9. The XCO2 measurement from OCO-2/OCO-3 is directly comparable to an in situ measurement at a surface site or a single point in the atmosphere.*5 pointsTrueFalse

10. XCO2 measurements from OCO-2 and OCO-3 can be combined together in an analysis.*5 pointsTrueFalse

16. The estimated accuracy of XCO2 from OCO-2 and OCO-3 when compared to the TCCON network is the following:*5 pointsLess than 45 ppmv for OCO-2 (v. 11.1) and less than 50 ppmv for OCO-3 (v. 10.4)Less than 20 ppmv for OCO-2 (v. 11.1) and less than 25 ppmv for OCO-3 (v. 10.4)Less than 5 ppmv for OCO-2 (v. 11.1) and less than 7 ppmv for OCO-3 (v. 10.4)Less than 0.8 ppmv for OCO-2 (v. 11.1) and less than 1 ppmv for OCO-3 (v. 10.4)

7. XCO2 is the mixing ratio of a single point in the atmosphere, which is a measure of the amount of carbon dioxide in the entire atmosphere.*5 pointsTrueFalse

8. What are the factors affecting the quality of the OCO measurements?*5 pointsCloudsOptically Thick AerosolsHigh Solar Zenith AnglesMountainous TerrainAll of the Above

14. The vertical sensitivity of a XCO2 measurement is described by a quantity that is supplied in the Level2 Lite product files. What is this quantity?*5 pointsThe Quality FlagThe Bias Corrected ValueThe Averaging KernelThe XCO2 Uncertainty