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Article: Research from University of Bern in the area of antennas and propagation described.
- Article from:
- Journal of Engineering
- Article date:
- October 7, 2009
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"are presented for the telescope optics verification of the TELIS instrument which is developed and constructed at the Deutsches Zentrum fur Luft- und Raumfahrt (DLR), Germany. TELIS is a balloon-borne limb-sounding radiometer which measures pressure-broadened emission lines of various species of the earth's atmosphere," researchers in Bern, Switzerland report.
"Due to the strong brightness gradient in the limb-viewing geometry the antenna beam of the instrument needs to be well-defined in order to ensure proper operation. Near-field measurements made at 637 GHz of the TELIS telescope were used to derive the far-field pattern. Error compensation included ...