In Situ Data

"Latin for 'in original place.' Refers to measurements made at the actual location of the object or material measured. Compare remote sensing." (National Aeronautics and Space Administration, 2017)

Sources

"Glossary". Earth Observatory, National Aeronautics and Space Administration. Last modified August 4, 2017.
https://www.earthobservatory.nasa.gov/glossary/all.
Accessed February 14, 2019.