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  • 1
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    The Airborne Ocean Color Imager - System description and image processing (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Airborne Ocean Color Imager was developed as an aircraft instrument to simulate the spectral and radiometric characteristics of the next generation of satellite ocean color instrumentation. Data processing programs have been developed as extensions of the Coastal Zone Color Scanner algorithms for atmospheric correction and bio-optical output products. The latter include several bio-optical algorithms for estimating phytoplankton pigment concentration, as well as one for the diffuse attenuation coefficient of the water. Additional programs have been developed to geolocate these products and remap them into a georeferenced data base, using data from the aircraft's inertial navigation system. Examples illustrate the sequential data products generated by the processing system, using data from flightlines near the mouth of the Mississippi River: from raw data to atmospherically corrected data, to bio-optical data, to geolocated data, and, finally, to georeferenced data.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Journal of Imaging Science and Technology (ISSN 8750-9237); 36; 5; p. 423-430.
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  • 2
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    First earthshine photography from lunar orbit, part S (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The first photographs of the moon taken with earthshine illumination by the Apollo 15 crew were examined. Emphasis in the analysis was placed on a comparison of predicted exposures and obtained exposures. The results of the investigation indicate the following: (1) The predicted exposure of the maria areas and the obtained exposures were in reasonably close agreement. (2) The apparent-albedo values obtained for the floor of Aristarchus Crater are seven times greater than those for the maria.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 7 p
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  • 3
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    Near-terminator photography, part R (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The advantages resulting from the use of near-terminator photography in lunar surface investigations are discussed. It is pointed out that, under near-terminator conditions, small changes in slope produce greater contrast changes than at high sun elevation angles. This desirable phenomenon is confirmed by an examination of the near-terminator photography taken during the Apollo 15 mission. Many of the photographs obtained show lunar surface areas within a few degrees of the terminator and are therefore of significant geologic interest. In addition, many geologic features stand out in a distinct manner not normal in conventional lunar photography, thus providing additional data on the surface morphology and the configuration of a large number of lunar surface structures.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 6 p
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  • 4
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    Near-terminator and earthshine photography (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Photographic results obtained during the Apollo 17 flight for the near terminator and earthshine conditions are discussed. Lunar surface photographs taken in the vicinity of the sunshine terminator provide important information that is not obtained on photographs taken at higher sun evaluation angles. Earthshine photography also provides data on low relief, crater morphology, and small scale structures. Examples of photographs of the lunar surface taken under both conditions are provided.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 7 p
    Format: text
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  • 5
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    A near-real-time full-parallax holographic display for remote operations (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: A near real-time, full parallax holographic display system was developed that has the potential to provide a 3-D display for remote handling operations in hazardous environments. The major components of the system consist of a stack of three spatial light modulators which serves as the object source of the hologram; a near real-time holographic recording material (such as thermoplastic and photopolymer); and an optical system for relaying SLM images to the holographic recording material and to the observer for viewing.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington, Technology 2001: The Second National Technology Transfer Conference and Exposition, Volume 1; p 128-136
    Format: application/pdf
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  • 6
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    Selection of representative instruments for a global change technology architecture trade study (1991)
    In:  Other Sources
    Details
    Publication Date: 2013-08-29
    Description: The objectives of Task 2 of the Global Change Technology Initiative (GCTI) Architectural Trade Study were to select representative sets of instruments for making the science measurements specified in Task 1 and to identify instruments that, when flown together, form special complementary packages for measurement purposes. The list of representative instruments and their complementary relationships provide a payload manifest defined in terms of mass, power, size, viewing angles, data rates, etc. which can be used to focus spacecraft trade studies and the definition of a candidate GCTI fleet. Science requirements from Task 1 are given in tabular form. Numerous instruments are described, including visible-infrared radiometers, visible-infrared spectrometers, gas correction radiometers, active systems for Earth observation, Limb viewing instruments, visible-infrared and grating spectrometers, and microwave radiometers.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Global Change Technology Architecture Trade Study; p 109-179
    Format: text
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  • 7
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    CCDs at Lick Observatory (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Improved sensitivity to light and uniformity of response has been obtained using various surface treatments of thinned CCDs. Procedures are described and some results are shown. The Lick Observatory data acquisition system is briefly described. A new thermoelectrically-cooled CCD camera for telescope guiding has been designed and built. The camera is described and preliminary results at the telescope are given.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 8
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    Acoustic emission frequency discrimination (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: In acoustic emission nondestructive testing, broadband frequency noise is distinguished from narrow banded acoustic emission signals, since the latter are valid events indicative of structural flaws in the material being examined. This is accomplished by separating out those signals which contain frequency components both within and beyond (either above or below) the range of valid acoustic emission events. Application to acoustic emission monitoring during nondestructive bond verification and proof loading of undensified tiles on the Space Shuttle Orbiter is considered.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
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  • 9
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    First Earthshine photography from lunar orbit (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: During Apollo 15, fifteen photographs of the moon were taken under Earthshine illumination. These were the first Earthshine photographs taken from lunar orbit. The photographs are of photometric interest, particularly as they involve double reflection of sunlight: by the earth, then the moon, prior to photographic exposure. Certain published data on the mean illumination of the moon by the crescent earth predicted lower exposure values than obtained for each measured area. The apparent albedo values obtained for the floor of the crater Aristarchus were anomalously higher than those obtained for the surrounding maria.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-124752 , TM-71-2015-10 , CASE-340
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  • 10
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    Gravity gradient preliminary investigations on exhibit ''A'' Final report (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Quartz microbalance gravity gradiometer performance tests
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-101867 , GO-REPT-9
    Format: application/pdf
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