Real‐Time Thermospheric Density Estimation via Two‐Line Element Data Assimilation

  title={Real‐Time Thermospheric Density Estimation via Two‐Line Element Data Assimilation},
  author={David J. Gondelach and Richard Linares},
  journal={Space Weather},
Inaccurate estimates of the thermospheric density are a major source of error in low Earth orbit prediction. Therefore, real‐time density estimation is required to improve orbit prediction. In this work, we develop a dynamic reduced‐order model for the thermospheric density that enables real‐time density estimation using two‐line element (TLE) data. For this, the global thermospheric density is represented by the main spatial modes of the atmosphere and a time‐varying low‐dimensional state and… 
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