Bias (solid) and ±1 sigma variability (dashed) of CloudSat-AIRS cloud top height differences for V4 (black) and V5 (red), and for the upper (top panel) and lower (bottom panel). Improvements to cloud retrievals were obtained in V5 over V4, which are more apparent in the upper cloud layer comparisons. In fact, the high height biases for low clouds decreases by 1-4 km and the low height biases in high clouds decreases by 0.5-1.0 km.
Kahn, B. H., Chahine, M. T., Stephens, G. L., Mace, G. G., Marchand, R. T., Wang, Z., Barnet, C. D., Eldering, A., Holz, R. E., Kuehn, R. E., and Vane, D. G.: Cloud type comparisons of AIRS, CloudSat, and CALIPSO cloud height and amount, Atmos. Chem. Phys., 8, 1231-1248, 2008.