Essential Climate Variables (ECV) for permafrost

https://www.ncdc.noaa.gov/gosic/gcos-essential-climate-variable-ecv-data-access-matrix/gcos-land-ecv-permafrost

UK TechDemoSat-1 (TDS-1), a space-borne GNSS-R mission

http://merrbys.co.uk

GNSS reflectometry (GNSS-R) related publications, including peer reviewed journal papers, PhD dissertations, and books. This archive is maintained by GNSS+R community.

https://www.ice.csic.es/personal/rius/gnss_r_bibliography/index.html

Smallsat dataset explorer (including datasets from Planet, Spire, and EarthDEM)

https://csdap.earthdata.nasa.gov