# Earth Observation **Concept class:** Planetary sensing and remote-measurement domain ## Definition **Earth observation** uses satellite, airborne, terrestrial, and in-situ instruments to measure the planet’s land, oceans, atmosphere, ice, ecosystems, infrastructure, and changing hazards. Optical, thermal, radar, LiDAR, gravimetric, and other sensing modes describe different physical properties and carry different uncertainty, revisit, resolution, and weather constraints. ## Relationships - **SAR provider:** [[wiki/ICEYE|ICEYE]]. - **ecological mapping:** [[wiki/Space Intelligence|Space Intelligence]]. - **market bridge:** [[wiki/ICE Commodity Traceability|ICE Commodity Traceability]] and [[wiki/Observation-to-Decision Stack|Observation-to-Decision Stack]]. - **method route:** [[wiki/Synthetic Aperture Radar|Synthetic Aperture Radar]], remote sensing, change detection, geospatial modeling, and validation. - **disambiguation route:** [[wiki/ICE|ICE disambiguation]]. ## Sources / Provenance - [NASA Earthdata — Earth Observation Data](https://www.earthdata.nasa.gov/learn/backgrounders/remote-sensing) - [ICEYE — SAR data](https://www.iceye.com/sar-data)