Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere
[From Introduction, p. 2] The first chapter of this thesis deals with an analysis of F2 critical frequency data first for SANAE and then for eleven other Antarctic and sub-Antarctic stations covering the period 1957 to 1969. This shows certain aspects of the F2 behaviour. Some of the results of this...
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ftrhodesunivcory:vital:5548 2023-05-15T14:00:57+02:00 Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere Williams, Morgan Howard 1972 471 leaves pdf http://hdl.handle.net/10962/d1013459 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:5548 English eng Rhodes University Faculty of Science, Physics vital:5548 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:5548 http://hdl.handle.net/10962/d1013459 Williams, Morgan Howard Harmonic analysis Ionosphere -- Antarctic Ocean Thesis Doctoral PhD 1972 ftrhodesunivcory 2022-12-26T11:59:40Z [From Introduction, p. 2] The first chapter of this thesis deals with an analysis of F2 critical frequency data first for SANAE and then for eleven other Antarctic and sub-Antarctic stations covering the period 1957 to 1969. This shows certain aspects of the F2 behaviour. Some of the results of this chapter have been reported in a paper by Gledhill and Williams. The two most important mechanisms thought to be responsible for the Antarctic f₀F2 behaviour are incoming corpuscular radiation and horizontal neutral winds. These two mechanisms together with two others (the temperature theory of Torr and Torr and the semi-annual variation of neutral atmospheric density) are discussed in detail in part 2 (Chapters 2 to 4) with a view to discovering which aspects of the f₀F2 behaviour over Antarctica can be explained by each theory. An attempt is made in Part 3 (Chapters 5 and 6) to explain the observed behaviour by solving the continuity equation of the ionosphere for high-latitude stations. Finally, besides the critical frequency, another parameter of importance in explaining the behaviour in the F2 region is the height at which the F2 maximum occurs. This quantity cannot be read directly from an ionogram and it is not an easy quantity to determine. In fact the way in which it is usually obtained is by "scaling" the ionogram in question and converting the virtual heights obtained into real heights. In Part 4 (Chapter 7 and 8) an outline is given of the two computer programs which were written to perform this conversion. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Ocean Antarctica Rhodes University Cory: Repository Antarctic Antarctic Ocean SANAE ENVELOPE(-2.850,-2.850,-71.667,-71.667) The Antarctic |
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Open Polar |
collection |
Rhodes University Cory: Repository |
op_collection_id |
ftrhodesunivcory |
language |
English |
topic |
Harmonic analysis Ionosphere -- Antarctic Ocean |
spellingShingle |
Harmonic analysis Ionosphere -- Antarctic Ocean Williams, Morgan Howard Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
topic_facet |
Harmonic analysis Ionosphere -- Antarctic Ocean |
description |
[From Introduction, p. 2] The first chapter of this thesis deals with an analysis of F2 critical frequency data first for SANAE and then for eleven other Antarctic and sub-Antarctic stations covering the period 1957 to 1969. This shows certain aspects of the F2 behaviour. Some of the results of this chapter have been reported in a paper by Gledhill and Williams. The two most important mechanisms thought to be responsible for the Antarctic f₀F2 behaviour are incoming corpuscular radiation and horizontal neutral winds. These two mechanisms together with two others (the temperature theory of Torr and Torr and the semi-annual variation of neutral atmospheric density) are discussed in detail in part 2 (Chapters 2 to 4) with a view to discovering which aspects of the f₀F2 behaviour over Antarctica can be explained by each theory. An attempt is made in Part 3 (Chapters 5 and 6) to explain the observed behaviour by solving the continuity equation of the ionosphere for high-latitude stations. Finally, besides the critical frequency, another parameter of importance in explaining the behaviour in the F2 region is the height at which the F2 maximum occurs. This quantity cannot be read directly from an ionogram and it is not an easy quantity to determine. In fact the way in which it is usually obtained is by "scaling" the ionogram in question and converting the virtual heights obtained into real heights. In Part 4 (Chapter 7 and 8) an outline is given of the two computer programs which were written to perform this conversion. |
format |
Doctoral or Postdoctoral Thesis |
author |
Williams, Morgan Howard |
author_facet |
Williams, Morgan Howard |
author_sort |
Williams, Morgan Howard |
title |
Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
title_short |
Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
title_full |
Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
title_fullStr |
Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
title_full_unstemmed |
Diurnal and seasonal variations of the F2 region of the Antarctic ionosphere |
title_sort |
diurnal and seasonal variations of the f2 region of the antarctic ionosphere |
publisher |
Rhodes University |
publishDate |
1972 |
url |
http://hdl.handle.net/10962/d1013459 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:5548 |
long_lat |
ENVELOPE(-2.850,-2.850,-71.667,-71.667) |
geographic |
Antarctic Antarctic Ocean SANAE The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean SANAE The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica |
op_relation |
vital:5548 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:5548 http://hdl.handle.net/10962/d1013459 |
op_rights |
Williams, Morgan Howard |
_version_ |
1766270343851278336 |