Most records begin in the late 1950s, and a few in 1947 or 1948. Coverage is relatively uniform, except in the Greenland interior.
Documentation is available on disk, on-line, and as hard copy.
In situ meteorological sounding archives for arctic studies. Serreze, M. C., J. D. Kahl, and S. Shiotani. The Historical Arctic Rawinsonde Archive documentation manual. National Snow and Ice Data Center, University of Colorado.