Published April 17, 2026 | Version 1.4
Dataset Open

POSEIDON Input Files

Authors/Creators

  • 1. University of Michigan
  • 2. Cornell University
  • 3. EDMO icon California Institute of Technology

Contributors

Contact person:

  • 1. University of Michigan
  • 2. Cornell University
  • 3. EDMO icon California Institute of Technology

Description

This repository contains the input files required by the POSEIDON atmospheric retrieval code. The input files consist of molecular, atomic, and ionic cross sections, Mie scattering aerosol properties, model grids of stellar spectra, a chemical equilibrium grid, and a surface albedo database.

See the installation instructions for the next steps after the download is complete. 

v1.4

  • Added surface albedo/reflectivity database.
  • H2-H CIA added.

v1.3.1

  • Updated aerosol database.
  • He-H CIA added.
  • DMS (C2H6S), DMDS (C2H6S2), CH3SH, and C3H4 added to the gas-phase opacity database.

v1.3

  • No changes to the input files from v1.2.

v1.2

  • Added a Mie scattering database of aerosol optical properties.
  • Updated POSEIDON gas-phase opacity database.
  • Both databases are described on a new documentation page: POSEIDON Opacity Database.

v1.1

  • Added a chemical equilibrium grid computed with Fastchem 2.
  • New, simplified, input file structure used by POSEIDON v1.1.
  • One download, easier installation.

Files

inputs.zip

Files (72.1 GB)

Name Size Download all
md5:8a3da02d76f9d2fcc510e9baa7dfebf7
72.1 GB Preview Download

Additional details

Related works

Is published in
Publication: 10.21105/joss.04873 (DOI)
Publication: 10.1093/mnras/stx804 (DOI)

Dates

Updated
2026-04-17
v1.4 release

Software

Repository URL
http://github.com/MartianColonist/POSEIDON
Development Status
Active