Proceedings PaperCharacterization of instrument spectral resolution by the spectral modulation transfer function
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Comparison of the spectral resolving power of different types of spectrometer can be facilitated by the use of the spectral modulation transfer function (SMTF). It is the Fourier transform of the instrument spectral response function. The SMTF's of the two imaging spectrometers included in the Advanced Land Imager of the EO-1 satellite are shown as examples. The SMTF offers a way to specify the spectral resolution required for the detection of known spectral features. It can also be used to determine the ultimate resolution that can be achieved through processing signals form any given instrument and observation.