Engineering topics
Publications and source records attributed to Mahoney, M..
Airborne measurements of NO, total reactive nitrogen(NO(sub y)), O(sub 3), and condensation nuclei (CN) were made, together with other tracers such as CO and H(sub 2)O, within air traffic corridors over the U.S. and North Atlantic regions in October and November 1997.
Recent in situ measurements of the chemical composition of single aerosol particles at altitudes up to 19 km have revealed a number of surprising features about ambient particles. Upper tropospheric aerosols in the study region often contained more organic material than sulfate.
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Exploring the frequency range from a few tens of MHZ down to a few tens of kHz commonly requires multiple antennas operating as an aperture synthesis interferometer to obtain angular resolution. This design must overcome the corrupting effects of interplanetary scintillation, interfering signals and nearly isotropic antennas that see strong sources such as the Sun and Jupiter at all times.
The Precision Segmented Reflector program and the Submillimeter Imager and Line Survey mission are overviewed. The temperature requirements, thermal design and environment, as well as the on-orbit thermal performance of a 3.65-m-diameter passively-cooled submillimeter-wavelength telescope are discussed, and focus is placed on the geometric and thermal mathematical models employed in the study. Attention is given to an inflatable space-rigidized sunshade protecting the primary mirror thermally and the highly elliptical orbit chosen to reduce heat input from the earth. Primary-reflector temperature predictions are shown to indicate that a large spatial gradient can exist and the magnitude of the gradient is a strong function of the telescope pitch angle. It is suggested that the cryostat outer-shell temperature may be further lowered with the introduction of a rectangular shield between a solar array and the cryostat.
Visual presentation of motion and orientation of Orbiting Geophysical Observatory
Telemetry data processing plan for OGO-A MISSION - pulse code modulation digital and analog data techniques - ground data acquisition system
Data telemetering to Earth from EGO describing PCM system and special processor for magnetometer data