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When the universe was roughly one billion years old, supermassive black holes (103-106 solar masses) already existed. The occurrence of supermassive black holes on such short time scales are poorly understood in terms of their physical or evolutionary processes. Our current understanding is limited by the lack of observational data due the limits of electromagnetic radiation. Gravitational waves as...
We report on the reflection properties of calibration targets required for calibrating the radiometric performance of the Microwave Sounder instruments for the MetOp-SG satellites prior to launch. Both fixed temperature, 80 K, and variable temperature, 80–315 K, targets are required to perform this task. The specifications, the preliminary baseline design of the target structure and its measured reflectivity...
This paper considers the design and manufacture, using stacked rings, of a standard corrugated antenna for the WM-380 band for use as a converter from a WM-380 rectangular aperture to a large diameter conical corrugated waveguide. In-house mode matching software is utilised for the design and three prototypes manufactured using stacked rings. The level of agreement of the stacked ring prototypes with...
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