all optical markers, retroreflectors, and mechanical guides must maintain precise functional integrity after decades of dormancy on the lunar surface.
Alignment system guiding approaching modules for successful soft-capture
Purpose
Alignment system guiding approaching modules for successful soft-capture
Context
Child of L2-STR-DOCK
Principles
- ▸V-guide and probe alignment provides gross mechanical alignment during approach
- ▸LIDAR-based proximity sensing provides range and bearing for final approach
- ▸LED target pattern enables camera-based relative navigation
- ▸Compliant capture mechanism absorbs misalignment up to ±10cm, ±5 degrees
Typical implementations
- ▸ISS Trajectory and Control Sensor (TCS) for proximity operations
- ▸SpaceX Dragon LIDAR for ISS approach
- ▸NDS passive visual targets
Lunar considerations
- ▸Robotic berthing requires sensing and alignment without human visual confirmation
- ▸Lighting conditions vary between lunar day and night affecting optical systems
- ▸Alignment system must function after decades of dormancy
Specifications
Functional
| primary function | Alignment system guiding approaching modules for successful soft-capture |
Physical
| materials | Retroreflector targets, LED fiducial markers, LIDAR rangefinder |
Interfaces
Provides
- Alignment data for approach guidance
Requires
- Relative navigation data for module approach
Cite this entry
Lunar Ark Codex. "Docking Alignment System" (L3-STR-DOCK-GUIDE). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-STR-DOCK-GUIDE
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.