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Effects of Resonances in Corrugated Horn Antennas for a 22-GHz Balancing Radiometer
DeWachter, E.,Murk, A.,Straub, C.,Haefele, A.,Soohyun Ka,Jung Jin Oh,Kampfer, N. IEEE 2009 IEEE geoscience and remote sensing letters Vol.6 No.1
<P>The Stratospheric WAter vapor RAdiometer (SWARA) is a microwave radiometer designed for ground-based measurements of water vapor (H<SUB>2</SUB>O) in the middle atmosphere (20 to 80 km), including the stratosphere and mesosphere. The instrument is operating in a noncryogenic balancing calibration mode. Since its deployment, features have been observed in the spectrum which can be attributed to resonant variations of the antenna pattern of the corrugated horn. This paper presents copolar and crosspolar antenna pattern measurements of two sister antennas of the SWARA horn, as well as water vapor measurements from both antennas on the ground-based microwave radiometer <B>MI</B> ddle Atmospheric <B>W</B>Ater vapor <B>RA</B> diometer. We show that small irregularities in the frequency spectrum at the -20-dB level are visible in the copolar pattern, which, due to the balancing operation scheme used for the radiometer, lead to features in the spectrum that have the same or even higher brightness temperature as the line of interest.</P>
Development of gene-specific markers for Phosphorus uptake 1(Pup1) and Pi-gene specific markers
Joong Hyoun Chin,Cheryl O. Dalid,Maria Ruby Burgos,Stephan Haefele,Matthias Wissuwa,Masdiar Bustamam,Yohei Koide,Ona Isabelita,Nobuya Kobayashi,Casiana Vera Cruz,Sigrid Heuer 한국육종학회 2010 한국육종학회 학술발표회 발표요지 Vol.42 No.1