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## O3 Retrieval Vectors

The version 5.0.xx retrieval algorithms use 11 unique wavelengths to generate 8 ozone retrieval vectors. 7 vector are in the Hartley Huggins region and 1 is in the Chappuis region. The large selection of retrieval vectors allows the algorithm to have good sensitivity across the entire alitude range.

Spectral Region Retrieval Vector
Hartley Huggins $$y_{j,k} = \ln\left( \frac{I(j,\lambda_{ref})}{I(j,\lambda_{abs})}\right)$$
Chappuis $$y_{j,k} = \ln\left(\frac{\sqrt{I(j,\lambda_{ref1})I(j,\lambda_{ref2})}}{I(j,\lambda_{abs})}\right)$$

 $$\lambda_{ref}$$ nm $$\lambda_{abs}$$ nm 292.43 350.31 302.17 350.31 306.06 350.31 309.58 350.31 315.82 350.31 322.00 350.31 331.09 350.31

 $$\lambda_{ref1}$$ nm $$\lambda_{abs}$$ nm $$\lambda_{ref2}$$ nm 543.84 602.39 678.85