## Abstract

This paper focuses on sea surface height (SSH) estimation using GNSS direct and reflected signals observed via an airborne receiver. A power-ratio-based method is presented to compute the relative delay of the reflected signal, which is then used to estimate the SSH. The power ratio is defined as the ratio of the correlation power at the code phase over the peak correlation power. Preliminary results from processing airborne experimental data collected over duration of 1 minute demonstrate that the mean power ratios associated with four satellites are very similar. When such a single constant mean power ratio is used to estimate the relative delay and the SSH, the mean of the SSH estimation errors is 4.5cm and the error standard deviation (STD) is 1.08m in the presence of significant wave height of about 4 metres.

Original language | English |
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Title of host publication | GNSS+R 2012 |

Subtitle of host publication | 2012 Workshop on Reflectometry Using GNSS and Other Signals of Opportunity |

Place of Publication | Piscataway, NJ |

Publisher | Institute of Electrical and Electronics Engineers (IEEE) |

Pages | 1-6 |

Number of pages | 6 |

ISBN (Electronic) | 9781467328852, 9781467328845 |

ISBN (Print) | 9781467328838 |

DOIs | |

Publication status | Published - 2012 |

Externally published | Yes |

Event | 2012 Workshop on Reflectometry Using GNSS and Other Signals of Opportunity, GNSS+R 2012 - West Lafayette, IN, United States Duration: 10 Oct 2012 → 11 Oct 2012 |

### Other

Other | 2012 Workshop on Reflectometry Using GNSS and Other Signals of Opportunity, GNSS+R 2012 |
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Country/Territory | United States |

City | West Lafayette, IN |

Period | 10/10/12 → 11/10/12 |

## Keywords

- airborne experimental data
- correlation power ratio
- GNSS direct and reflected signals
- sea surface height estimation