Comparisons between Canadian prairie MF radars, FPI (green and OH lines) and UARS HRDI systems

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dc.contributor.author Manson, A. H. en_US
dc.contributor.author Garbe, G. en_US
dc.contributor.author Burrage, M. D. en_US
dc.contributor.author Meek, C. E. en_US
dc.contributor.author Cogger, L. L. en_US
dc.date.accessioned 2006-09-11T19:28:26Z
dc.date.available 2006-09-11T19:28:26Z
dc.date.issued 1997-10 en_US
dc.identifier.citation Meek, C. E.; Manson, A. H.; Burrage, M. D.; Garbe, G.; Cogger, L. L.; (1997). "Comparisons between Canadian prairie MF radars, FPI (green and OH lines) and UARS HRDI systems." Annales Geophysicae 15(9): 1099-1110. <http://hdl.handle.net/2027.42/47858> en_US
dc.identifier.issn 1432-0576 en_US
dc.identifier.issn 0992-7689 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/47858
dc.description.abstract Detailed comparisons have been completed between the MF radars (MFR) in the Canadian prairies and three other systems: two ground-based Fabry-Perot interferometers (FPI) and the UARS high resolution Doppler imager (HRDI) system. The radars were at Sylvan Lake (52°N, 114°W), Robsart (49°N, 109°W) and the main continuing facility is at Saskatoon (52°N, 107°W). Statistical comparisons of hourly mean winds (1988–1992) for the Saskatoon MFR and FPI (557.7 nm green line) using scatter plots, wind speed-ratios, and direction-difference histograms show excellent agreement for Saskatoon. No serious biases in speeds or directions occur at the height of best agreement, 98 km. If anything, the MFR speeds appear bigger. The same applies to the Sylvan Lake MFR and Calgary FPI, where the best height is 88 km. In both cases these are close to the preferred heights for the emission layers. Differences between measurements seen on individual days are likely related to the influence of gravity waves (GW) upon the optical and radar systems, each of which have inherent spatial averaging (350, 50 km respectively), as well as the spatial difference between the nominal measurement locations. For HRDI, similar statistical comparisons are made, using single-overpass satellite winds and hourly means (to improve data quality) from MFR. Heights of best agreement, based upon direction-difference histograms, are shown; there is a tendency, beginning near 87 km, for these MFR heights to be 2 or 3 km greater than the HRDI heights. Speeds at these heights are typically larger for the satellite (MFR/HRDI = 0.7-0.8). Reasons for the differences are investigated. It is shown that the estimated errors and short-term (90 min) differences are larger for HRDI than for the MFR, indicating more noise or GW contamination. This leads to modest but significant differences in median speed-ratio (MFR/HRDI < 1). Also, comparison of the two systems is made under conditions when they agree best and when they show large disagreement. For the latter cases both systems show higher relative errors, and the HRDI vectors are frequently small. It is suggested that spatial or temporal GW wind fluctuations are the likely cause of the larger HRDI-MFR disagreement when wind speeds are small. No satisfactory explanation exists for the overall discrepancy is speeds between the MFR and HRDI. en_US
dc.format.extent 1328896 bytes
dc.format.extent 3115 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language.iso en_US
dc.publisher Springer-Verlag; Springer-Verlag Berlin Heidelberg en_US
dc.subject.other Astrophysics en_US
dc.subject.other Geosciences en_US
dc.subject.other Geophysics/Geodesy en_US
dc.subject.other Astronomy en_US
dc.subject.other Extraterrestrial Physics, Space Sciences en_US
dc.title Comparisons between Canadian prairie MF radars, FPI (green and OH lines) and UARS HRDI systems en_US
dc.type Original articles en_US
dc.subject.hlbsecondlevel Physics en_US
dc.subject.hlbsecondlevel Atmospheric, Oceanic and Space Sciences en_US
dc.subject.hlbtoplevel Science en_US
dc.description.peerreviewed Peer Reviewed en_US
dc.contributor.affiliationum Space Physics Research Lab., University of Michigan, Ann Arbor, MI, 41809, USA en_US
dc.contributor.affiliationother Department of Physics and Astronomy, University of Calgary, Calgary, Canada, T2N 1N4 en_US
dc.contributor.affiliationother Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada, S7N 5E2 en_US
dc.contributor.affiliationother Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada, S7N 5E2 en_US
dc.contributor.affiliationother Department of Physics and Astronomy, University of Calgary, Calgary, Canada, T2N 1N4 en_US
dc.contributor.affiliationumcampus Ann Arbor en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/47858/1/585_1997_Article_70151099.pdf en_US
dc.identifier.doi http://dx.doi.org/10.1007/s00585-997-1099-6 en_US
dc.identifier.source Annales Geophysicae en_US
dc.owningcollname Interdisciplinary and Peer-Reviewed
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