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Two-Camera Acquisition and Tracking of a Flying Target
new!
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Date added: 08/01/2008 |
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The objective of this technology is to use a sensor with a wide field of view such as a fish-eye lens to locate an object anywhere in the sky that is emitting light and moving. Once it is located, its coordinates are sent to a tracking device such as a two-axis gimbal with a
narrow field of view sensor. The tracking device acquires the object and then can track its position with high accuracy. |
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Rotationally Vibrating Electric-Field Mill
new!
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Date added: 08/01/2008 |
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Of the various ways to measure dc electric fields in air, the rotating split-electrode field mill is the best because it can be made isolated (and immune to both self charge and atmospheric ions) and it can be made as a closed structure (and immune to the ingress of water and dust). A vibrating version of the rotating split-electrode field mill retains all the advantages of the original concept, while overcoming all the disadvantages of the type. |
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Prism Window for Optical Alignment
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Date added: 07/01/2008 |
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A prism window has been devised for use with and autocollimator in aligning optical components that are (1) required to be oriented parallel to each other and/or at a specified angle of incidence with respect to a common optical path and (2) mounted at different positions along the common optical path. |
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Ground Facility for Vicarious Calibration of Skyborne Sensors
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Date added: 07/01/2008 |
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This document presents various aspects for vicarious radiometric calibration of airborne and spaceborne sensors of visible and infrared radiation. The methodology reported is used in place of laboratory calibration. |
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Range-Gated Metrology With Compact Optical Head
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Date added: 07/01/2008 |
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This technology will enable cost-effective
"metrology webs," in which tens or hundreds of measurement beams are deployed to monitor the dimensional stability of an instrument or structure with subnanometer accuracy and minimal footprint. |
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Miniature Incandescent Lamps as Fiber- Optic Light Sources
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Date added: 07/01/2008 |
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The invention consists of an incandescent lamp of tiny dimensions and method of fabricating. The package is closed with a transparent window normally used for ultra-violet erasing of volatile electronic memories. |
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Bidirectional Pressure-Regulator System
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Date added: 07/01/2008 |
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The bidirectional pressure regulator is a flow control device that controls the flow and pressure of fluids
that are moving through it. The unique feature of this control is that it is capable of controlling the
pressure on either side of the control to a given setpoint at any given moment in time. The regulator works with gases and liquids.
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Gold-on-Polymer-Based Sensing Films for Detection of Organic and Inorganic Analytes in the Air
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Date added: 06/01/2008 |
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The novel gold-on-polymer sensors have been successfully operated and regenerated to detect organic solvents and Hg at ppm/ppb levels required by NASA. |
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Non-Destructive Evaluation of Materials Via Ultraviolet Spectroscopy
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Date added: 06/01/2008 |
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NASA's Vision for Space Exploration as well as the future of commercial and non-commercial aerospace
rests in the use of composite materials. Conventional methods for evaluating aircraft/spacecraft aging,
damage, and durability no longer will apply. This document discusses a novel application of an existing optical analysis method for evaluating composite materials and coatings currently in use or proposed for use in space and aerospace. |
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Lidar System for Airborne Measurements of Clouds And Aerosols
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Date added: 06/01/2008 |
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During 1999-2000 a new advanced cloud and aerosol lidar system, the Cloud Physics Lidar (CPL), was built for use on the high altitude NASA ER-2 aircraft. The CPL provides measurements at three wavelengths to permit a comprehensive study of cloud and aerosol properties. The CPL is designed around a high repetition rate, low pulse energy laser transmitter. |
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