Table 1. Summary of the Proxy and Physics-Based Retrieval Characteristics


Method	Proxy CH4	Proxy CO2	Physics-Based

Spectral window ID	3	2	2'	1	2	3	4
Spectral window, mum	[1.629, 1.679]	[1.591, 1.622]	[1.560, 1.594]	[0.758, 0.774]	[1.591, 1.622]	[1.629, 1.679]	[2.042, 2.081]
Target absorber	CH4	CO2	CO2			CH4	
Interfering absorbers	H2O, CO2	H2O	H2O	O2a	CO2, H2O	CO2, H2O	CO2, H2O
Aerosol parameters	-	-	-	Ns, alphas, zs

aNot retrieved, but calculated from pressure.