| Abstract: |
Metrology, the science of measurement, is discussed in terms of measurements of radiant flux and associated quantities. Radiometric measurements are naturally remote, that is, they are non-contact. A broad application is Earth science, as global measurements using satellites are spatially and temporally efficient and sufficiently long term to provide information on climate and global warming. Accurate radiometry requires thorough understanding of the measurement problem, complete description and understanding of the instruments, and mechanisms for comparing and assessing results. Here, we give an introduction to useful terminology and review some of the NIST activities in support of remote sensing, which involve portable sources and radiometers. |
