Figure 2. The Band-Average relative spectral responses presented here are averages of the responses from the 14 focal plane modules (FPMs). There is some filter-to-filter variability between the modules, more so in bands where filters from different production lots were used on different modules.
For the Coastal/Aerosol band (Band 1), ten of the modules have filters from the first wafer and four modules have filters from the second wafer. The band-average response reflects the differences between the wafers.
In the case of the Green band (Band 3), all the filters came from the same wafer, so there is no difference between the wafer-average response and the band-average response.