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  • 1
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    The NASA B-757 HIRF Test Series: Flight Test Results (1997)
    In:  CASI
    Details
    Publication Date: 2018-06-02
    Description: In 1995, the NASA Langley Research Center conducted a series of aircraft tests aimed at characterizing the electromagnetic environment (EME) in and around a Boeing 757 airliner. Measurements were made of the electromagnetic energy coupled into the aircraft and the signals induced on select structures as the aircraft was flown past known RF transmitters. These measurements were conducted to provide data for the validation of computational techniques for the assessment of electromagnetic effects in commercial transport aircraft. This paper reports on the results of flight tests using RF radiators in the HF, VHF, and UHF ranges and on efforts to use computational and analytical techniques to predict RF field levels inside the airliner at these frequencies.
    Keywords: Aircraft Design, Testing and Performance
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Investigation of Cloud Properties and Atmospheric Profiles with MODIS (1997)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The WINter Cloud Experiment (WINCE) was directed and supported by personnel from the University of Wisconsin in January and February. Data sets of good quality were collected by the MODIS Airborne Simulator (MAS) and other instruments on the NASA ER2; they will be used to develop and validate cloud detection and cloud property retrievals over winter scenes (especially over snow). Software development focused on utilities needed for all of the UW product executables; preparations for Version 2 software deliveries were almost completed. A significant effort was made, in cooperation with SBRS and MCST, in characterizing and understanding MODIS PFM thermal infrared performance; crosstalk in the longwave infrared channels continues to get considerable attention.
    Keywords: Meteorology and Climatology
    Type: NASA-CR-205072 , NAS 1.26:205072
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    NASA TECHNICAL REPORTS
  • 3
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    Assessing the Geomorphic Evolution and Hydrographic Changes Induced by Winter Storms along the Louisiana Coast (1998)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: The influence that cold front passages have on Louisiana coastal environments, including land loss and land building processes, has been the primary topic of this multidisciplinary research. This research has combined meteorological, remote sensing, and coastal expertise from the University of Wisconsin (UW) and Louisiana State University (LSU). Analyzed data sets include remotely sensed radiometric data (AVHRR on NOAA-12,13,14, Multispectral Atmospheric Mapping Sensor (MAMS) and MODIS Airborne Simulator (MAS) on NASA ER-2), U.S. Army Corps of Engineers (USACE) water level data, water quality data from the Coastal Studies Institute (CSI) at LSU, USACE river discharge data, National Weather Service (NWS) and CSI wind in sitzi measurements, geomorphic measurements from aerial photography (NASA ER-2 and Learjet), and CSI ground based sediment burial pipes (for monitoring topographic change along the Louisiana coast) and sediment cores. The work reported here-in is a continuation of an initial investigation into coastal Louisiana landform modification by cold front systems. That initial effort demonstrated the importance of cold front winds in the Atchafalaya Bay sediment plume distribution (Moeller et al.), documented the sediment transport and deposition process of the western Louisiana coast (Huh et al.) and developed tools (e.g. water types identification, suspended solids estimation) from multispectral radiometric data for application to the current study. This study has extended that work, developing a Geomorphic Impact Index (GI(sup 2)) for relating atmospheric forcing to coastal response and new tools to measure water motion and sediment transport.
    Keywords: Meteorology and Climatology
    Type: NASA/CR-97-207006 , NAS 1.26:207006
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    NASA TECHNICAL REPORTS
  • 4
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    Investigation of Cloud Properties and Atmospheric Profiles with Modis (1997)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A major milestone was accomplished with the delivery of all five University of Wisconsin MODIS Level 2 science production software packages to the Science Data Support Team (SDST) for integration. These deliveries were the culmination of months of design and testing, with most of the work focused on tasks peripheral to the actual science contained in the code. LTW hosted a MODIS infrared calibration workshop in September. Considerable progress has been made by MCST, with help from LTW, in refining the calibration algorithm, and in identifying and characterization outstanding problems. Work continues on characterizing the effects of non-blackbody earth surfaces on atmospheric profile retrievals and modeling radiative transfer through cirrus clouds.
    Keywords: Meteorology and Climatology
    Type: NASA/CR-97-206771 , NAS 1.26:206771
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Investigation of cloud properties and atmospheric stability with MODIS (1996)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The last half year was spent in preparing Version 1 software for delivery, and culminated in transfer of the Level 2 cloud mask production software to the SDST in April. A simulated MODIS test data set with good radiometric integrity was produced using MAS data for a clear ocean scene. ER-2 flight support and MAS data processing were provided by CIMSS personnel during the Apr-May 96 SUCCESS field campaign in Salina, Kansas. Improvements have been made in the absolute calibration of the MAS, including better characterization of the spectral response for all 50 channels. Plans were laid out for validating and testing the MODIS calibration techniques; these plans were further refined during a UW calibration meeting with MCST.
    Keywords: Meteorology and Climatology
    Type: NASA-CR-201800 , NAS 1.26:201800
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Cruise Report Poseidon 229a/b Kolbeinsey Ridge, Akureyri - Reykjavik, 22.05.1997 - 11.06.1997 (1997)
    Geologisch-Paläontologisches Institut und Museum, Christian-Albrechts-Universität
    In:  Geologisch-Paläontologisches Institut und Museum, Christian-Albrechts-Universität , Kiel, Deutschland, 42, 8 pp.
    Details
    Publication Date: 2018-03-22
    Description: General Subject of research: Detailed study of the shallow water hydrothermal system around Kolbeinsey and Grimsey islands
    Type: Report , NonPeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 7
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    Hydrothermalismus am Hook Ridge: Erste Untersuchungen an submarinen Hot Vents der Bransfieldstraße, Antarktis (1999)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 15 . pp. 19-22.
    Details
    Publication Date: 2017-03-14
    Type: Article , NonPeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 8
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    The Foundation Seamount chain: a first survey and sampling (1997)
    Elsevier
    In:  Marine Geology, 137 (3-4). pp. 191-200.
    Details
    Publication Date: 2017-06-23
    Description: The Foundation Seamounts form a 1400 km-long chain on the Pacific plate from 32 °S, 127 °W to the Pacific-Antarctic spreading axis at 38 °S, 111 °W. Previously only known from sparse single-beam echosoundings and satellite altimetry, we present here the first multibeam bathymetric survey and geological sampling results. We confirm that the submarine topography correlates with the altimetry, and that the chain is volcanic rather than tectonic or microcontinental in origin. The chain can be divided up morphologically and geochemically into three section: (1) west of 125 °W large flat-topped volcanoes composed of incompatible-element depleted lavas ( ≈ 1) of a near-ridge origin with little or no plume influence, (2) between 125 and 115 °W true intraplate volcanoes with incompatible element enrichment ( 〉 1.9) generated over the Foundation plume, (3) east of 115 °W E-W-trending volcanic ridges with compositions ( 2.0-0.3) suggestive of interaction between the plume and the Pacific-Antarctic spreading axis. On the spreading axis moderate incompatible element enrichments ( ≈0.8, cf. ≈ 0.3 outside the Foundation area) also suggest plume influence. It appears that the activity of the Foundation plume in the last few million years has (1) significantly waned and (2) become wholly channeled towards the spreading axis. The Foundation plume may be in the process of “dying”.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 9
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    Tackling the Challenge of Extracting Microplastics from Soils: A Protocol to Purify Soil Samples for Spectroscopic Analysis (2021)
    Details
    Publication Date: 2021-07-21
    Description: Microplastic pollution in soils is an emerging topic in the scientific community, with researchers striving to determine the occurrence and the impact of microplastics on soil health, ecology, and functionality. However, information on the microplastic contamination of soils is limited because of a lack of suitable analytical methods. Because micro‐Fourier‐transform infrared spectroscopy (µ‐FTIR), next to Raman spectroscopy, is one of the few methods that allows the determination of the number, polymer type, shape, and size of microplastic particles, the present study addresses the challenge of purifying soil samples sufficiently to allow a subsequent µ‐FTIR analysis. A combination of freeze‐drying, sieving, density separation, and a sequential enzymatic‐oxidative digestion protocol enables removal of the mineral mass (〉99.9% dry wt) and an average reduction of 77% dry weight of the remaining organic fraction. In addition to visual integrity, attenuated total reflectance FTIR, gel permeation chromatography, and differential scanning calorimetry showed that polyamide, polyethylene, polyethylene terephthalate, and polyvinyl chloride in the size range of 100 to 400 µm were not affected by the approach. However, biodegradable polylactic acid showed visible signs of degradation and reduced molecular weight distribution after protease treatment. Nevertheless, the presented purification protocol is a reliable and robust method to purify relatively large soil samples of approximately 250 g dry weight for spectroscopic analysis in microplastic research and has been shown to recover various microplastic fibers and fragments down to a size of 10 µm from natural soil samples. Environ Toxicol Chem 2021;00:1–14. © 2021 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
    Description: A novel purification sequence for natural soil samples undergoing microplastic analysis. image
    Description: Ministry for Environment, Climate Protection and Energy of Baden Württemberg
    Description: German Federal Ministry of Education and Research (BMBF) http://dx.doi.org/10.13039/501100002347
    Description: German Research Foundation (DFG) http://dx.doi.org/10.13039/501100001659
    Keywords: 363.7 ; Microplastics ; Soil contamination ; Analytical chemistry ; Purification protocol ; Enzymatic‐oxidative digestion ; µ‐FTIR
    Type: article
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    CITATION GEO-LEO
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