Abstract The Spectral Physics Environment for Advanced Remote Sensing (SPEARS)
application programming interface (API) is a Python-based, line-by-line, local thermal
equilibrium (LTE) spectral modeling code which is optimized for simultaneously synthesizing
optical spectra from any combination of fundamental spectroscopic databases. In this article,
we contribute two novel spectral modeling techniques to the scientific literature. First we
describe how SPEARS integrates a physics-based collisional model for calculating pressure …