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  • 93.30.Hf  (3)
  • 42.65  (1)
  • 42.68.Rp  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Initial spring temperature profiles of the mesopause region over Fort Collins, CO, measured by the Colorado State Na temperature lidar (1992)
    Springer
    Applied physics 55 (1992), S. 149-153 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.68.Ay ; 94.10.Dy ; 93.30.Hf
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract After its first measurement in late August, 1989, the new Na temperature lidar has been in operation during springs 1990 and 1991 at Fort Collins, CO. A total of nine nights (over 2600 profiles) of mesopause temperature measurements, each for a period longer than 4 hours, have been taken. We present these high quality initial profiles which demonstrate the effectiveness of the new two-frequency narrowband lidar technique for mesopause temperature measurements. The average temperature profiles suggest that the spring mesopause temperatures range from 168 K to 205 K. The mesopause heights are around 88 km before the midnight and around 99 km after the midnight. The nightly averaged temperature profiles in the mesopause region display considerable variability. The richness in new geophysical information obtainable with a Na temperature lidar is made evident by noting strong perturbations in a short time scale (15 min) in the data taken on March 11, 1990 and March 18, 1991.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00324066
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    High-spectral-resolution rayleigh-mie lidar measurement of vertical aerosol and atmospheric profiles (1992)
    Springer
    Applied physics 55 (1992), S. 154-158 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.68.Ay ; 94.10.D ; 92.60.Mt ; 93.30.Hf
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new two-channel ground-based high-spectral-resolution Rayleigh-Mie lidar and its operation is described. Upon the inversion of data collected during the night of August 14–15, 1990, with this unique lidar system (553.7 nm), vertical profiles of atmospheric parameters including temperature, potential temperature, pressure and density, as well as aerosol parameters including backscatter-ratio, extinction coefficient and backscatter phase function are determined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00324067
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Arrival of Pinatubo disturbances in the stratospheric aerosol layer over Fort Collins, CO, observed by a lidar at 589 nm (1992)
    Springer
    Applied physics 55 (1992), S. 159-163 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.68.Ay ; 42.68.Ge ; 92.60.Mt ; 93.30.Hf
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using the Colorado State Na Lidar, surges of stratospheric aerosols caused by the eruption of Mt. Pinatubo have been observed from August to December 1991 over Fort Collins, CO (40.6° N, 105° W), showing a clear increasing trend in stratospheric aerosol activities. These aerosol layers are characterized by the backscatter-ratio profile at 589 nm for altitudes from 12 km to 40 km.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00324068
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 4
    Digitale Medien
    Digitale Medien
    Proposal for the measuring molecular velocity vector with single-pulse coherent Raman spectroscopy (1983)
    Springer
    Applied physics 32 (1983), S. 49-52 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.60 ; 42.65
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Methods for simultaneous measurements of more than one flow velocity component using coherent Raman spectroscopy are proposed. It is demonstrated that using a kilowatt broad-band probe pulse (3–30 GHz) along with a megawatt narrow-band pump pulse (∼100 MHz), coherent Raman signal resulting from a single laser pulse is sufficient to produce a high-resolution Raman spectrum for a velocity measurement.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688776
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 5
    Digitale Medien
    Digitale Medien
    Photon-burst correlation techniques for atmospheric crosswind measurements (1984)
    Springer
    Applied physics 33 (1984), S. 195-204 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 06.30.Gv ; 42.20.Cc ; 42.68.Rp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract With a cw visible laser, the method of photon-burst correlation is used measure atmospheric crosswinds. A scaling law, including the effects of atmospheric turbulence, for performance evaluation of both laser Doppler (LDV) and laser time-of-flight (LTV) velocimeters, is introduced theoretically and established experimentally with field experiments. Crosswind measurements in the night at a range of 500 m with a low-power argon-ion laser are reported. The measured signal particle arrival rate is consistent with the predicted arrival rate based on the scaling law. In addition to the use of higher laser power, it is suggested that with proper inclusion of signal photon bursts resulting from the simultaneous arrival of several particles, routine operation of this type of laser velocimeter for long ranges, up to 1000m, should be feasible.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00697328
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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