ABSOLUTE STANDARDS FOR CLIMATE MEASUREMENTS
In a world of changing climate, political uncertainty, and ever-changing budgets, the benefit of measurements traceable to SI standards increases by the day. To truly resolve climate change trends on a decadal time scale, on-orbit measurements need to be referenced to something that is both absolu...
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-10-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B8/1407/2016/isprs-archives-XLI-B8-1407-2016.pdf |
| Summary: | In a world of changing climate, political uncertainty, and ever-changing budgets, the benefit of measurements traceable to SI
standards increases by the day. To truly resolve climate change trends on a decadal time scale, on-orbit measurements need to be
referenced to something that is both absolute and unchanging. One such mission is the Climate Absolute Radiance and Refractivity
Observatory (CLARREO) that will measure a variety of climate variables with an unprecedented accuracy to definitively quantify
climate change. In the CLARREO mission, we will utilize phase change cells in which a material is melted to calibrate the
temperature of a blackbody that can then be observed by a spectrometer. A material’s melting point is an unchanging physical
constant that, through a series of transfers, can ultimately calibrate a spectrometer on an absolute scale. CLARREO consists of two
primary instruments: an infrared (IR) spectrometer and a reflected solar (RS) spectrometer. The mission will contain orbiting
radiometers with sufficient accuracy to calibrate other space-based instrumentation and thus transferring the absolute traceability.
The status of various mission options will be presented. |
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| ISSN: | 1682-1750 2194-9034 |