Mapping ionospheric backscatter measured by the SuperDARN HF radars – Part 1: A new empirical virtual height model
| Autor: | Gareth Chisham, Tim K. Yeoman, George J. Sofko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Backscatter Wave propagation Super Dual Auroral Radar Network 01 natural sciences law.invention law 0103 physical sciences Earth and Planetary Sciences (miscellaneous) Range (statistics) Radar lcsh:Science 010303 astronomy & astrophysics 0105 earth and related environmental sciences Remote sensing Scattering lcsh:QC801-809 Geology Astronomy and Astrophysics lcsh:QC1-999 Radio propagation lcsh:Geophysics. Cosmic physics Space and Planetary Science lcsh:Q Ionosphere lcsh:Physics |
| Zdroj: | Annales Geophysicae, Vol 26, Iss 4, Pp 823-841 (2008) Annales Geophysicae, Vol 26, Pp 823-841 (2008) |
| ISSN: | 1432-0576 0992-7689 |
| Popis: | Accurately mapping the location of ionospheric backscatter targets (density irregularities) identified by the Super Dual Auroral Radar Network (SuperDARN) HF radars can be a major problem, particularly at far ranges for which the radio propagation paths are longer and more uncertain. Assessing and increasing the accuracy of the mapping of scattering locations is crucial for the measurement of two-dimensional velocity structures on the small and meso-scale, for which overlapping velocity measurements from two radars need to be combined, and for studies in which SuperDARN data are used in conjunction with measurements from other instruments. The co-ordinates of scattering locations are presently estimated using a combination of the measured range and a model virtual height, assuming a straight line virtual propagation path. By studying elevation angle of arrival information of backscatterred signals from 5 years of data (1997–2001) from the Saskatoon SuperDARN radar we have determined the actual distribution of the backscatter target locations in range-virtual height space. This has allowed the derivation of a new empirical virtual height model that allows for a more accurate mapping of the locations of backscatter targets. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|