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  • 1
    Publikationsdatum: 2013-08-31
    Beschreibung: In late 1989, a personal computer (PC)-based data evaluation workstation was developed to support post flight processing of Multispectral Atmospheric Mapping Sensor (MAMS) data. The MAMS Quick View System (QVS) is an image analysis and display system designed to provide the capability to evaluate Daedalus scanner data immediately after an aircraft flight. Even in its original form, the QVS offered the portability of a personal computer with the advanced analysis and display features of a mainframe image analysis system. It was recognized, however, that the original QVS had its limitations, both in speed and processing of MAMS data. Recent efforts are presented that focus on overcoming earlier limitations and adapting the system to a new data tape structure. In doing so, the enhanced Quick View System (QVS2) will accommodate data from any of the four spectrometers used with the Daedalus scanner on the NASA ER2 platform. The QVS2 is designed around the AST 486/33 MHz CPU personal computer and comes with 10 EISA expansion slots, keyboard, and 4.0 mbytes of memory. Specialized PC-McIDAS software provides the main image analysis and display capability for the system. Image analysis and display of the digital scanner data is accomplished with PC-McIDAS software.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: NASA, Washington, 4th Airborne Geoscience Workshop; p 183-184
    Format: application/pdf
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  • 2
    Publikationsdatum: 2013-08-31
    Beschreibung: Past studies of passive microwave measurements of precipitating systems have yielded broad empirical relationships between hydrometeors and microwave transmission. In general, these relationships fall into two categories of passive microwave precipitation retrievals rely upon the observed effect of liquid precipitation to increase the brightness temperature of a radiometrically cold background such as an ocean surface. A scattering-based method is based upon the effect that frozen hydrometeors tend to decrease the brightness temperature of a radiometrically warm background such as land. One step toward developing quantitative brightness temperature-rain rate relationships is the recent construction of a new aircraft instrument sponsored by National Aeronautics and Space Administration/Marshall Space Flight Center (NASA/MSFC). This instrument is the Advanced Microwave Precipitation Radiometer (AMPR) designed and built by Georgia Tech Research Institute to fly aboard high altitude research aircraft such as the NASA ER-2. The AMPR and its accompanying data acquisition system are mounted in the Q-bay compartment of the NASA ER-2.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: NASA, Washington, 4th Airborne Geoscience Workshop; p 179-180
    Format: application/pdf
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  • 3
    Publikationsdatum: 2019-06-28
    Beschreibung: The Multispectral Atmospheric Mapping Sensor (MAMS) is an airborne instrument being investigated as part of NASA's high altitude research program. Findings from work on this and other instruments have been important as the scientific justification of new instrumentation for the Earth Observing System (EOS). This report discusses changes to the instrument which have led to new capabilities, improved data quality, and more accurate calibration methods. In order to provide a summary of the data collected with MAMS, a complete list of flight dates and locations is provided. For many applications, registration of MAMS imagery with landmarks is required. The navigation of this data on the Man-computer Interactive Data Access System (McIDAS) is discussed. Finally, research applications of the data are discussed and specific examples are presented to show the applicability of these measurements to NASA's Earth System Science (ESS) objectives.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: NASA-TM-100352 , NAS 1.15:100352
    Format: application/pdf
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  • 4
    Publikationsdatum: 2019-07-19
    Beschreibung: The Hurricane Imaging Radiometer (HIRAD) is a new airborne passive microwave synthetic aperture radiometer designed to provide wide swath images of ocean surface wind speed under heavy precipitation and, in particular, in tropical cyclones. It operates at 4, 5, 6 and 6.6 GHz and uses interferometric signal processing to synthesize a pushbroom imager in software from a low profile planar antenna with no mechanical scanning. HIRAD participated in NASA s Genesis and Rapid Intensification Processes (GRIP) mission during Fall 2010 as its first science field campaign. HIRAD produced images of upwelling brightness temperature over a aprox 70 km swath width with approx 3 km spatial resolution. From this, ocean surface wind speed and column averaged atmospheric liquid water content can be retrieved across the swath. The calibration and image reconstruction algorithms that were used to verify HIRAD functional performance during and immediately after GRIP were only preliminary and used a number of simplifying assumptions and approximations about the instrument design and performance. The development and performance of a more detailed and complete set of algorithms are reported here.
    Schlagwort(e): Instrumentation and Photography
    Materialart: M12-1543 , 32nd Annual International Geoscience & Remote Sensing Symposium (IGARSS); Jul 22, 2012 - Jul 27, 2012; Munich; Germany
    Format: application/pdf
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  • 5
    Publikationsdatum: 2019-07-13
    Beschreibung: No abstract available
    Schlagwort(e): Meteorology and Climatology
    Materialart: M14-3553 , HS3/HSRP Science Team Meeting; Apr 29, 2014 - May 01, 2014; Moffett Field, CA; United States
    Format: application/pdf
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  • 6
    Publikationsdatum: 2019-07-13
    Beschreibung: No abstract available
    Schlagwort(e): Meteorology and Climatology; Instrumentation and Photography
    Materialart: M14-3552 , Conference on Hurricanes and Tropical Meteorology; Mar 30, 2014 - Apr 04, 2014; San Diego, CA; United States
    Format: application/pdf
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  • 7
    Publikationsdatum: 2019-07-13
    Beschreibung: No abstract available
    Schlagwort(e): Meteorology and Climatology; Instrumentation and Photography
    Materialart: M14-3336 , American Meteorological Society (AMS) Annual Meeting; Feb 02, 2014 - Feb 06, 2014; Atlanta, GA; United States
    Format: application/pdf
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  • 8
    Publikationsdatum: 2019-07-12
    Beschreibung: The Hurricane Imaging Radiometer (HIRAD) is a synthetic thinned array passive microwave radiometer designed to allow retrieval of surface wind speed in hurricanes, up through category five intensity. The retrieval technology follows the Stepped Frequency Microwave Radiometer (SFMR), which measures surface wind speed in hurricanes along a narrow strip beneath the aircraft. HIRAD has flown in the NASA Genesis and Rapid Intensification Processes (GRIP) experiement in 2010 on a WB-57 aircraft, and on a Global Hawk unmanned aircraft system (UAS) in 2012 and 2013 as part of NASA's Hurricane and Severe Storms Sentinel (HS3) program. The GRIP program included flights over Hurricanes Earl and Karl (2010). The 2012 HS3 deployment did not include any hurricane flights for the UAS carrying HIRAD. Hurricane flights are expected for HIRAD in 2013 during HS3. This presentation will describe the HIRAD instrument, its results from the 2010 hurricane flights, and hopefully results from hurricane flights in August and September 2013.
    Schlagwort(e): Meteorology and Climatology
    Materialart: M13-2943 , American Meteorological Society (AMS) Annual Meeting; Atlanta, GA; United States
    Format: application/pdf
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  • 9
    Publikationsdatum: 2019-07-13
    Beschreibung: The performance characteristic of a digital correlation radiometer signal processing back end (DBE) is analyzed using a simulator. The particular design studied here corresponds to the airborne Hurricane Imaging radiometer which was jointly developed by the NASA Marshall Space Flight Center, University of Michigan, University of Central Florida and NOAA. Laboratory and flight test data is found to be in accord with the simulation results. Overall design seems to be optimum for the typical input signal dynamic range. It was found that the performance of the digital kurtosis could be improved by lowering the DBE input power level. An unusual scaling between digital correlation channels observed in the instrument data is confirmed to be a DBE characteristic.
    Schlagwort(e): Meteorology and Climatology; Computer Programming and Software
    Materialart: MSFC-E-DAA-TN38568 , 2017 IEEE International Geoscience and Remote Sensing Symposium; Jul 23, 2017 - Jul 28, 2017; Forth Worth, TX; United States
    Format: application/pdf
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  • 10
    Publikationsdatum: 2019-07-13
    Beschreibung: No abstract available
    Schlagwort(e): Geosciences (General)
    Materialart: MSFC-E-DAA-TN43388 , International Geoscience and Remote Sensing Symposium (IGARSS); Jul 23, 2017 - Jul 28, 2017; Fort Worth, TX; United States
    Format: application/pdf
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