Results 61 to 70 of about 333,204 (200)
Method and apparatus for contour mapping using synthetic aperture radar [PDF]
, 1985 By using two SAR antennas spaced a known distance, B, and oriented at substantially the same look angle to illuminate the same target area, pixel data from the two antennas may be compared in phase to determine a difference delta phi from which a slant ...
Caro, E. R., Goldstein, R. M., Wu, C.
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Mapping surgical coordinates of the sphenopalatine foramen : surgical navigation study [PDF]
, 2009 Aims to identify measurements that may help intra operative localisation of the sphenopalatine foramen. The study used three dimensional surgical navigation software to study radiological anatomy, in order to define the distances and angulations between ...
C Douglas +8 more
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BiomimeticsIn proceeding with the advanced development of small unmanned aerial vehicles (UAVs), which are small flying machines, understanding the flight of insects is important because UAVs that use flight are attracting attention.
Masato Yoshida, Tomohiro Fukui
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Spectral characteristics of earth-space paths at 2 and 30 FHz [PDF]
Spectral characteristics of 2 and 30 GHz signals received from the Applications Technology Satellite-6 (ATS-6) are analyzed in detail at elevation angles ranging from 0 deg to 44 deg.
Baxter, R. A., Hodge, D. B.
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Preliminary design study of a high resolution meteor radar [PDF]
A design study for a high resolution meteor radar system is carried out with the objective of measuring upper atmospheric winds and particularly studying short period atmospheric waves in the 80 to 120 km altitude region.
Geller, M. A., Lee, W.
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Energization pf polar-cusp electrons at the noon meridian [PDF]
Observations gained with an electrostatic analyzer on board the low altitude, polar orbiting Aeriel 4 satellite demonstrate that the directional, differential spectra of polar-cusp electron intensities are regulated by the sign of the interplanetary ...
Craven, J. D., Frank, L. A.
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A motion-decomposition approach to address gimbal lock in the 3-cylinder open chain mechanism description of a joint coordinate system at the glenohumeral joint [PDF]
, 2010 In this study, the standard-sequence properties of a joint coordinate system were implemented for the glenohumeral joint by the use of a set of instantaneous geometrical planes.
Amadi, HO, Bull, AMJ
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An improved empirical model for diversity gain on Earth-space propagation paths [PDF]
An empirical model was generated to estimate diversity gain on Earth-space propagation paths as a function of Earth terminal separation distance, link frequency, elevation angle, and angle between the baseline and the path azimuth.
Hodge, D. B.
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, 2003 Mirror facets of the H.E.S.S. imaging atmospheric Cherenkov telescopes are aligned using stars imaged onto the closed lid of the PMT camera, viewed by a CCD camera.
Beilicke, M. +18 more
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Error analysis and corrections to pupil diameter measurements with Langley Research Center's oculometer [PDF]
Factors that can affect oculometer measurements of pupil diameter are: horizontal (azimuth) and vertical (elevation) viewing angle of the pilot; refraction of the eye and cornea; changes in distance of eye to camera; illumination intensity of light on ...
Fulton, C. L., Harris, R. L., Jr.
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