Fejer, J.A.Rinnert, K.Woodman Pollitt, Ronald Francisco2016-10-252017-12-212016-10-252017-12-211974Fejer, J. A., Rinnert, K., & Woodman, R. F. (1974). Beobachthung der Brillouin-Instabilitat in der Ionosphare.http://hdl.handle.net/20.500.12816/615Observations of weak stimulated Brillouin scattering with the 50 MHz incoherente scatter radar at Jicamarca are described. The non-linear interaction uf the upgoing radar wave with the downcoming waves, incoherently backscattered fromm greater heights, causes an asymmetry in the incoherent "ion" backscatter spectrum. For a given antenna aperture this asymmetry increases with increasing power and decreasing frequency of the rdar. The theoretically predicted effect was unambiguuosly verified, using 3 msec pulses and long integration time. Model calculations show good agreement with the observations.application/pdfdeinfo:eu-repo/semantics/openAccessSignal ProcessingIonosphereRadarinfo:eu-repo/semantics/workingPaperhttp://purl.org/pe-repo/ocde/ford#1.05.01