TY - JOUR
T1 - Mesospheric wind studies during AIDA Act '89
T2 - morphology and comparison of various techniques
AU - Turek, R. S.
AU - Miller, K. L.
AU - Roper, R. G.
AU - Brosnahan, J. W.
N1 - Funding Information:
Acknowledyements--This research has been supported by the U.S. Air Force Office of Scientific Research under contracts F49620-J-93-0193 and F49620-93-1-0460, and the National Science Foundation under Grant #ATM-9216653. We acknowledge the contributions of the late Dr Gene Adams, without whose scientific acumen, insight and perseverance there would be no IDI technique. We are indebted to Dr C. O. Hines for identifying a problem associated with our initial interpretation of Fig. 6, and to Dr Michael P. Sulzer, of the Arecibo Observatory, for providing us with the ISR data. The Arecibo Observatory is operated by Cornell University under National Science Foundation sponsorship.
PY - 1995/9
Y1 - 1995/9
N2 - The Arecibo Initiative in Dynamics of the Atmosphere (AIDA) '89 was a multi-instrument campaign designed to compare various mesospheric wind measurement techniques. Our emphasis here is the comparison of the incoherent scatter radar (ISR) measurements with those of a 3.175 MHz radar operating a s an imaging Doppler interferometer (1131). We have performed further analyses in order to justify the interpretation of the long term IDI measurements in terms of prevailing winds and tides. Initial comparison of 14 profiles by Hines et al., 1993, J. atmos. terr. Phys. 55, 241-288, showed good agreement between the ISR and IDI measurements up to about 80 km, with fair to poor agreement above that altitude. We have compiled statistics from 208 profiles which show that the prevailing wind and diurnal and semidiurnal tides deduced from the IDI data provide a background wind about which both the IDI and ISR winds are normally distributed over the height range from 70 to 97 km. The 3.175 MHz radar data have also been processed using an interferometry (INT) technique [Van Baelen and Richmond 1991, Radio Sts. 26, 1209-1218] and two spaced antenna (SA) techniques [Meek, 1980, J. atmos. terr. Phys. 42, 837-839; Briggs. 1984, MAP Handbook, Vol. 13, pp. 166-186] to determine the three dimensional wind vector. These are then compared with the IDI results. Tidal amplitudes and phases were calculated using the generalized analysis of Groves, 1959, S. atmos. terr. Phys. 16, 344-356, historically used on meteor wind radar data. Results show a predominance of the diurnal S11 tidal mode in the altitude range 70-110 km, reaching a maximum amplitude 45 ms-1 at 95 km, with semidiurnal amplitudes being about 10-15 ms-1 throughout the height range considered. There is evidence of the two day wave in data from 86-120 km, with amplitudes on the order of 20 ms-1.
AB - The Arecibo Initiative in Dynamics of the Atmosphere (AIDA) '89 was a multi-instrument campaign designed to compare various mesospheric wind measurement techniques. Our emphasis here is the comparison of the incoherent scatter radar (ISR) measurements with those of a 3.175 MHz radar operating a s an imaging Doppler interferometer (1131). We have performed further analyses in order to justify the interpretation of the long term IDI measurements in terms of prevailing winds and tides. Initial comparison of 14 profiles by Hines et al., 1993, J. atmos. terr. Phys. 55, 241-288, showed good agreement between the ISR and IDI measurements up to about 80 km, with fair to poor agreement above that altitude. We have compiled statistics from 208 profiles which show that the prevailing wind and diurnal and semidiurnal tides deduced from the IDI data provide a background wind about which both the IDI and ISR winds are normally distributed over the height range from 70 to 97 km. The 3.175 MHz radar data have also been processed using an interferometry (INT) technique [Van Baelen and Richmond 1991, Radio Sts. 26, 1209-1218] and two spaced antenna (SA) techniques [Meek, 1980, J. atmos. terr. Phys. 42, 837-839; Briggs. 1984, MAP Handbook, Vol. 13, pp. 166-186] to determine the three dimensional wind vector. These are then compared with the IDI results. Tidal amplitudes and phases were calculated using the generalized analysis of Groves, 1959, S. atmos. terr. Phys. 16, 344-356, historically used on meteor wind radar data. Results show a predominance of the diurnal S11 tidal mode in the altitude range 70-110 km, reaching a maximum amplitude 45 ms-1 at 95 km, with semidiurnal amplitudes being about 10-15 ms-1 throughout the height range considered. There is evidence of the two day wave in data from 86-120 km, with amplitudes on the order of 20 ms-1.
UR - http://www.scopus.com/inward/record.url?scp=0029413761&partnerID=8YFLogxK
U2 - 10.1016/0021-9169(94)00118-8
DO - 10.1016/0021-9169(94)00118-8
M3 - Article
AN - SCOPUS:0029413761
SN - 0021-9169
VL - 57
SP - 1321
EP - 1343
JO - Journal of Atmospheric and Terrestrial Physics
JF - Journal of Atmospheric and Terrestrial Physics
IS - 11
ER -