Dr. Ch. Jacobi LIM Dr. D. Kuerschner Institute for Geophysics and Geology Collm Observatory Results from upper atmosphere wind measurements (52N, 15E) April 2000 ---------------------------------------------------------- Analyses using monthly median half-hourly winds T2z in UT Winds and amplitudes in m/s Frequency voz vom v2z T2z April 2000 Mean -7 -5 14 7.0 virtual height 94 km ---------------------------------------------------------- Results from daily analyses of wind parameters derived from mean wind values on 3 frequencies April 2000 Semidiurnal tidal phase in local mean time (LMT) = UT+1 Date voz vom v2z T2z h' 1./ 2. 4.00 -15.8 -11.3 10.9 6.9 95.0 2./ 3. 4.00 -6.0 -4.8 10.7 10.0 90.7 3./ 4. 4.00 -12.9 -3.5 10.2 8.4 92.5 4./ 5. 4.00 4.3 7.5 6.9 6.4 96.4 5./ 6. 4.00 -3.7 -6.4 10.0 9.0 91.9 6./ 7. 4.00 -15.2 -5.2 11.2 1.2 94.3 7./ 8. 4.00 1.3 -5.4 14.4 6.7 96.3 8./ 9. 4.00 -8.4 -13.2 14.7 8.6 93.9 9./10. 4.00 -7.6 -4.2 21.0 8.0 100.2 10./11. 4.00 -5.7 -8.2 17.4 9.0 94.8 11./12. 4.00 6.9 -3.7 12.6 8.9 92.5 12./13. 4.00 1.6 -10.6 6.2 8.3 92.8 13./14. 4.00 -6.8 -5.5 8.9 5.8 92.6 14./15. 4.00 -4.4 -6.1 15.6 6.9 92.8 15./16. 4.00 .6 15.4 6.9 8.6 93.6 16./17. 4.00 -14.8 -3.8 18.6 8.1 95.1 17./18. 4.00 -3.9 -2.4 23.5 8.1 93.9 18./19. 4.00 4.1 1.5 11.4 9.5 94.1 19./20. 4.00 -20.7 -3.4 18.8 8.3 93.3 20./21. 4.00 -27.6 -3.6 9.5 8.2 92.5 21./22. 4.00 -11.7 -7.2 22.2 7.8 94.8 22./23. 4.00 -5.5 -6.6 20.3 7.8 94.1 23./24. 4.00 -13.1 2.6 17.5 9.0 93.4 24./25. 4.00 -27.2 -3.5 10.6 8.7 94.2 25./26. 4.00 -11.8 -5.6 27.1 9.1 91.1 26./27. 4.00 -5.4 -2.7 19.6 6.7 90.2 27./28. 4.00 8.8 -3.0 10.6 5.7 98.3 28./29. 4.00 -9.6 -5.1 24.2 7.5 94.1 29./30. 4.00 .4 -4.2 17.9 6.1 93.6 30. 4./ 1. 5.00 -17.1 -9.8 19.4 7.5 94.4 ---------------------------------------------------------- Monthly median winds and heights - April 2000 Time vz vm N h' lower upper N (UT) quartiles .25 -19 -1 30 95 93 98 30 .75 -18 -3 30 95 92 97 30 1.25 -20 -2 30 95 92 97 30 1.75 -21 1 30 94 92 97 30 2.25 -22 -1 30 94 93 98 30 2.75 -22 0 30 95 93 99 30 3.25 -18 -1 30 96 92 100 30 3.75 -12 5 30 95 93 99 30 4.25 -14 7 30 95 91 96 30 4.75 -13 6 30 91 90 93 30 5.25 -25 5 30 89 88 91 30 5.75 -27 4 27 89 88 91 27 6.25 -11 16 12 88 87 89 12 6.75 - - 3 87 - - 2 8.75 - - 1 - - - 0 9.25 - - 1 - - - 0 10.25 - - 3 - - - 0 10.75 - - 1 - - - 0 12.25 - - 3 - - - 0 12.75 - - 3 - - - 0 13.25 - - 1 - - - 0 13.75 - - 1 - - - 0 14.25 - - 3 - - - 0 14.75 - - 4 - - - 0 15.25 - - 6 - - - 0 15.75 - - 6 - - - 0 16.25 5 3 9 87 84 90 4 16.75 9 4 21 89 88 91 16 17.25 4 2 30 90 89 92 26 17.75 17 -5 30 92 90 93 27 18.25 23 -5 30 93 90 94 28 18.75 19 -9 30 92 90 94 28 19.25 16 -9 30 91 90 95 27 19.75 13 -10 30 92 90 94 28 20.25 11 -13 30 91 89 94 27 20.75 3 -15 30 91 89 94 28 21.25 3 -15 30 92 90 95 30 21.75 -5 -20 30 93 90 95 30 22.25 -10 -13 30 93 92 96 29 22.75 -20 -12 30 95 90 98 30 23.25 -25 -9 30 95 92 97 30 23.75 -21 -8 30 95 93 97 30 Chaotic velocity 177 kHz Vc/V = 1.25 270 kHz Vc/V = 1.61 225 kHz Vc/V = 2.00 ---------------------------------------------------------- Vertical profiles of monthly mean wind parameters derived from mesosphere/lower thermosphere LF D1 measurements over Central Europe (52N, 15E) April 2000 h voz vom v2z T2z km m/s m/s m/s UT 82.5 -11 4 9 10.2 85.0 -10 1 7 8.8 87.5 -10 -2 9 7.7 90.0 -9 -4 11 7.2 92.5 -8 -5 13 6.9 95.0 -7 -6 13 6.8 97.5 -6 -6 13 6.7 100.0 -6 -6 11 6.7 102.5 -5 -5 8 6.7 Monthly mean values of calculated diurnal tidal wind components at 95 km Amplitude: 16 m/s Zonal Phase: 17.4 UT ---------------------------------------------------------- Collm Observatory Ionospheric SID on 60, 75, 162 and 252 kHz Date Time 60 75 162 252 Impor- (Begin) tance (1-3) 1. 4. 0 7.42 UT c x x 2 1. 4. 0 11.40 UT c x x x 2 2. 4. 0 8.39 UT c x x 1 3. 4. 0 11.06 UT c x x x 1 8. 4. 0 9.18 UT c x x x 1 8. 4. 0 9.40 UT c x x x 1 9. 4. 0 15.28 UT x x x x 1 10. 4. 0 9.57 UT x x x x 1 11. 4. 0 16.45 UT x x x x 1 12. 4. 0 12.11 UT x x x x 1 14. 4. 0 8.11 UT x x x x 1 15. 4. 0 7.59 UT x x x 1 15. 4. 0 10.13 UT x x x x 2 15. 4. 0 13.40 UT x x 1 15. 4. 0 14.40 UT x x x x 1 16. 4. 0 5.54 UT x x x x 1 18. 4. 0 8.02 UT x x x x 1 18. 4. 0 11.50 UT x x x x 1 18. 4. 0 13.21 UT x 1 18. 4. 0 14.12 UT x x 1 19. 4. 0 5.46 UT x x 1 19. 4. 0 6.32 UT x x 1 19. 4. 0 10.27 UT x x x x 1 19. 4. 0 11.39 UT x x 1 21. 4. 0 9.26 UT x x 1 21. 4. 0 17.55 UT x x x 1 22. 4. 0 5.53 UT x x x x 1 22. 4. 0 15.56 UT x x x 1 22. 4. 0 17.56 UT x 1 23. 4. 0 6.00 UT x x 1 23. 4. 0 13.49 UT x 1 25. 4. 0 9.23 UT x 1 25. 4. 0 10.41 UT x x x x 1 26. 4. 0 5.58 UT x x 1 26. 4. 0 7.41 UT x x x x 1 26. 4. 0 8.43 UT x x 1 26. 4. 0 9.05 UT x x 1 26. 4. 0 9.20 UT x x x x 1 26. 4. 0 12.44 UT x x 1 26. 4. 0 15.26 UT x x x 1 27. 4. 0 5.50 UT x x x 1 27. 4. 0 6.50 UT x x x 1 27. 4. 0 8.06 UT x x 1 29. 4. 0 5.27 UT x x 1 30. 4. 0 7.56 UT x x x 1