Profiles of O3 and aerosols are retrieved from measured OSIRIS limb radiances using the Saskmart algorithm. The algorithm employs the following key features
- Generates retrieval vectors using ratios of radiances. This makes the algorithm insensitive to errors in absolute calibration.
- Generation of altitude dependent weighting functions for each retrieval vector. Allows combination of different spectral regions
- Forward modelling of radiances using the Sasktran spherical radiative transfer model
- Inversion using a MART algorithm. Converges to consistent, physically meaningful solutions with minimal knowledge of initial conditions or a-priori.