New space has opened up the potential for industries to develop Earth Observation platforms and provide scientific and operational quality data to research scientists and weather forecasters alike. Spire's constellation of nanosatellites uses signals from in-orbit GNSS satellites, such as GPS, GLONASS, Galileo, BeiDou and QZSS as signals of opportunity to sense changes in the atmosphere and surface characteristics of the planet and is relied upon for critical numerical weather prediction internationally.
Here we present observations available from the Spire nanosatellite constellation, consisting of over 100 cubesats in Low Earth Orbit. A subset of these have been repurposed from providing Radio Occultation measurements to providing ice surface and altimetry data, and others make up the built-for-purpose GNSS-Reflectometry mission. Data from these include soil moisture, ocean wind and MSS and cryosphere Level 2 data products in addition to derived variables of the surface (reflectivity, sigma0 etc.) and are made available through the ESA EarthNet (and NASA CSDA) program.