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Significant technological advances were made toward utilizing the Hale telescope for receiving the faint laser communication signals transmitted from an optical transceiver on a spacecraft orbiting Mars. The so-called Palomar receive terminal design, which would have supported nominal downlink data rates of 1-30 Mbps, is described. Testing to validate technologies for near-Sun (3deg from edge of solar...
The mechanical behaviour and development of microstructure in tension of an Al-4.5% Mg alloy at temperatures from 450 to 570°C and strain rates from 10 −6 to 10 −2 s −1 has been investigated. High strain rate sensitivities, up to m = 0.7, but relatively small elongations, between 120 and 280%, were observed. A single activation energy for deformation, close to reported values...
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