Landing Support System
Precision Landing Beacon and Guidance System
The Precision Landing Beacon and Guidance System is a surface network of radio-frequency transponders, optical strobes, and terrain hazard uplinks that guides incoming spacecraft to touchdown zones within 5 meters of target coordinates. Operating across beacon ranges of at least 100 kilometers, the system coordinates terminal descent for crew and resupply modules over a 100-year operational lifetime. Lunar landings present severe physical hazards: because the Moon lacks an atmosphere, rocket plume exhaust ejects regolith at high velocities along unhindered ballistic trajectories, threatening the Ark with impact damage. Additionally, permanently shadowed landing zones disable optical sensors, necessitating radio-frequency guidance and real-time landing zone hazard maps updated at a minimum of 1 hertz.
Provides precision landing guidance beacons and terrain-relative navigation aids to enable future visiting spacecraft to land safely near the Ark.
Purpose
Guide resupply missions, crew vehicles, and future expansion modules to safe landing zones near the Ark with meter-level precision.
Context
Future missions will need to land close to the Ark for logistics; this system provides the RF and optical beacons, hazard maps, and real-time terrain data needed for precision approach and touchdown.
Principles
- ▸Cooperative landing using ground-based beacons augments onboard navigation
- ▸Hazard detection and avoidance requires up-to-date terrain data
- ▸Multi-modal guidance: RF ranging, optical beacon, terrain-relative navigation
- ▸Landing zone monitoring for debris and surface condition
Typical implementations
- ▸RF transponder beacons for range and bearing
- ▸Optical/IR strobes for terminal guidance
- ▸Real-time landing zone hazard map uplink
- ▸Landing pad retroreflectors for lidar-based approach
Lunar considerations
- ▸Rocket exhaust ejects regolith at high velocity (plume impingement hazard)
- ▸Landing zones must be sufficiently far from Ark to prevent damage
- ▸No atmosphere means ballistic debris trajectories
- ▸Shadowed landing zones require RF-only guidance
Specifications
Functional
| primary function | Provide precision guidance signals and hazard data to approaching spacecraft for safe landing near the Ark |
| inputs | approaching spacecraft telemetry, current landing zone terrain data |
| outputs | RF ranging/bearing signals, optical beacon signals, landing zone hazard maps |
| guidance accuracy m | <=5 |
| beacon range km | >=100 |
| hazard map update rate hz | >=1 |
Physical
| materials | ruggedized beacon housings, optical-grade reflectors |
| vacuum | True |
| dust | lunar regolith + plume ejecta |
Operational
| thermal range c | -173, 127 |
| lifetime years | 100 |
Interfaces
Provides
- RF and optical guidance for approaching spacecraft
Requires
- Precise beacon positions in lunar reference frame
- Current landing zone terrain and hazard maps
- Power for beacons during landing operations
Decomposes into
Cite this entry
Lunar Ark Codex. "Landing Support System" (L2-NAV-LAND). Retrieved 10 September 2026, from https://lunarark.com/entry/L2-NAV-LAND
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.