Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Andreas Magun"'
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 46:2323-2336
The Scanning Polarimetric Imaging Radiometer (SPIRA) is a versatile fully polarimetric imager operating at 91 GHz. It is designed for measurements of polarimetric signatures of the Earth's surface and man-made objects. SPIRA combines a method for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9704611e43c8883c1b3df82b70687f5d
https://doi.org/10.1109/tgrs.2008.917212
https://doi.org/10.1109/tgrs.2008.917212
Publikováno v:
The Astrophysical Journal. 678:509-514
Radio observations at 210 GHz taken by the Bernese Multibeam Radiometer for KOSMA (BEMRAK) are combined with hard X-ray and γ-ray observations from the SONG instrument on board CORONA-F and the Reuven Ramaty High Energy Solar Spectroscopic Imager (R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5feb7b79a9efc60e29c853a5bbeb9c83
https://doi.org/10.1086/528787
https://doi.org/10.1086/528787
Autor:
Paulo J. A. Simões, C. G. Giménez de Castro, Joaquim E. R. Costa, Adriana V. R. Silva, Andreas Magun, Emilia Correia
Publikováno v:
Astronomy & Astrophysics. 457:693-697
During the rising phase of the radio burst of August 30, 2002, at ∼1328 UT a short pulse with a duration of approximately 4 s was observed. Here we present a multiwavelength analysis, including microwave and X-ray. Its background-subtracted radio s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb6ceadfe9da19d5cc50b0c6654daa62
https://doi.org/10.1051/0004-6361:20054438
https://doi.org/10.1051/0004-6361:20054438
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 53:1168-1173
We propose a new quasi-optical setup for a nulling interferometer at short millimeter and submillimeter wavelengths employing a single Martin-Puplett interferometer (MPI) for sideband separation. The new design allows the simultaneous use of both sid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0653fa21f0fb00bf7ed30d6a1e1adcc4
https://doi.org/10.1109/tmtt.2005.845727
https://doi.org/10.1109/tmtt.2005.845727
Autor:
Andreas Ludi, Andreas Magun
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 67:435-447
The refractivity structure constant C n 2 and length scales of turbulence are measured at mm-wavelengths with line-of-sight propagation experiments at an average height of 200 m above ground at Bern (Switzerland) and El Leoncito (Argentina) in the st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b00e2b2e739b46ab6a3aaeffd1fd8a23
https://doi.org/10.1016/j.jastp.2004.10.006
https://doi.org/10.1016/j.jastp.2004.10.006
Publikováno v:
Astronomy & Astrophysics. 420:361-370
We report on the study and successful application of an improved measurement method for solar flares at millimeter wavelengths. A 210 GHz multibeam receiver for the observation of solar bursts was installed in the KOSMA 3 m telescope on the Gornergra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::471914a50076debb0718fefdaddbcad4
https://doi.org/10.1051/0004-6361:20035899
https://doi.org/10.1051/0004-6361:20035899
Publikováno v:
Astronomy & Astrophysics. 415:1123-1132
We present the first solar flare observations with the KOSMA submillimeter telescope at 230 and 345 GHz. The GOES X2.0 flare on April 12, 2001 was also observed at millimeter and centimeter wavelengths, as well as in soft and hard X-rays. It exhibits
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98d6b727c88dd80bccdae73b49f30a41
https://doi.org/10.1051/0004-6361:20034624
https://doi.org/10.1051/0004-6361:20034624
Publikováno v:
Astronomy & Astrophysics. 396:683-692
We present a multi-wavelength analysis of a gradual radio flare on June 27, 1993 which showed emission at millimeter waves long after the soft X-ray flux had peaked. The radio flare located at S12 E75 was associated with a GOES class M3.6 flare that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fee59be549f15de35cbb31dbfc6cdbe7
https://doi.org/10.1051/0004-6361:20021431
https://doi.org/10.1051/0004-6361:20021431
Autor:
Joaquim E. R. Costa, P.R. Lagrotta, Pierre Kaufmann, G. A. Bazilevskaya, M.A. Shea, V. S. Makhmutov, K. Arzner, Andreas Magun
Publikováno v:
Advances in Space Research. 29:2101-2104
Itapetinga measurements at 48 GHz with the multibeam technique are used to determine the relative position of solar burst centroid of emission with high spatial accuracy and time resolution. For the Great Bursts of October 19,22, 1989, with a large p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2b45ca557625c7d6a7a55bb8a342a96
https://doi.org/10.1016/s0273-1177(02)00235-1
https://doi.org/10.1016/s0273-1177(02)00235-1
Publikováno v:
Astronomy & Astrophysics. 387:1153-1160
Beam patterns of radio telescopes with moderate (arcmin) angular resolution in the millimeter and sub-millimeter range are difficult to measure as only weak sources are available in that spectral range. This limitation can be overcome with the deconv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19fb8d5e85a95e796e52a56cc784c261
https://doi.org/10.1051/0004-6361:20020379
https://doi.org/10.1051/0004-6361:20020379