Zobrazeno 1 - 10
of 23
pro vyhledávání: '"H.A. von Biel"'
Autor:
H.A. von Biel, J. Grant, D. N. Heuff, Bryan Lawrence, Roy G. Grainger, G. E. Plank, Grahame J. Fraser
We present a new method to determine mesospheric electron densities from partially reflected medium frequency radar pulses. The technique uses an optimal estimation inverse method and retrieves both an electron density profile and a gradient electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4622cb9afab6fbc7e4c7e2cf9bbbb702
https://doi.org/10.1016/j.jastp.2003.12.006
https://doi.org/10.1016/j.jastp.2003.12.006
Autor:
H.A. von Biel
Publikováno v:
Advances in Space Research. 24:1669-1677
A short review of the partial reflection experiment is presented along with the commonly made assumptions regarding the scattering mechanisms of the MF magneto-ionic modes in the mesosphere. It is shown that the traditional method of analysing differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65e65972e8a076e443fd53e65c44690f
https://doi.org/10.1016/s0273-1177(99)00329-4
https://doi.org/10.1016/s0273-1177(99)00329-4
Autor:
H.A. von Biel
Publikováno v:
Advances in Space Research. 16:91-98
The operating principles and the physical manifestation of a 2.9 MHz partial reflection programme at Scott Base, Antarctica, are described. Data from this programme have been collected, on an hourly basis, since 1982, and these data have revealed tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3e5cfff1480c1d441155e44b835c1a7
https://doi.org/10.1016/0273-1177(95)00176-f
https://doi.org/10.1016/0273-1177(95)00176-f
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 54:1523-1526
A data analysis procedure is described which effectively extracts the correlated part from the total electromagnetic field present in the plane of space orthogonal linearly polarised antennas. An example is given to demonstrate the effectiveness of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bb0df9fb929149ce3ab1d56dbb8e3c8
https://doi.org/10.1016/0021-9169(92)90159-i
https://doi.org/10.1016/0021-9169(92)90159-i
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 54:235-242
Results from a partial reflection radar experiment, operated at a frequency of 2.9 MHz at Scott Base, Antarctica, are presented for the time interval from January 1987 to June 1991. It is shown that a layer of ionisation can frequently be identified
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a900a75034d8d652e8441030db9b31e0
https://doi.org/10.1016/0021-9169(92)90004-5
https://doi.org/10.1016/0021-9169(92)90004-5
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 52:687-694
The concepts of geomagnetic time and position of a station on Earth are reviewed on the basis of the centred dipole, and the eccentric dipole, magnetic field approximations. Equations are presented from which the centred dipole coordinates can be com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5efebd772df28509a7259c9547837646
https://doi.org/10.1016/0021-9169(90)90001-4
https://doi.org/10.1016/0021-9169(90)90001-4
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 39:243-246
A technique is described which permits inversion of the differential absorption and phase integrals obtained from D-region partial reflection experiments. It is shown that when the electron density profile is assumed to be an n th order polynominal o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af4fb3056a74c9092df78c2ec841a192
https://doi.org/10.1016/0021-9169(77)90119-2
https://doi.org/10.1016/0021-9169(77)90119-2
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 39:769-778
A polarimeter is described with which all of the properties of an elliptically polarized electro-magnetic field may be measured. Relationships are developed for use of the polarimeter in connection with the D -region partial reflection experiment. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa2793a3e75f1189d7837e33f0cbbe30
https://doi.org/10.1016/0021-9169(77)90138-6
https://doi.org/10.1016/0021-9169(77)90138-6
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 43:225-230
An estimator is derived which depends only on the specular-to-scattered power ratio in a Rice distribution. It is shown how this estimator may be deduced from experimental amplitude distributions and how to assess the probable error associated with i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d7bd814cd2eaf3d74933f33271168e5
https://doi.org/10.1016/0021-9169(81)90043-x
https://doi.org/10.1016/0021-9169(81)90043-x
Autor:
H.A. von Biel
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 41:1201-1204
A method is presented for fitting experimental amplitude distribution data to the functional relationship C = 1- exp (− aR b ), where C is the probability that the amplitude is less than R . The constants of fit a and b are shown to be sufficient f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5eea5f23c46592572bdc242849bb28e
https://doi.org/10.1016/0021-9169(79)90023-0
https://doi.org/10.1016/0021-9169(79)90023-0