LEOGeolocation | 低轨卫星高精度快速定位与大动态多普勒测距系统

LEOGeolocation 基于低轨 (LEO) 巨型星座实现高精度定位，利用陡峭的多普勒频移曲线与机会信号，提供强抗干扰的空间位置解算。

LEOGeolocation Rapid Doppler Curve Fitting Pipeline

Instantaneous user position triangulation derived from LEO orbital pass geometry

Central System: Low Earth Orbit Constellation - 550 km altitude, 7.5 km/s orbital velocity

Network Nodes

Low Earth Orbit Constellation
Direct RF SDR Front-End
Non-Linear Doppler Curve Solver
Authenticated 3D Coordinate

Architectural Protocol Layers

Spaceborne PHY/MAC Layer (3GPP Rel-17 TS 38.300): Doppler compensation, HARQ disabling, and timing advance extension.
Orbital Mesh Routing (CCSDS / Delay-Tolerant Networking): Dynamic topology routing over intermittent laser crosslinks.
Regenerative Core Processing (OpenRAN / 3GPP CU-DU Split): Onboard user plane function (UPF) local breakout.

Key Metrics: < 18ms (LEO Orbit-to-Ground Roundtrip) | 100 Gbps (Optical Crosslink Throughput) | ±48 kHz (Doppler Shift Compensation) | 99.999% (Orbital Constellation Availability)

低轨 (LEO) 卫星地理定位、高精度多普勒测距与巨型星座 PNT

Core Engineering Areas

Doppler Rate-of-Change Solver (df/dt) — Exploiting high LEO angular velocities where frequency shift rates exceed 40 Hz/s, creating sharp mathematical position intersection curves.
Signals of Opportunity (SOP) Tracking — Deriving sub-meter positioning from commercial broadband satellite downlinks without requiring dedicated navigation payloads.
Tropospheric Delay Compensation — Real-time atmospheric modeling compensating for slant path wet and dry delay variations as satellites sweep from horizon to horizon.

Technical Articles

Related Cluster Architecture Specifications

NonTerrestrialNetwork — 3GPP 5G/6G NTN Satellite Architecture, Direct-to-Cell & Non-Terrestrial Infrastructure
NonTerrestrialNetworks — Multi-Orbit Heterogeneous Constellation Interworking (LEO / MEO / GEO / HAPS)
AirspaceSync — Doppler Compensation, Relativistic Timing & Airspace-Space Synchronization
FSOComm — Free Space Optics, High-Bandwidth Space Laser Communications & Atmospheric Mitigation