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 icon.

Calculation template	Load	Select template Upload config-file Upload spectrum Asteroid from JWST Comet 67P from Rosetta Comet from IR observatory Comet from Radio observatory Concept LUVOIR Concept OST Earth transmittance ExoTransit from JWST Mars from ALMA Mars from ExoMars Mars from JWST Mars from observatory Pluto from New Horizons Pluto from Radio observatory Retrieval Sun from Earth Titan from ALMA Titan from Cassini Uranus from ALMA Browse   File units um nm mm Ang cm-1 MHz GHz kHz W W/um W/cm-1 W/sr W/sr/um W/sr/cm-1 W/sr/m2 W/sr/m2/um W/sr/m2/cm-1 W/sr/m2/Hz Jy/arcsec2 K (radio) W/m2 erg/s/cm2 W/m2/um W/m2/cm-1 Jy mJy m (magnitude)
Target and geometry	Change	Target: Trappist1e for date (2017/12/24 06:00 UT); geometry: Observatory from 12.1000 pc.
Atmosphere and surface	Change	Surface 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	Change	Wavelength range 5-20 um with a resolution of 50 RP. Molecular radiative-transfer enabled; Continuum flux module enabled;

 

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