The 28th Soviet Antarctic Expedition was an expedition to Antarctica undertaken by the Soviet Union and the German Democratic Republic.
Although the GDR could not build a research station as a result of not having signed the Antarctic Treaty, it operated a research station near the Soviet Novolazarevskaya station.
In 1983, six Germans joined the 28th Soviet Antarctic Expedition' to research meteorology, physics of the upper atmosphere, geology and geophysics.
References
28th Soviet Antarctic Expedition Wikipedia(Text) CC BY-SA