Bidirectional Inter-Satellite Ranging
Author: Tianjiang Shuo
Website: https://cislunarspace.cn
Definition
A technique where two spacecraft simultaneously transmit ranging signals to each other and receive each other's reply signals, eliminating clock biases inherent in one-way ranging through bidirectional signal propagation time measurement to achieve high-precision relative distance measurement. The paper notes that using bidirectional inter-satellite ranging data between cislunar spacecraft, combined with relativistic corrections, enables autonomous orbit determination at libration points with accuracy superior to ground-based methods under 1 mm ranging error conditions. This technique is a key means for autonomous cislunar spacecraft orbit determination.
Application Value
The Bidirectional Inter-Satellite Ranging plays a significant role in cislunar space mission design, analysis, and control. In orbital design, it can be leveraged for transfer trajectory optimization; in navigation and control, it improves mission execution precision and reliability; in system analysis, it facilitates deeper understanding of complex multi-body dynamical behavior, guiding mission planning and risk assessment.
Related Concepts
- High-Orbit GNSS Side Lobe Reception
- Orbital Rendezvous
- Maneuver Classification
- Identifiability Degree
References
- 丛佃伟 等 - 2025 - 地月空间航天器自主导航技术及研究进展