Zobrazeno 1 - 10
of 38
pro vyhledávání: '"D. Keuer"'
Autor:
D. Keuer
Publikováno v:
Advances in Radio Science, Vol 17, Pp 205-212 (2019)
Phase height measurements of low frequency radio waves are used to study the long-term variability of the mesosphere over Europe. Phase height measurements use a characteristic pattern in field strength registration of radio waves interpreted as phas
Externí odkaz:
https://doaj.org/article/e3e1de50af73407f838111e3fc0bf737
Publikováno v:
Advances in Radio Science, Vol 8, Pp 237-241 (2010)
The determination of the meteoroid flux is still a scientifically challenging task. This paper focusses on the impact of extraterrestrial noise sources as well as atmospheric phenomena on the observation of specular meteor echoes. The effect of cosmi
Externí odkaz:
https://doaj.org/article/2724c255d64b47e1a8a0baca82f8272b
Publikováno v:
Annales Geophysicae, Vol 25, Pp 1779-1790 (2007)
Continuous MF radar observations at the station Juliusruh (54.6° N; 13.4° E) have been analysed for the time interval between 1990 and 2005, to obtain information about solar activity-induced variations, as well as long-term trends in the mesosp
Externí odkaz:
https://doaj.org/article/9100e1553cf24225992272e25768ec29
Publikováno v:
Meteorologische Zeitschrift, Vol 6, Iss 5, Pp 225-229 (1997)
The mesopause region wind field over Central Europe has been continually recorded by daily low-frequency total reflection wind measurements using commercial radio transmitters at the Collm Observatory of the University of Leipzig, and by medium-frequ
Externí odkaz:
https://doaj.org/article/2c59d55c28404c0bb2f47c0e674d0b71
Publikováno v:
Meteorologische Zeitschrift, Vol 3, Iss 5, Pp 297-300 (1994)
Continuous monitoring of the mesospheric and lower thermospheric wind field in northern mid-latitudes is carried out by LF windprofiler and MF radar measurements at Collm (51.3°N, 13°E) and Juliusruh (54.6°N, 13.5°E) resp., the centre of the refl
Externí odkaz:
https://doaj.org/article/660d56c796e042c7bfb11e6846fba797
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 450:1460-1464
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a8cd045dfd68fd47fc86b7c1baeb337
https://doi.org/10.1093/mnras/stv614
https://doi.org/10.1093/mnras/stv614
Publikováno v:
Advances in Radio Science, Vol 8, Pp 237-241 (2010)
The determination of the meteoroid flux is still a scientifically challenging task. This paper focusses on the impact of extraterrestrial noise sources as well as atmospheric phenomena on the observation of specular meteor echoes. The effect of cosmi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a557df0956707134a997bc1d7e925a8b
http://www.adv-radio-sci.net/8/237/2010/ars-8-237-2010.pdf
http://www.adv-radio-sci.net/8/237/2010/ars-8-237-2010.pdf
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 69:2355-2366
Continuous MF and meteor radar observations allow detailed studies of winds in the mesosphere and lower thermosphere (MLT) as well as temperatures around the mesopause. This height region is characterized by a strong variability in winter due to enha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6520f476893bd5ba6111d99330f38e5
https://doi.org/10.1016/j.jastp.2007.06.010
https://doi.org/10.1016/j.jastp.2007.06.010
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 64:1229-1240
Continuous wind observations allow detailed investigations of the upper mesosphere circulation in winter and its coupling with the lower atmosphere. During winter the mesospheric/lower thermospheric wind field is characterized by a strong variability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d621cb411d7327f65292e4744bd42ccb
https://doi.org/10.1016/s1364-6826(02)00071-8
https://doi.org/10.1016/s1364-6826(02)00071-8
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 63:201-214
Observations of polar mesosphere summer echoes (PMSE) were performed with the ALOMAR SOUSY VHF radar in the Doppler beam swinging (DBS) and the spaced antenna (SA) mode. This radar is located in polar regions at 69°N, 16°E in Andenes, Norway. After
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b143e9a1a4081f58c97b913f5c9777f
https://doi.org/10.1016/s1364-6826(00)00182-6
https://doi.org/10.1016/s1364-6826(00)00182-6