The Exposure Time Calculator (ETC) is a tool to predict the performances of the spectrometer for different parameters and environmental conditions.

The ETC computes the signal to noise ratio achievable for a given object in a given exposure time, at a given magnitude and airmass. The ETC is now taking into account the new efficiencies and it uses spectra as input parameters.

The command line ETC is available here.

A new web interface is under construction