Aura MLS Radiance Average Retrievals (RAR) HOCl product guideline

The retrieval methodology is based on the work described by Millán et al. (2012) and Millán et al. (2015) for BrO and HO2, respectively. In short, the retrieval algorithm produces a pair of zonal-mean abundance fields for each day, one for the ascending part of the orbit (mostly daytime) and the other for the descending part (mostly nighttime) on a grid with 6 surfaces per decade change in pressure (∼3 km). These are obtained from a 10◦ latitude bin zonal mean of radiances interpolated onto a 6 surface per decade pressure grid using the limb tangent pressure from the standard production data.

Due to the small spectral signature of HOCl in the MLS radiances, significant averaging (one or more weeks) is required to obtain scientifically useful results.

This document is for MLS L3 v6 products.