@inproceedings{05f3972320b24600bfae17d58162ea5c,
title = "Exploring Spire GNSS Reflections for Global Soil Moisture Monitoring",
abstract = "Spaceborne GNSS reflectometry (GNSS-R) has emerged as an effective tool for observing soil moisture content at relatively high temporal and spatial resolutions. This study presents an initial evaluation of using reflection signals captured by Spire Global's GNSS-R satellites for global soil moisture monitoring, based on the sample data on Nov 1, 2023. The land surface is covered by ∼16.7\% when gridding the good-quality reflection samples into a map with a resolution of 36 km. Moreover, the Spire reflectivity observations of an example track over the region without dense vegetation show a good agreement with the SMAP soil moisture measurements, with a correlation coefficient of 0.71. The Spire soil moisture retrievals have a root mean square difference (RMSD) of 0.066 m3/m3, compared to the SMAP observations. More accurate Spire soil moisture measurements are expected after correcting the impact of vegetation, surface roughness, and signal incidence angles.",
keywords = "GNSS, GNSS reflectometry, Spire Global, reflectivity, soil moisture",
author = "Jiahua Zhang and Weiss, \{Jan Peter\} and John Braun",
note = "Publisher Copyright: {\textcopyright} 2024 IEEE.; 2024 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2024 ; Conference date: 07-07-2024 Through 12-07-2024",
year = "2024",
doi = "10.1109/IGARSS53475.2024.10642541",
language = "English",
series = "International Geoscience and Remote Sensing Symposium (IGARSS) ",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "5187--5190",
booktitle = "IGARSS 2024 - 2024 IEEE International Geoscience and Remote Sensing Symposium, Proceedings",
address = "United States",
}