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Understanding Regression Based on X and Y in Atmospheric Instrument Precision Analysis

This report compares the reliability of various instruments measuring air components in the atmosphere. The variability of the results for each instrument is analyzed to determine the precision and accuracy of the measurements. Time series data is used to calculate the uncertainties based on reported values and bias corrections.

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Understanding Regression Based on X and Y in Atmospheric Instrument Precision Analysis

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  1. Regression based on x vs. y WP-3D random variability is far larger than the range of variation of the other instruments

  2. DC-8 NCAR 2σ uncertainty: Reported by point DC-8 URI 2σ uncertainty: 33 pptv + 15% WP-3D 2σ uncertainty: 800-2000 pptv for 7/31 and 500-1200 pptv for 8/07 BAe-146 2σ uncertainty: precision 24% + 50 pptv, accuracy 60% + 50 pptv * Calculated after bias correction

  3. Time Series

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