Optical design of the stratosphere-troposphere exchange and climate monitor radiometer (STEAMR) instrument
european conference on antennas and propagation(2011)
Abstract
In this paper we present details of the design and optimisation for the optics for the STEAMR multi-beam limb sounder instrument. This optimisation process was required to achieve the simultaneous goals of beam amplitude circularisation and phase shift matching and was conducted using a combination of analytical methods. These goals were subsequently achieved optically with the use of ‘astigmatic’ reflectors. The results of this optimisation have been verified through a combination of first order Gaussian beam analysis coupled with Physical Optics calculations. Additionally the concept and design of a focal plane array element which will couple the individual beams to the corresponding feed horns is presented.
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Key words
infrared,first order,radiometers,optics,structural beams,feed horn,optimization,imaging spectrometer,physical optics,trace gases,spatial resolution,azimuth,phase shift
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