Laboratory performance of the Keck Interferometer's nulling beam combiner
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Keck interferometer nulling beam combiner TPF↗
Engineering topics
Hardy, G.
Publications and source records attributed to Hardy, G..
Laboratory performance of the Keck interferometer nulling beam combiner
Now that regular visibility squared measurements are routinely achieved, mid-infrared nulling is the next observing mode to be implemented on the Keck Interferometer. This mode's main objective is the characterization of exo-zodiacal dust disks around nearby main sequence stars in support of the TPF space mission. Keck Nuller also shares numerious characteristics with an interferometric TPF, and will then serve as a technical precursor for this mission. We report here the results obtained in the laboratory with the KI mid-IR nulling beam combiner, which is based on a dual polarization Modified Mach Zender combiner and dispersion and achromatic nulling through zinc-selenide dielectric plates.
mid-infrared↗
Deep and stable interferometric nulling of broadband light with implications for observing planets around nearby stars
The number of indirectly detected planetary systems around nearby stars has grown tremendously since their initial discovery five years ago.
Planetary↗
Report from the Fall 1999 Embedded Systems Conference
This report contains a lot of technical content, but it also contains substantial amounts of information of interest to managers.
embedded system software↗
Nulling Interferometry: Working on the Dark Fringe
Deep nulling of both laser and thermal radiation has been demonstrated in the laboratory at visible wavelengths, by means of a rotational shearing interferometer (RSI) coupled to single-mode input and output fibers.
nulling interferometry fringe technical reports le↗
Development and validation of the crew-station system-integration research facility
The various issues associated with the use of integrated flight management systems in aircraft were discussed. To address these issues a fixed base integrated flight research (IFR) simulation of a helicopter was developed to support experiments that contribute to the understanding of design criteria for rotorcraft cockpits incorporating advanced integrated flight management systems. A validation experiment was conducted that demonstrates the main features of the facility and the capability to conduct crew/system integration research.
Nedell, B.↗
A summary of joint US-Canadian augmentor wing powered-lift STOL research programs at the Ames Research Center, NASA, 1975-1980
Several different flight research programs carried out by NASA and the Canadian Government using the Augmentor Wing Jet STOL Research Aircraft to investigate the design, operational, and systems requirements for powered-lift STOL aircraft are summarized. Some of these programs considered handling qualities and certification criteria for this class of aircraft, and addressed pilot control techniques, control system design, and improved cockpit displays for the powered-lift STOL approach configuration. Other programs involved exploiting the potential of STOL aircraft for constrained terminal-area approaches within the context of present or future air traffic control environments. Both manual and automatic flight control investigations are discussed, and an extensive bibliography of the flight programs is included.
Hindson, W. S.↗