Far Infrared Astronomy Instruments

Currently there is a lack of observational capability in the Far Infrared. ALMA (Wootten and Thompson 2009) will explore a number of wide atmospheric windows at millimeter wavelengths, and at longer wavelengths in the radio region astronomers 

To achieve high angular resolution one needs to use interferometry, and to operate at the Far Infrared the best scenario is a space based system, where there is no attenuation from the atmosphere. With this requirements the Far Infrared Interferometer concept, FIRI, is defined. 

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