Permafrost
Measurement Instruments
Measurement Definition: Fraction of an area that is persistently frozen (round the year) - Physical unit: [ % ] - Accuracy unit: [ % ].
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| OLI | Operational | Measures surface radiance, land cover state, and change (e.g., vegetation type). Used as multi-purpose imagery for land applications. | n/a |  |
| OLI-2 | Operational | Measures surface radiance, land cover state, and change (e.g., vegetation type). Used as multi-purpose imagery for land applications. | n/a | |
| SAR (RCM) | Operational | All-weather, C-band data to support ecosystem monitoring, maritime surveillance and disaster management. | n/a | |
| TIRS | Operational | Measures longwave thermal infrared surface emittance, land cover state, and change. Used as multipurpose imagery for land applications. | n/a | |
| TIRS-2 | Operational | Measures longwave thermal infrared surface emittance, land cover state, and change. Used as multipurpose imagery for land applications. TIRS-2 will adhere to the Landsat 8 TIRS instrument performance specifications but will be built to NASA Class-B instrument standards (including a 5-year design life). | n/a | |
| LandIS | Proposed | Measures surface radiance, land cover state and change (e.g., vegetation type), and longwave termal infrared surface emittance. Used as multi-purpose imagery for land applications. | n/a | |