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  • Inorganic Chemistry  (349)
  • EARTH RESOURCES AND REMOTE SENSING  (290)
  • 1985-1989  (474)
  • 1950-1954  (7)
  • 1930-1934  (69)
  • 1915-1919  (40)
  • 1910-1914  (49)
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Year
  • 1
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    Analysis of multiple incidence angle SIR-B data for determining forest stand characteristics (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: For the first time in the U.S. space program, digital synthetic aperture radar (SR) data were obtained from different incidence angles during Space Shuttle Mission 41-G. Shuttle Imaging Radar-B (SIR-B) data were obtained at incidence angles of 58 deg., 45 deg., and 28 deg., on October 9, 10, and 11, 1984, respectively, for a predominantly forested study area in northern Florida. Cloud-free LANDSAT Thematic Mapper (T.M.) data were obtained over the same area on October 12. The SIR-B data were processed and then digitally registered to the LANDSAT T.M. data by scientists at the Jet Propulsion Laboratory. This is the only known digitally registered SIR-B and T.M. data set for which the data were obtained nearly simultaneously. The data analysis of this information is discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: JPL The Second Spaceborne Imaging Radar Symposium; p 159-164
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    LANDSAT-D investigations in snow hydrology (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Work undertaken during the contract and its results are described. Many of the results from this investigation are available in journal or conference proceedings literature - published, accepted for publication, or submitted for publication. For these the reference and the abstract are given. Those results that have not yet been submitted separately for publication are described in detail. Accomplishments during the contract period are summarized as follows: (1) analysis of the snow reflectance characteristics of the LANDSAT Thematic Mapper, including spectral suitability, dynamic range, and spectral resolution; (2) development of a variety of atmospheric models for use with LANDSAT Thematic Mapper data. These include a simple but fast two-stream approximation for inhomogeneous atmospheres over irregular surfaces, and a doubling model for calculation of the angular distribution of spectral radiance at any level in an plane-parallel atmosphere; (3) incorporation of digital elevation data into the atmospheric models and into the analysis of the satellite data; and (4) textural analysis of the spatial distribution of snow cover.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E86-10007 , NASA-CR-176379 , NAS 1.26:176379
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    MODIS information, data and control system (MIDACS) operations concepts (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data, and Control System (MIDACS) Operations Concepts Document provides a basis for the mutual understanding between the users and the designers of the MIDACS, including the requirements, operating environment, external interfaces, and development plan. In defining the concepts and scope of the system, how the MIDACS will operate as an element of the Earth Observing System (EOS) within the EosDIS environment is described. This version follows an earlier release of a preliminary draft version. The individual operations concepts for planning and scheduling, control and monitoring, data acquisition and processing, calibration and validation, data archive and distribution, and user access do not yet fully represent the requirements of the data system needed to achieve the scientific objectives of the MODIS instruments and science teams. The teams are not yet formed; however, it is possible to develop the operations concepts based on the present concept of EosDIS, the level 1 and level 2 Functional Requirements Documents, and through interviews and meetings with key members of the scientific community. The operations concepts were exercised through the application of representative scenarios.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100720 , REPT-89B00065 , NAS 1.15:100720
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    NASA TECHNICAL REPORTS
  • 4
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    MODIS information, data and control system (MIDACS) level 2 functional requirements (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data and Control System (MIDACS) Level 2 Functional Requirements Document establishes the functional requirements for MIDACS and provides a basis for the mutual understanding between the users and the designers of the EosDIS, including the requirements, operating environment, external interfaces, and development plan. In defining the requirements and scope of the system, this document describes how MIDACS will operate as an element of the EOS within the EosDIS environment. This version of the Level 2 Requirements Document follows an earlier release of a preliminary draft version. The sections on functional and performance requirements do not yet fully represent the requirements of the data system needed to achieve the scientific objectives of the MODIS instruments and science teams. Indeed, the team members have not yet been selected and the team has not yet been formed; however, it has been possible to identify many relevant requirements based on the present concept of EosDIS and through interviews and meetings with key members of the scientific community. These requirements have been grouped by functional component of the data system, and by function within each component. These requirements have been merged with the complete set of Level 1 and Level 2 context diagrams, data flow diagrams, and data dictionary.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100719 , REPT-89B00065 , NAS 1.15:100719
    Format: application/pdf
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  • 5
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    MODIS Information, Data, and Control System (MIDACS) system specifications and conceptual design (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data, and Control System (MIDACS) Specifications and Conceptual Design Document discusses system level requirements, the overall operating environment in which requirements must be met, and a breakdown of MIDACS into component subsystems, which include the Instrument Support Terminal, the Instrument Control Center, the Team Member Computing Facility, the Central Data Handling Facility, and the Data Archive and Distribution System. The specifications include sizing estimates for the processing and storage capacities of each data system element, as well as traffic analyses of data flows between the elements internally, and also externally across the data system interfaces. The specifications for the data system, as well as for the individual planning and scheduling, control and monitoring, data acquisition and processing, calibration and validation, and data archive and distribution components, do not yet fully specify the data system in the complete manner needed to achieve the scientific objectives of the MODIS instruments and science teams. The teams have not yet been formed; however, it was possible to develop the specifications and conceptual design based on the present concept of EosDIS, the Level-1 and Level-2 Functional Requirements Documents, the Operations Concept, and through interviews and meetings with key members of the scientific community.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100721 , REPT-89B00065 , NAS 1.15:100721
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Characterizing forest stands with multi-incidence angle and multi-polarized SAR data (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The potential for using HH-polarized L-band SAR data obtained at different incidence angles from satellite altitudes to identify and map different forest cover types and stand density classes is studied. Reasonably accurate results are obtained if the speckle characteristics of the data are suppressed by low-pass spatial filters and a contextual classification algorithm. Multipolarized L-band SAR data obtained from aircraft altitudes over the same test site are also analyzed to assess the relationships between polarization and forest stand characteristics. It is found that incidence angle controls, to a very large extent, the characteristics of the data and the type of information that can be obtained from L-band, HH-polarized satellite SAR data. Cross-polarization of L-band SAR data enhances and differentiates various forest stand characteristics which cannot be defined using only the like-polarized data, and vice-versa.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Advances in Space Research (ISSN 0273-1177); 7; 11 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
    Electronic Resource
    Electronic Resource
    Wechselseitige elektromagnetische Masse und die Struktur des Atoms (1916)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 95 (1916), S. 1-19 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Die Atomgewichte der ersten 27 Elemente, beginnend mit Helium, sind nicht Vielfache des Atomgewichts von Wasserstoff mit einer ganzen Zahl, wie es sein müßte, wenn PROUTS ursprüngliche Hypothese in ihrer numerischen Form richtig wäre. Dies kann ausgedrückt werden durch die Feststellung, daß die Atomgewichte, bezogen auf Wasserstoff, nicht ganze Zahlen sind. Wenn man jedoch diese Atomgewichte kritisch prüft, so findet man, daß sie von den entsprechenden ganzen Zahlen um einen fast konstanten Prozentsatz abweichen, daß die Abweichung negativ ist und im Mittel den Wert -0.77%, besitzt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19160950102
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  • 8
    Electronic Resource
    Electronic Resource
    Das Wasserstoff-Heliumsystem und die Struktur der komplexen Atome (1916)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 95 (1916), S. 20-38 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Der Grundgedanke dieser zweiten Mitteilung uber die Atomstruktur ist folgender: Das Gesetz, welches bei den Beziehungen von Atomgewicht und Valenz zwischen Gliedern einer jeden radioaktiven Reihe Anwendung findet, trifft auch für die leichteren Atome zu. Bei einer radioaktiven Reihe bedingt der Verlust eines Teilchens mit einer Masse von 4 eine Abnahme der Wertigkeit um 2 und verschiebt so das Element um 2 Gruppen des periodischen Systems nach links, während gleichzeitig die Atomzahl um 2 vermindert wird. Wenn dies auch für die leichteren Elemente, beginnend mit Helium, zutrifft, so müßte die Zunahme um das Gewicht eines Heliumatome für jeden Anwachs um 2 in der Atomzahl die Atomgewichte der Elemente liefern, die zu den Gruppen mit geraden Zahlen gehören. Die nach diesem Verfahren abgeleiteten Atomgewichte stimmen im ganzen mit den experimentell festgestellten Werten überein, woraus hervorgeht, daß die Theorie den Tatsachen entspricht.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19160950103
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  • 9
    Electronic Resource
    Electronic Resource
    Synthese, Aufbau und Eigenschaften Käfigartiger vinyl- und allylsilylierter KieselsäurenProfessor Lothar Kolditz zum 60. Geburtstage gewidmet (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 576 (1989), S. 160-168 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Constitution and Properties of Cage-like Vinyl- and Allylsilylated Silicic AcidsBy silyation of tetramethylammonium silicate [N(CH3)4]8Si8O20 · 69 H2O with vinyldimethylchlorosilane (I) and divinyltetramethyldisiloxane, respectively, or allyldimethylchlorosilane there were synthesized the crystalline silicic esters [CH2=CH(CH3)2Si]8Si8O20 and[CH2=CH—CH2(CH3)2Si]8Si8O20. By means of gas chromatography, mass spectrometry, 1H and 29Si NMR the two compounds were identified to be cage-like double four-ring(D4R)-silicic esters containing eight vinyldimethylsilyl- or allyldimethylsilyl groups, Silylation with a mixture of I and trimethylchlorosilane yields in dependence on the ratio of silanes vinyldimethylsilyltrimethylsilyl D4R silicic esters with average numbers of unsaturated groups 〈 8.
    Notes: Durch Umsatz des Tetramethylammoniumsilicats [N(CH3)4]8Si8O20 · 69 H2O mit Vinyldimethylchlorsilan (I) bzw. Divinyltetramethyldisiloxan oder Allydimethylchlorsilan wurden der Vinyldimethylsilylkieselsäureester [CH2=CH—CH2(CH3)2Si]8Si8O20 und Allyldimethylsilyl-kieselsäureester [CH2=CH—CH2(CH3)2Si]8Si8O20 erhalten. Mit Hilfe der Gaschromatographie, Massenspektroskopie sowie 1H-und 29Si-NMR wurden die Verbindungen charakterisiert und eine käfigartig aufgebaute Doppelvierring (D4R)-Struktur des Kieselsäuregerüsts nachgewiesen, an deren 8 terminalen O-Atomen des Kieselsäuregerüsts nachgewiesen, an deren 8 terminalen O-Atomen des Kieselsäuregerüsts Vinyldimethylsiyl- bzw. Allydimethylsilylgruppen gebunden sind. Durch Silylierung mit I und Trimethylchlorsilan sind in Abhängigkeit vom Mischungsverhältnis Vinyldimethylsilytrimethysily1-D4R-Kieselsäureester mit einer mittleren Anzahl ungesättigter Gruppen 〈 8 herzustellen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895760118
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  • 10
    Electronic Resource
    Electronic Resource
    Thermisches Verhalten von Caesiumchloroferraten(III) und Caesiumchloroferrat(III)-Hydraten. II. Die Rehydratation der Zersetzungsprodukte von Cs3[FeCl6] - Eine ramanspektroskopische Untersuchung unter definierter Wasserdampfatmosphäre [1] (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 215-222 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Thermal Behaviour of Caesiumchloroferrates(III) and Caesiumehloroferrate(III) Hydrates. II. The Rehydration of Decomposition Products of Cs3[FeCl6]  -  A Raman Spectroscopic Study under Definite Atmosphere of Water VapourCs3[FeCl6] formed by dehydration of Cs3[FeCl6] · H2O at about 160°C does not change at normal atmosphere within 3 till 4 hours. Rehydration under the vapour pressure of the eliminated water yields the monohydrate in nearly the same time. In the same manner rehydration of the solid mixture of Cs[FeCl4] and 2 CsCl formed by thermal decomposition of the metastable Cs3[FeCl6] (280°C) produces the intermediates Cs3[Fe2Cl9] and Cs2[Fe(H2O)Cl5] in mixtures with CsCl and, finally, Cs3[FeCl6] · H2O. The formation of Cs3[Fe2Cl9] from Cs[FeCl4] and CsCl is accelerated by water. The reaction cycle has been studied using Raman and IR spectroscopy. The results will be discussed with respect to thermoanalytical data.
    Notes: Wasserfreies Cs3[FeCl6], das durch Entwässerung des Monohydrates bei etwa 160°C gebildet wird, zeigt an der Raumluft innerhalb von 3 bis 4 Stunden keine Veränderungen. Dagegen erfolgt unter dem Dampfdruck des abgespaltenen Wassers in etwa der gleichen Zeit die Rehydratation zu Cs3[FeCl6] · H2O. Auch die Rehydratation des bei der thermischen Zersetzung von metastabilem Cs3[FeCl6] (280°C) gebildeten festen Gemisches von Cs[FeCl4] und 2 CsCl führt über die Zwischenstufen Cs3[Fe2Cl9] und Cs2[Fe(H2O)Cl5] im Gemisch mit CsCl wieder zum Cs3[FeCl6] · H2O. Das Wasser wirkt bei der Bildung von Cs3[Fe2Cl9] aus Cs[FeCl4] und CsCl reaktionsbeschleunigend.Der Reaktionszyklus wird mittels Raman- und IR-Spektroskopie untersucht. Die Ergebnisse werden mit simultanthermoanalytischen Befunden verglichen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875510825
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