S4 (Shallow Subsurface Soil Spectroscopy) Technology
As the Subterra mobile laboratory moves along the grid, push-probe technology is used to drive a spectroscopic sensor one meter into the ground. During insertion, spectra are gathered every few centimeters along with other important information such as insertion pressure and electrical conductivity.
We can find hundreds of chemical signatures. Whether you are using a Subterra Grey to find clandestine graves or mapping a farm field with a Subterra Green to understand the distribution of soil organic carbon, our technology provides accurate, in situ, inexpensive, real-time results.
During operations, on-board data are compared to other sites across the world to determine baselines and avoid the delays of sending core samples to the lab. Afterwards, the new data collected are added to the global database.
Finally, a 3-D map of underground chemical compositions is made. From agricultural and environmental maps of soil organic carbon to maps showing the extent of Native American burials at construction sites, nothing hides from us.