Röttger, J. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Chu, Y. H., Chao, J. K., Liu, C. H., & Röttger, J. (1990). Aspect sensitivity at tropospheric heights measured with vertically pointed beam of the Chung-Li VHF radar. Radio Science, 25, 539-550.