@Article{AbduKantBatiPaul:1985:ImVeSh,
               author = "Abdu, Mangalahyil Ali and Kantor, Ivan Jelinek and Batista, Inez 
                         Staciarini and Paula, Eurico Rodrigues de",
                title = "East-west plasma bubble irregularity motion determined from spaced 
                         VHF polarimeters: Implications on velocity shear in the zonal F 
                         region bulk plasma motion",
              journal = "Radio Science",
                 year = "1985",
               volume = "20",
               number = "1",
                pages = "111--122",
                month = "Jan./Feb.",
             keywords = "AERONOMIA.",
             abstract = "VHF electronic polarimeters were used to monitor Faraday rotation 
                         angle and amplitude of geostationary satellite (GOES 3)beacon 
                         signals, simultaneously at two stations, Cachoeira Paulista 
                         (22§41'S, 45§W)and Sao Jos6 dos Campos (23§12'S, 45§55'W), 
                         separated by 110 km exactly in the magnetic east-west direction in 
                         Brazil. The analysis of the data for a few months in the 1981-1982 
                         period, carried out in this paper, shows TEC fluctuations 
                         correlated with range type spread F events in the local ionograms 
                         and amplitudes scintillation in the satellite beacon signals, 
                         thereby identifying themselves as plasma bubbles and associated 
                         structures in the equatorial ionosphere. The spaced polarimeter 
                         system has permitted determination of the east-west velocities of 
                         these plasma bubble structures whose nighttime variation pattern 
                         is in excellent agreement with those of the eastward bulk plasma 
                         measured by Jicamarca radar and with those of the plasma bubble 
                         irregularities obtained from different radio and optical 
                         measurements carried out in the equatorial and low-latitude 
                         regions. There exist, however, significant differences in the 
                         magnitude of the velocities in the different measurements, our 
                         results over low-latitude locations showing highest values of all. 
                         These differences are interpreted as suggesting the possibility of 
                         a latitudinal variation in the plasma zonal velocities, consistent 
                         with the already known existence of vertical shears in the bulk 
                         plasma zonal flow over the equator.",
                 issn = "0048-6604 and 1944-799X",
                label = "2378",
           targetfile = "INPE-2745.pdf",
        urlaccessdate = "01 maio 2024"
}