... The time taken to read through a quadrant on the array sets a fundamental limit on the fastest electron collection rate which can be achieved by resetting all the pixels. An inherent consequence of the methods of operating the NICMOS array detectors in the ACCUM, MULTIACCUM, and RAMP modes is therefore that there is a minimum possible exposure time, ~ 0.6 seconds (0.302 for MULTIACCUM), set by the time required to read the array. ... Figure 15.1 illustrates the operation of bright object mode. ...

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T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

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• C/2006 P1 (McNaught)

The best possible protection for personnel is elimination of the hazard. ... Wherever the hazard cannot be eliminated, and there is reasonable risk to hazard exposure, personnel are required to use the proper protective equipment. ... Refer to Section 13 , titled ?Eye and Face Protection?) ... For example, rubber insulation gloves are required to protect against electrical shock wherever work is done on high voltage power equipment. ... Refer to Figure 12.1 , titled ?Use of Protective Equipment?) ...

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• Spectrographic time budget
• Procedure to Install the 2.5m Secondary Truss
• Procedure to Remove 2.5m Wind Baffle

Next: Radiation Hardness Up: CCD Scientific Performance Previous: Dark current and cooling . The full frame mode of operation is widely used for optical astronomy in order to obtain the greatest focal plane coverage. In X-ray astronomy this mode has a disadvantage in that for the relatively shorter image integrations required to maintain a photon counting mode, smearing of the images occurs during readout when the photons continue to fall on the moving charge pattern. ...

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• Comments
• Correction of the energy scale in specific pixels
• Method

Next: What was the Up: Observational data Previous: Observational data . A certain minimum set of data is required to make observations reducible. These are the identity of the object measured; the identity of the bandpass in which the measurement was made; the time of the observation; and, for integration-type measurements, the duration of the integration. Table describes the basic table-file columns in detail. ... What was measured? ... Mon Jan 22 15:08:15 MET 1996 ...

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• CCD Detectors
• Introduction
• Nonlinearity

... Maps of 21cm emission are dominated by warm H i, and most observations of H i absorption against continuum sources are limited to discrete points. ... Current Results At right are maps of H i emission, HISA, and 12 CO emission in the eastern 25% of the survey, given as projections along the velocity (Figure 1) and latitude (Figure 2) axes. ... 2000, A. J., submitted Figure 1: H i Survey Map (`; b): H i 21cm brightness integrated over all velocity channels; white is bright and black is faint. ...

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• HISA Poster for the 195th Meeting of the AAS, January, 2000
• Arecibo Planetary Radar Implementation Tasks
• The Pleiades

... This paper presents an overview of the CENTERFIT image centering algorithm library currently under development in the IRAF system. ... The centering algorithms employed by these applications must satisfy a wide range of efficiency and accuracy requirements, and function robustly on data sets spanning a broad wavelength, resolution, and signal-to-noise regime. This paper presents an overview of CENTERFIT, a library of 1-D and 2-D centering algorithms currently under development in the IRAF system. ...

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• A New PROS Task for Calculating HRI Source Intensities or Upper Limits
• ADASS 2003 Conference Proceedings
• The Chandra Automatic Processing/Archive Interface

The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The following are astronauts who are employed at NASA. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Astronaut . ... Acaba, Joseph M. 2004 . ... Aunon, Serena M. 2009 . ... Barratt, Michael R. 2000 . ... Burbank, Daniel C. 1996 . ... Cassada, Josh A. 2013 . ... 1998 . ...

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• NASA - Astronaut Biographies
• Astronaut Bio: Steven L. Smith (12/2013)
• Management Astronauts

NGC OPTICAL SOFTWARE Claudio Cumani NGC Presentation - 2008, July 16 Differences btw IR and OPT detector controllers: intrinsic 2 "Exposure" handling Optical Rigid scheme for exposures (wipe - integrate - ["move charges on detector while integrating"] - read ). Active intervention of the control-server during the exposure is ti ti th th required (application of new voltages in each state). ... Starting an exposure = starting transfer and storage of data. ...

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• modhead
• QC Procedure: DFOS operations under VNC
• ngasClient

... Have you ever seen the night sky change? ... IC 1396: Emission Nebula in Cepheus . ... Energized by the bright, bluish central star seen here, this star forming region sprawls across hundreds of light-years -- spanning over three degrees on the sky while nearly 3,000 light-years from planet Earth. The Bubble Nebula . ... South Pole Star Trails . ... Curiosity Before Mars: Seven Minutes of Terror . ... Ash and Lightning Above an Icelandic Volcano . ... Trails in the Morning Sky . ...

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In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Astronomy HyperText Book: Fusion Sequences in Stars
• The Galaxy Gallery Page 6: Comparative Morphology
• Thermodynamics

OptInt PmWiki : Pm Wiki / Access Keys . ... On Windows with Internet Explorer, press ALT + the access key. With Firefox, press SHIFT + ALT + the access key. ... Example: <a href="http://example.com" accesskey="x">Example</a> would create a link to example.com that could be triggered by clicking on the linked word "example" or using the access key Akey+x. That same action key link could be created in PmWiki markup by typing %accesskey="x"%[[http://example.com|Example]]%% , like this: Example . ...