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Volcanic Landforms (X)

       
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Records: 1 - 40 of 1,107 - Pages: 
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Date: 1995, Volume: Report-Number: AD-A324458; NAS 1.15:110075; NASA-TM-110075; NRL/MR/6790--97-7935
Book Id: WPLBN0004292608
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Lashlee; J. David (Jon David); Abstract: Chameleon is a Physics-Based Landscape Modeling Software System Designed for Modeling; Simulations. Hyperspectral Laboratory; Field; Imaging Spectrometer Measurements Are Collected as Empirical Foundation Data. Linear Spectral Unmixing Decomposes Each Image Pixel Into Spectral Endmembers. Spectral Editing Tools Allow Mathematical Manipulation of These Fractional Abundances; Introduction of New Spectral Information. Image Spectra Are Modified on a Sub-Pixel; Per-Pixel; Or Neighborhood Basis; Or the Entire Hypercube Can Be Customized at Once. Chameleon Then Regenerates Synthetic; But Spectrally Accurate; Terrain Models Using Linear Spectral Remixing Algorithms. by Incorporating Elevation; Sun Angle; Weather Data; The Landscape Becomes a “chameleon”—able to Change Hyperspectral Properties Based on Multitemporal Spectral Measurements; Requirements for Developmental Tests; Operational Training; Or as Required by Specific Simulation Scenarios. Advanced Knowledge of Natural Environments to Be Modeled is Prerequisite to Generating Useful Synthetic Terrains. Our Spectral Research on Arid Quaternary Geomorphic Surfaces Suggests That Deserts (Often Assumed to Be Less Difficult to Study Remotely Than Humid; Temperate; Cold Environments) Are More Complex Than is Generally Accepted. a Variety of Rock Coatings Can Significantly Alter Reflectance in the Solar Reflected Spectrum. Weathering Rinds; Carbonate Deposits Inhibit Lithologic Reflectance Altogether. However; Manganese-Rich Rock Varnish Obscures Rock Reflectance in the Visible; Near Infrared Wavelengths; But Transmits Lithologic Information in the 2000 to 2500 Nanometer Wavelengths. Surface Soils on Desert Pavements Consist of a Layer of Eolian Dust That Overlies an Accreting Vesicular (Av) Horizon. These Soils Have Same Structure; Chemistry; And; Therefore; The Same Hyperspectral Signature; Regardless of Landform Age; Geomorphic Process; Or Parent Material. from a Remote Sensing Perspective; This Has a Normalizing Effect on Reflectance Across the Landscape. Spectral Mixture Analysis is a Proven Hyperspectral Technique for Mapping Composition; Abundance of Surface Materials Characteristic of Volcanic Landforms That Exhibit Diagnostic Absorption Features. We Found That Desert Pavement Spectra Are Featureless in That They Exhibit Few Distinct Spectral Features Related to Rock Varnish; Clast Lithology; Or Soil. Image Spectra of These Surfaces Are the Result of Intimate Mixtures of Heterogeneous Materials; Requiring Non-Linear Spectral Unmixing Solutions.;
Book Id: WPLBN0012185260
Subjects: Chameleon, Colorado, Concept
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Book Id: WHEBN0012095690
Subjects: Canada, Tephra, Paleogene
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Date: 1994, Volume: Report-Number: AIAA PAPER 94-3011; E-8694; NAS 1.15:106610; NASA-TM-106610
Book Id: WPLBN0004288417
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Date: 2005, Vol. 5, Issue 2
Book Id: WPLBN0003983187
Subjects: Science, Natural, Hazards
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Date: 1997, Volume: Report-Number: NAS 1.15:207252; NASA/TM-95-207252
Book Id: WPLBN0004293503
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Date: 2012, Vol. 19, Issue 6
Book Id: WPLBN0003976674
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Book Id: WHEBN0025498415
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Book Id: WPLBN0010839095
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Book Id: WHEBN0001572073
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Date: 2014, Vol. 2, Issue 1
Book Id: WPLBN0004007850
Subjects: Science, Earth, Surface
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Book Id: WHEBN0000296543
Subjects: Karst, Dune, Cave
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Book Id: WPLBN0001507487
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Date: 2014, Vol. 2, Issue 2
Book Id: WPLBN0004007764
Subjects: Science, Earth, Surface
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Book Id: WHEBN0000032571
Subjects: Alaska, Jupiter, Basalt
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Book Id: WPLBN0001086291
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Date: 2014, Vol. 11, Issue 23
Book Id: WPLBN0003977528
Subjects: Science, Biogeosciences
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Book Id: WHEBN0034348389
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Book Id: WPLBN0000473832
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Date: 2013, Vol. 7, Issue 1
Book Id: WPLBN0003973678
Subjects: Science, Cryosphere
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Book Id: WHEBN0001045133
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Book Id: WPLBN0001797177
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Date: 2012, Vol. 6, Issue 5
Book Id: WPLBN0004022750
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Book Id: WHEBN0001035617
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Date: 2015, Vol. 6, Issue 2
Book Id: WPLBN0004021333
Subjects: Science, Solid, Earth
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Book Id: WHEBN0011144686
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Book Id: WPLBN0000265915
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Date: 2014, Vol. 6, Issue 2
Book Id: WPLBN0004021989
Subjects: Science, Solid, Earth
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Book Id: WHEBN0001663068
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Book Id: WPLBN0002203280
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Date: 2006, Vol. 1, Issue 3
Book Id: WPLBN0004007123
Subjects: Science, Eearth, Discussions
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Book Id: WHEBN0026560562
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Book Id: WPLBN0000126277
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Date: 2015, Vol. 8, Issue 4
Book Id: WPLBN0004009861
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Book Id: WHEBN0040194324
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Book Id: WPLBN0001668513
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Book Id: WHEBN0010663761
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Book Id: WPLBN0000294133
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Book Id: WPLBN0000242783
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Book Id: WHEBN0026777763
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Book Id: WPLBN0001008147
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Date: 2009, Volume: 118, no. 5, Jun 2009
Book Id: WPLBN0002212766
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Book Id: WHEBN0018062821
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Book Id: WPLBN0002189688
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Date: 1944, Volume: May 1944
Book Id: WPLBN0002117226
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Book Id: WHEBN0000987386
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Book Id: WPLBN0002202166
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Book Id: WPLBN0000121222
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Book Id: WHEBN0000593364
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Book Id: WPLBN0000005508
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Book Id: WHEBN0018195172
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Book Id: WPLBN0000036553
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Book Id: WHEBN0032104948
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