### Abstract

Original language | English |
---|---|

Pages (from-to) | 1515-1528 |

Number of pages | 14 |

Journal | Journal of Geodesy |

Volume | 93 |

Issue number | 9 |

Early online date | 10 Jun 2019 |

DOIs | |

Publication status | Published - 30 Sep 2019 |

### Fingerprint

### Keywords

- solar radiation pressure
- analytical force models
- GPS
- orbit determination
- orbit prediction

### Cite this

*Journal of Geodesy*,

*93*(9), 1515-1528. https://doi.org/10.1007/s00190-019-01265-7

}

*Journal of Geodesy*, vol. 93, no. 9, pp. 1515-1528. https://doi.org/10.1007/s00190-019-01265-7

**Demonstrating developments in high-fidelity analytical radiation force modelling methods for spacecraft with a new model for GPS IIR/IIR-M.** / Bhattarai, S.; Ziebart, M.; Allgeier, S.; Grey, S.; Springer, T.; Harrison, D.; Li, Z.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Demonstrating developments in high-fidelity analytical radiation force modelling methods for spacecraft with a new model for GPS IIR/IIR-M

AU - Bhattarai, S.

AU - Ziebart, M.

AU - Allgeier, S.

AU - Grey, S.

AU - Springer, T.

AU - Harrison, D.

AU - Li, Z.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - This paper presents recently developed strategies for high-fidelity, analytical radiation force modelling for spacecraft. The performance of these modelling strategies is assessed using a new model for the Global Positioning System Block IIR and IIR-M spacecraft. The statistics of various orbit model parameters in a full orbit estimation process that uses tracking data from 100 stations are examined. Over the full year of 2016, considering all Block IIR and IIR-M satellites on orbit, introducing University College London’s grid-based model into the orbit determination process reduces mean 3-d orbit overlap values by 9% and the noise about the mean orbit overlap value by 4%, when comparing against orbits estimated using a simpler box-wing model of the spacecraft. Comparing with orbits produced using the extended Empirical CODE Orbit Model, we see decreases of 4% and 3% in the mean and the noise about the mean of the 3-d orbit overlap statistics, respectively. In orbit predictions over 14-day intervals, over the first day, we see smaller root-mean-square errors in the along-track and cross-track directions, but slightly larger errors in the radial direction. Over the 14th day, we see smaller errors in the radial and cross-track directions, but slightly larger errors in the along-track direction.

AB - This paper presents recently developed strategies for high-fidelity, analytical radiation force modelling for spacecraft. The performance of these modelling strategies is assessed using a new model for the Global Positioning System Block IIR and IIR-M spacecraft. The statistics of various orbit model parameters in a full orbit estimation process that uses tracking data from 100 stations are examined. Over the full year of 2016, considering all Block IIR and IIR-M satellites on orbit, introducing University College London’s grid-based model into the orbit determination process reduces mean 3-d orbit overlap values by 9% and the noise about the mean orbit overlap value by 4%, when comparing against orbits estimated using a simpler box-wing model of the spacecraft. Comparing with orbits produced using the extended Empirical CODE Orbit Model, we see decreases of 4% and 3% in the mean and the noise about the mean of the 3-d orbit overlap statistics, respectively. In orbit predictions over 14-day intervals, over the first day, we see smaller root-mean-square errors in the along-track and cross-track directions, but slightly larger errors in the radial direction. Over the 14th day, we see smaller errors in the radial and cross-track directions, but slightly larger errors in the along-track direction.

KW - solar radiation pressure

KW - analytical force models

KW - GPS

KW - orbit determination

KW - orbit prediction

U2 - 10.1007/s00190-019-01265-7

DO - 10.1007/s00190-019-01265-7

M3 - Article

VL - 93

SP - 1515

EP - 1528

IS - 9

ER -