Proceedings with Extended Abstracts (single PDF file) - Radio ...

ResultsTemperature climatology• summary of the temperatures from all 25 FS flights (Lübken and Müllemann, 2002)• temperatures are very low (1)• in the lower and higher altitudes possibly some uncertainty in the model/temperaturedata• if saturation S>1 then only in about two-thirds of all cases PMSE detection temperatures can be low enough for ice particles but still no PMSE is presentbecause other processes, such as the creation of small scale fluctuations in the plasma,are missing (Lübken et al., 2002)• there is no apparent correlation between the magnitude of the degree of saturation andthe PMSE strength• in figure 1 an example of simultaneous PMSE observations and temperature measurementson 20 August is shown• the upper panel displays PMSE (up to 35 dB signal to noise ratio) from one hourbefore to one hour after a rocket launch (ROFS15) for temperature measurementsusing “falling spheres”• Lower panels show the close agreement between the height ranges of averaged PMSEoccurrence and super-saturation (left hand panel: profiles of PMSE and S)• temperature profile T ROFS (violet solid line in the right hand panel) crosses thefrostpoint-curve T FROST (blue dashed line) nearly at the boundary of the PMSE layer• atmospheric temperatures are lower than T FROST (gray shaded band) almost in theentire PMSE height range (colored shaded band)143