Figure 1: Typical example of averaged spectra from observation
in the northern hemisphere during early summer, with the corresponding
vertical profile of water vapor mixing ratio and a demonstration of
sensitivity along the vertical for the synergy. Top left) SPICAM-IR
spectrum. Top right) Averaged PFS spectrum. Data in black and fit in red
for both panels. Bottom left) Vertical profile of water vapor as
obtained from simultaneous retrieval of both spectral domains, along
with MCD prior vertical profile. Bottom center) Averaging kernel for
retrieval made with the spectral synergy method, SPICAM/NIR, and
PFS/TIR. Bottom right) Posterior-to-prior error ratio by altitude for
synergistic retrieval and single spectral domain retrievals.
3.2 Data selection scheme
The complete synergy dataset is shown in Figure 2, where the seasonal
coverage for all synergy column abundance retrievals are displayed as a
function of latitude. Retrievals from MY 27 encompass more than 30% of
all co-located observations. The total water columns here are not
corrected for topography.