References – HydroGNSS

1	M. J. Unwin et al., “An Introduction to the HydroGNSS GNSS Reflectometry Remote Sensing Mission,” in IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 14, pp. 6987-6999, 2021, doi: 10.1109/JSTARS.2021.3089550.
2	K. Rautiainen, D. Comite, J. Cohen, E. Cardellach, M. Unwin and N. Pierdicca, “Freeze–Thaw Detection Over High-Latitude Regions by Means of GNSS-R Data,” in IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-13, 2022, Art no. 4302713, doi: 10.1109/TGRS.2021.3125315.
3	M. Unwin, J. Rawlinson, L. King, G. Foti, M. Hammond and T. Burger, “GNSS-Reflectometry Activities on the DoT-1 Microsatellite in Preparation for the Hydrognss Mission,” 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, Brussels, Belgium, 2021, pp. 1288-1290, doi: 10.1109/IGARSS47720.2021.9554352.
4	E. Santi et al., “Combining Cygnss and Machine Learning for Soil Moisture and Forest Biomass Retrieval in View of the ESA Scout Hydrognss Mission,” IGARSS 2022 – 2022 IEEE International Geoscience and Remote Sensing Symposium, Kuala Lumpur, Malaysia, 2022, pp. 7433-7436, doi: 10.1109/IGARSS46834.2022.9884738.
5	D. Comite et al., “GNSS-R for Sustainable Development: A Review of the Geophysical Variables Addressed by the Hydrognss Mission,” IGARSS 2022 – 2022 IEEE International Geoscience and Remote Sensing Symposium, Kuala Lumpur, Malaysia, 2022, pp. 4216-4219, doi: 10.1109/IGARSS46834.2022.9884967.