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THIRD REPORT ON REGULAR VHF IONOSPHERIC PROPAGATION OBSERVABLE OVER LONG DISTANCES

agency of a particular project or program. Published papers appear either in the Bureau's own series ... 1 DEPARTMENT OF THE ARMY WASHINGTON 25, D.C. ATTN: SIGCO 1 CHIEF SIGNAL OFFICER PLANS & PROGRAMS DIV ... Introduction- Scope of Report 1 2. The Program 1 2.1 Variations with Season, Geographical Position and Solar ...