Extreme Precision Doppler Spectrometer Exposure Time Calculator v1.1

Object Type (assume all point source)

V band magnitude = mag
Calculator Mode:
Calculator Input:(Exposure Time [seconds]{S/N Calc.}
or Required S/N {Exp. Time Calc})
Wavelength of Interest: angstroms
Sky Magnitude:V band magnitude (22mag default)
Throughput Type:
Custom Throughput
(if applicable):
decimal throughput
(assumed constant across wavelength)

README before you try the ETC