Frequently Asked Questions

What payment methods do you accept?

Payments are securely processed by Stripe, which accepts nearly all credit cards. We also accept wire transfers, however additional fees may apply. Contact us for further information.

What are the benefits of subscribing?

There are many benefits of becoming a subscriber. Some of the more popular features include the ability to simulate large wavebands, multiple gases and multiple gas cells. Subscribers have access to publication quality graphics and can download the raw data in text format. They can store their simulation setups for recall in later sessions. Subscribers can also upload their own custom line lists for testing and validation. Emission spectra can be computed with an optional blackbody source function, and instrument lineshape functions can be customized and applied to the spectra.

What can I do for free?

The basic functionality of all the tools at SpectralCalc.com is freely available without subscribing. You can simulate transmittance spectra of gases with the same fast, accurate software used by many NASA remote sensing missions, and visually browse the HITRAN and other line list databases. The Blackbody Calculator, Atmosphere Browser and Solar Calculator are all freely available.