IR arrays in space and on the ground

Article Abstract:

Astronomy facilities and equipment such as the Space Infrared Telescope Facility and the Near Infrared Camera and Multi-Object Spectrometer rely on infrared (IR) arrays. These are microelectric devices with individual detectors responsive to faint sources of radiation. IR arrays consist of an upper layer detecting IR radiation and storing photoelectrons and a bottom layer transforming the electrons into quantifiable electrical signals. Beneath the upper layer is an array of sensors. The IR detector is encased in either a camera or a spectrometer and integrated into an optical telescope.

Equipment and supplies, Infrared array detectors, Infrared antenna arrays, Infrared astronomy

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A simpler ride into space

Article Abstract:

The linear aerospike rocket engine configuration is considered to be the promising technology in the development of the single-stage-to-orbit launch vehicle. The engine configuration allows for the effective use of rocket thrust, without the accompanying dangers of gas overexpansion/underexpansion as evident in nozzle thrusters.

Design and construction, Rockets (Aeronautics), Rockets (Vehicles), Launch vehicles (Astronautics), Rocket engines, Rocket thrust, Rocket nozzles

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How Does the Ground Shake?

Article Abstract:

Predicting earthquake ground motions in a geological area with high-seismic risk is important in developing structures that resist earthquake damage. Predictions require detailed information about the source of the motion caused by the slip between opposite fault sides during the rupture process of the earthquake.

Research, Seismological research, Earthquake resistant design

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