archNEMESIS code

ArchNEMESIS is an open-source Python package developed for the analysis of remote sensing spectroscopic observations of planetary atmospheres. It is based on the widely used NEMESIS (Non-linear Optimal Estimator for MultivariatE Spectral analySIS) radiative transfer and retrieval tool, which has been extensively used for the investigation of a wide variety of planetary environments.

ArchNEMESIS is currently maintained by Juan Alday and Joseph Penn. The NEMESIS algorithm, code archNEMESIS is based on, was originally developed by Patrick Irwin.

19/06/25 - New release of the archNEMESIS code (v1.0.2) with some updates with respect to the previous version: Fixed minor bugs throughout the code. Included new model parameterisations. Included new automatic tests (e.g., forward models for solar occultation and limb geometry). Flags now identified with ENUMS rather than magic numbers. Model parameterisations now defined as classes.