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Page 7 - CA ; AND NICOLET, M. : Investigation of the Major Constituents of the April-May 1963 Heterosphere by the Explorer XVII Satellite.
Page 24 - Ariel n (UK-2/S-52) international ionosphere satellite are presented. The satellite was subjected to carbonarc solar simulation at 10' 6torr vacuum, with liquid-nitrogen shroud wall temperature. It was rotated at 3 rpm to simulate orbital spin and was tested at several attitudes relative to the incident solar energy. The major objectives of the test were to operate the spacecraft under simulated dynamic space conditions and to evaluate the spacecraft thermal design. The results verified the design...
Page 10 - A neutral surface separating anti-solar directed fields in the southern hemisphere from solar directed fields in the northern hemisphere has been detected over a large areal extent.
Page 6 - ... transmission by plane-parallel slabs are applied here to the diffusion of monoenergetic auroral electrons in the polar atmosphere. The following conclusions are reached: (1) The straggling effect is significant for electrons with energies above 20 kev, but is negligible below 10 kev. (2) Back-scattering decreases at both high and low energy levels, showing a maximum around 20 kev. The backscattering coefficient at the maximum level is on the order of 7% (intensity) and 4% (energy flux) for vertical...
Page 6 - DIFFUSION OF AURORAL ELECTRONS IN THE ATMOSPHERE by Kaichi Maeda Goddard Space Flight Center SUMMARY The results of a Monte Carlo computer program originally written by NBS to treat electron reflection and transmission by plane-parallel slabs are applied here to the diffusion of monoenergetic auroral electrons in the polar atmosphere. The following conclusions are reached: (1) The straggling effect is significant for electrons with energies above 20 kev, but is negligible below 10 kev. (2) Back-...
Page 6 - The back- scatter ing coefficient at the maximum level is on the order of 7% (intensity) and 4% (energy flux) for vertical incidence, and 20% and 15% respectively, for isotropic incidence. (3) Angular distribution of penetrating electrons approaches perfect diffusion with cosine- squared rather than Gaussian distribution around half of the penetration (backdiffusion) depth for both vertical and isotropic incident distribution. Also, previous calculations on penetration depth and effective depth of...
Page 9 - Earth is found to be approximately 40 Re. The direction of the field is parallel to the earth-sun line and in the anti-solar direction below the solar magnetospheric equatorial plane and in the solar direction above this plane. A neutral surface separating...
Page 21 - ... screening techniques. Results indicate that burn-in is superior to bake for every class of semi-conductor device and for every manufacturing process used in the fabrication of the devices. Correlation is shown between rated power dissipation and burn-in effectiveness. Statistical significance of the data is evaluated when comparability of types is possible, ie where the types were both burned-in and baked.

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