Documents / FOIA release
This is National Intelligence Estimate 11-5-61, Soviet Technical Capabilities in Guided Missiles and Space Vehicles. It was submitted by the Director of Central Intelligence and concurred in by the United States Intelligence Board on 25 April 1961. The estimate assesses Soviet surface-to-air, antimissile, air-to-air, air-to-surface, ballistic, ICBM, naval and space programs. It concludes that the first Soviet ICBM unit was probably operational around 1 January 1960. It also says there is no evidence the Soviets are developing offensive space weapons. It contains no UFO material.
Figure 10 -&EGRET 36' SPOON REST-ESTIMATED CHARACTERISTICS Frequency , About 155 mos 8eom Width - 6 degrees in azimuth Radiated Peak Power 375 kw Range 220 NM NOT TO SCALE DIM ENSIONS IN FEET SPOON REST ACQUISITION RADAR
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FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is above. 101 pages are in the text index: search them above, or from the library's search.