Zobrazeno 1 - 10
of 15
pro vyhledávání: '"D. J. Sandford"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 21, Pp 10273-10289 (2010)
Zonal and meridional winds have been measured in the upper mesosphere and lower thermosphere at polar latitudes using two ground-based meteor radars. One radar is located at Rothera (68° S, 68° W) in the Antarctic and has been operational since Feb
Externí odkaz:
https://doaj.org/article/e83a0ae5e74847cc9a9d8936b2edabb9
Publikováno v:
Annales Geophysicae, Vol 27, Pp 2831-2841 (2009)
Results are presented of a study of the temporal and spatial variability in meteor count rate observations from three VHF meteor radars. These radar are located in the Arctic (at Esrange, 68° N), in the Antarctic (at Rothera, 68° S) and near the
Externí odkaz:
https://doaj.org/article/a4a9adb4237f4f61a85681477750329e
Publikováno v:
Atmospheric Chemistry and Physics, Vol 8, Iss 3, Pp 749-755 (2008)
Recent observations of the polar mesosphere have revealed that waves with periods near two days reach significant amplitudes in both summer and winter. This is in striking contrast to mid-latitude observations where two-day waves maximise in summer o
Externí odkaz:
https://doaj.org/article/65729dbe084d412685c85727bbe4c528
Autor:
D. J. Sandford, N. J. Mitchell
Publikováno v:
Annales Geophysicae, Vol 25, Pp 9-12 (2007)
A meteor radar has been used to measure the horizontal winds in the equatorial mesosphere and lower thermosphere over Ascension Island (8.0° S, 14.4° W). A 5-year data set covering the interval 2001–2005 over the height range 78–100 km is co
Externí odkaz:
https://doaj.org/article/a7e95fa98f1f4414b1c7ade6c3b23ebb
Publikováno v:
Atmospheric Chemistry and Physics, Vol 6, Iss 12, Pp 4117-4127 (2006)
Meteor radars have been used to measure the horizontal winds in the mesosphere and lower thermosphere over Castle Eaton (52° N) in the UK and over Esrange (68° N) in Arctic Sweden. We consider a 16-year data set covering the interval 1988–2004 fo
Externí odkaz:
https://doaj.org/article/86077c209da9448595fcde5c81329612
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 21, Pp 10273-10289 (2010)
Sandford, D J, Beldon, C L, Hibbins, R E & Mitchell, N J 2010, ' Dynamics of the Antarctic and Arctic mesosphere and lower thermosphere-Part 1: Mean winds ', Atmospheric Chemistry & Physics, vol. 10, no. 21, pp. 10273-10289 . https://doi.org/10.5194/acp-10-10273-2010
Sandford, D J, Beldon, C L, Hibbins, R E & Mitchell, N J 2010, ' Dynamics of the Antarctic and Arctic mesosphere and lower thermosphere-Part 1: Mean winds ', Atmospheric Chemistry & Physics, vol. 10, no. 21, pp. 10273-10289 . https://doi.org/10.5194/acp-10-10273-2010
Zonal and meridional winds have been measured in the upper mesosphere and lower thermosphere at polar latitudes using two ground-based meteor radars. One radar is located at Rothera (68° S, 68° W) in the Antarctic and has been operational since Feb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c583a7b010355ce48aea812cda3ae46
https://doi.org/10.5194/acp-10-10273-2010
https://doi.org/10.5194/acp-10-10273-2010
Publikováno v:
Annales Geophysicae, Vol 27, Iss 7, Pp 2831-2841 (2009)
Annales Geophysicae, Vol 27, Pp 2831-2841 (2009)
Annales Geophysicae, Vol 27, Pp 2831-2841 (2009)
Results are presented of a study of the temporal and spatial variability in meteor count rate observations from three VHF meteor radars. These radar are located in the Arctic (at Esrange, 68° N), in the Antarctic (at Rothera, 68° S) and near the Eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fb2bdd3a1ba1a731078baedba4a57ad
https://doi.org/10.5194/angeo-27-2831-2009
https://doi.org/10.5194/angeo-27-2831-2009
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 69:2219-2237
Horizontal winds in the mesosphere and lower thermosphere over the Antarctic have been measured by a meteor radar at Rothera (67.5°S, 68.0°W) and MF radar at Davis (68.6°S, 78.0°E). Data from Rothera recorded over a 20-month interval in 2005-2006
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ee08effcd63fb22756f2d6b7e34937b
https://doi.org/10.1016/j.jastp.2007.04.010
https://doi.org/10.1016/j.jastp.2007.04.010
Publikováno v:
Radiation Protection Dosimetry. 85:159-162
The body TLD Service provided by the UK National Radiological Protection Board supplies dosemeters to some 5000 employers in various occupations, primarily in the industrial, research and medical sectors, covering some 45,000 persons. The service has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66f0ea7b5148408fbcec24d067dcbc82
https://doi.org/10.1093/oxfordjournals.rpd.a032825
https://doi.org/10.1093/oxfordjournals.rpd.a032825
Autor:
D. J. Sandford, D. K. Perkins, J. C. Dutt, D. C. Rose, J. D. Hessey, D. T. Bartlett, P. J. Gilvin, J. D. Steele
Publikováno v:
Radiation Protection Dosimetry. 66:33-36
Changes being made in a large scale body TLD personal monitoring system, reading a total of about 500,000 dosemeters a year, are reported. The system is based on wrapped 'plates' carrying two LiF/PTFE discs, and holds calibration factors for every di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d85b910679d29e2987829789b9e26df3
https://doi.org/10.1093/oxfordjournals.rpd.a031746
https://doi.org/10.1093/oxfordjournals.rpd.a031746