The purposes of the present report are to:

1. Compare the predictions made as to the levels of fallout anticipated in 1963 with the experience based on surveillance measurements.
2. Make more precise estimates of the levels anticipated in 1964 and 1965.,
3. Evaluate the validity of the prediction procedures when they are applied to a changing fallout situation such as now exists. The study is based on information available through June 1964.

• Federal Guidance Report No. 6: Revised Fallout Estimates for 1964-1965 and Verification of the 1963 Predictions (PDF)(32 pp, 604 K, October 1964)