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Delivered IQ Versus Airmass

The plots below indicate how delivered optical IQ (50% encircled energy) changes as a function of airmass for different image quality bins assuming IQ(X)=IQ(zenith)*X0.6. The delivered IQ for a bin is the region below the line above the bin label. The bin limits at zenith (airmass of 1.0) assuming use of the peripheral wavefront sensors are given on the Observing Conditions Constraints page.

u band (0.350 um)

IQ vs airmass - u band

g band (0.475 um)

r band (0.630 um)

IQ vs airmass - r band

i band (0.780 um)

IQ vs airmass I band

 

J band (1.2 um)

IQ vs airmass J band

H band (1.65 um)

IQ vs airmass H band

K band (2.2 um) 

IQ vs airmass K band