This site provides an interface to Goddard's Planetary Spectrum Generator (PSG), which can be used to generate high-resolution spectra of planetary bodies (e.g., planets, moons, comets, exoplanets). The spectroscopic suite can be also accessed remotely via the Application Program Interface (API). When requiring help on a specific input parameter, please click on the Help icon.

Calculation template Help
Target and geometry HelpTarget: Trappist1e for date (2017/12/24 06:00 UT); geometry: Observatory from 12.1000 pc.
Atmosphere and surface HelpSurface pressure: 1013 mbar; Molecular weight: 28.97 g/mol; Atmospheric profile: Earth_US-Standard; Gases: H2O,CO2,O3,N2O,CO,CH4,O2,N2; Surface temperature: 288.20 K; Albedo: 0.306; Emissivity: 0.694;
Instrument parameters HelpWavelength range 5-20 um with a resolution of 50 RP. Molecular radiative-transfer enabled; Continuum flux module enabled;