Navigation Update Interval

Author: Tianjiang Shuo

Website: https://cislunarspace.cn

Definition

The time interval between two navigation measurements. In cislunar continuous-thrust station-keeping, the navigation system cannot provide real-time state information; a typical interval is two days. The navigation update interval directly affects the error accumulation of the linearized dynamical model: longer intervals produce larger model errors. For near rectilinear halo orbits, shortening the interval (e.g., from two days to six hours) significantly improves the success rate, indicating that linearization model error is a key factor causing station-keeping failures for the 9:2 NRHO.

Application Value

This term has significant application value in cislunar space missions。In the orbital design phase, engineers use relevant theories for trajectory optimization；In navigation and orbit determination, it is used to improve measurement accuracy；In attitude control and orbit maintenance tasks, it ensures stable spacecraft operation。In practical applications, parameter optimization and algorithm adaptation can be combined with mission requirements to improve mission success rate and resource utilization efficiency。

  • Characteristic Exponents
  • Capture Docking Phase
  • Lunar Flyby Transfer

References

  • Zhang and Wang 2022 Continuous-thrust station-keeping of cis-lunar orbits using optimal sliding mode control with practical constraints
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Contributors: ouyangjiahong, Ou Yang Jiahong