This is an echelle simulator for iSHELL (Immersion Grating Echelle Spectrograph) at the NASA Infrared Telescope Facility (IRTF). It employs a set of ab-initio grating equations and simplified parameters that are accurate enough to describe the overall behavior of the cross-dispersors and the gratings. Developed by Sara Faggi, Geronimo Villanueva and Michael Mumma at NASA-GSFC.
 
Setting:       Upper-wavelength [um]:


Slit [arcsec]:    Spectral unit:   Flip y-axis


 


 
3094.9253120.2173113.9863139.4343133.0483158.653152.113177.8673171.1723197.0833190.2333216.2993209.2953235.5153228.3573254.7323247.4193273.9473266.483293.1643285.5433312.383304.6043331.5983323.6673350.8133342.7293370.033361.793389.246

 

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