Space‐based near‐infrared CO2 measurements: Testing the Orbiting Carbon Observatory retrieval algorithm and validation concept using SCIAMACHY observations over Park Falls, Wisconsin

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The on-orbit performance of the Orbiting Carbon Observatory-2 (OCO-2) instrument and its radiometrically calibrated products (2016, methodology): “Coincident measurements from the three spectral channels are combined into “soundings” that are analyzed with a stateof-the-art retrieval algorithm to yield estimates of XCO2 and other geophysical quantities (Bösch et al., 2006, 2011; O’Dell et al., 2012; Crisp et al., 2012; Eldering et al., 2016).”
Atmospheric carbon gases retrieved from SCIAMACHY by WFM-DOAS: version 0.5 CO and CH 4 and impact of calibration improvements on CO 2 retrieval (2006, background): “The FTIR CO2 averaging kernels are typically closer to 1.0 in the lower troposphere (within about 0.8–1.2, depending on altitude, solar zenith angle, etc.; see Bösch et al., 2006) than the WFM-DOAS v0.”
Retrieval of atmospheric CO2 with enhanced accuracy and precision from SCIAMACHY: validation with FTS measurements and comparison with model results (2011, methodology): “[5] Several somewhat different XCO2 retrieval algorithms for SCIAMACHY already exist [Buchwitz et al., 2000b; Buchwitz and Burrows, 2004; Buchwitz et al., 2005a, 2005b; Houweling et al., 2005; Barkley et al., 2006a, 2006c, 2006b; Bösch et al., 2006; Barkley et al., 2007; Schneising et al., 2008].”