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| Titel |
A comparison between mesospheric wind measurements made near Christchurch (44°S, 173°E) using the high resolution doppler imager (HRDI) and a medium frequency (MF) radar |
| VerfasserIn |
D. J. Frame, B. N. Lawrence, G. J. Fraser, M. D. Burrage |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 18, no. 5 ; Nr. 18, no. 5, S.555-565 |
| Datensatznummer |
250013989
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| Publikation (Nr.) |
 copernicus.org/angeo-18-555-2000.pdf |
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| Zusammenfassung |
We report on the comparison of winds measured
by a medium frequency (MF) radar near Christchurch, New Zealand, and by the high
resolution doppler imager (HRDI). Previous comparisons have demonstrated that
there can be significant differences in the winds obtained by the two
techniques, and our results are no different. However, these data show
relatively good agreement in the meridional direction, but large differences in
the zonal direction, where the radar is regularly measuring the zonal wind as
too easterly. To do the comparison, overpasses from the satellite must be
obtained when it is close to the radar site. The radar data are averaged in time
around the overpass because we know the radars sample phenomena which have
spatial and temporal scales which make them invisible to HRDI. There are a
limited number of overpass comparisons which limit our confidence in these
results, but a detailed analysis of these data show that the proximity of the
overpass is often an important factor in the differences obtained. Other factors
examined include the influence of the local time of the overpass, and the amount
of radar data averaged around the overpass time.
Key words: Atmospheric composition and structure
(instruments and techniques) · Meteorology and atmospheric dynamics (middle
atmosphere dynamics; instruments and techniques) |
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