ZeemanStokes

Full-Stokes Zeeman-splitting effect has wide applications in remote sensing. This tool provides an online interactive platform to generate instantaneous polarimetric radiances with 4 Stokes parameters and their Jacobians near the 118.75 O2 spectral line by taking user specified inputs. It is designed as an easy-to-use tool for mission/instrument developers as well as serving the purpose of education.

This tool employs the full-Stokes simulation capability enabled by the Atmospheric Radiative Transfer Simulator (ARTS), an open-source radiative transfer model at the backend. Furthermore, it has been integrated seamlessly with Earth's whole atmosphere and magnetic field models that CCMC currently hosts (e.g., NRLMSISE, IRGF). User will be prompted with options to visualize results from instantaneously generated plots or download results for further analysis.

Currently it only simulates the 118 GHz O2 line for supporting the EZIE mission with nadir and near-nadir line-of-sight. Depending on future opportunities and user feedback, we will consider including more gas lines in the future, along with a limb sounding option. For additional user options such as netCDF file output, please visit the public ZeemanStokes code repository.

NRLMSISE-00 atmospheric model, Internation Geomagnetic Reference Field – 13th Generation (IRGF13), and user inputs (sensor position, viewing geometry, latitude/longitude/time).

Plots are generated for the 4 Stokes parameters (I, Q, U, V). Users may select to view plots for radiance or one of the Jacobian quantities (Temperature, O2 VMR, Bu, Bv, Bw, |B|). The Stokes radiance and Jacobian can be downloaded from as a JSON file.