Surface rover or ISRU missions: Mars2020 rover, Venus Mobile Explorer (VME), Lunar Resource Prospector. In addition, the tool could be deployed on landers such as Venus In Situ Explorer, Lunar Geophysical Network etc. Stinger could be adapted for Astronaut deployment as well. NASA ISRU and excavation mission would also need to determine soil properties.
The tool can be used by DoD to perform soil strength assessment before landing planes and establishing camps (we are already commercializing a prior SBIR tool with DoD). Market also includes agriculture, road construction, mining (e.g. stability of tailings), and soil remediation.