Twenty-Five-Fold Reduction in Measurement Uncertainty for a Molecular Line Intensity.
Phys Rev Lett
; 123(4): 043001, 2019 Jul 26.
Article
em En
| MEDLINE
| ID: mdl-31491247
ABSTRACT
To accurately attribute sources and sinks of molecules like CO_{2}, remote sensing missions require line intensities (S) with relative uncertainties u_{r}(S)<0.1%. However, discrepancies in S of ≈1% are common when comparing different experiments, thus limiting their potential impact. Here we report a cavity ring-down spectroscopy multi-instrument comparison which revealed that the hardware used to digitize analog ring-down signals caused variability in spectral integrals which yield S. Our refined approach improved measurement accuracy 25-fold, resulting in u_{r}(S)=0.06%.
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MEDLINE
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En
Ano de publicação:
2019
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Article