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- W4313195575 abstract "This paper presents an updated evaluation of the coherency of grazing-angle ocean reflected GPS signals received on low-cost Spire CubeSat receivers. It is based on almost a year of dual-frequency carrier-phase observations sampled at 50 Hz from 2020. This dataset contains more than 2000 ocean reflections every week in 2020. As expected, coherency increases for low grazing angles: by a factor 20 from grazing angles above 20° to below 10° in the Indonesian Seas. Coherency also increases for smooth ocean surface conditions: by a factor 80 for Significant Wave Height (SWH) decreasing from 1.5 m to 0.5 m using grazing angles below 10°. The results provide clear relationships between coherency and various ocean surface parameters. Overall coherency is more sensitive to SWH with an almost exponential trend, followed by mean wave period, and less by wind speed which shows a relatively constant behavior for wind speeds < 4 m/s. The mean wave direction relative to the specular point along-track direction has no effect on coherency for wave periods less than 5s." @default.
- W4313195575 created "2023-01-06" @default.
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- W4313195575 date "2022-07-17" @default.
- W4313195575 modified "2023-10-16" @default.
- W4313195575 title "Updated Coherency Assessment of Spaceborne GNSS Ocean Reflections from a Year of Spire Data" @default.
- W4313195575 cites W2997873483 @default.
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- W4313195575 doi "https://doi.org/10.1109/igarss46834.2022.9884597" @default.
- W4313195575 hasPublicationYear "2022" @default.
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