Remote Sensin Environment An Interdisciplinary Journal VOLUME 62, NUMBER 1, OCTOBER 1997 Contents G. ]. Hay, K. O. Niemann, and D. G. Goodenough Spatial Thresholds, Image-Objects, and Upscaling: A Multiscale Evaluation 1 J. Chorowicz, E. Lopez, F. Garcia, J.-F. Parrot, J.-P. Rudant, and R. Vinluan Keys to Analyze Active Lahars from Pinatubo on SAR ERS Imagery 20 Kevin White, John Walden, Nick Drake, Frank Eckardt, and Jeff Settle Mapping the Iron Oxide Content of Dune Sands, Namib Sand Sea, Namibia, Using Landsat Thematic Mapper Data 30 J. H. Everitt, D. E. Escobar, J. R. Noriega, I. Cavazos, and M. R. Davis A Video System Capable of Simulating Landsat TM 5, 4, 3 Imagery 40 F. F. Gerard and P. R. ]. North Analyzing the Effect of Structural Variability and Canopy Gaps on Forest BRDF Using a Geometric-Optical Model 46 Dan Lubin, Caren Garrity, René O. Ramseier, and Robert H. Whritner Total Sea Ice Concentration Retrieval from the SSM/I 85.5 GHz Channels during the Arctic Summer 63 Stephen V. Stehman Selecting and Interpreting Measures of Thematic Classification Accuracy 77 J. Otterman, D. Starr, T Brakke, R. Davies, H. Jacobowitz, A. Mehta, F. Cheruy, and C. Prabhakara Modeling Zenith-Angle Dependence of Outgoing-Longwave Radiation: Implication for Flux Measurements 90 A. Rosema and H. Zahn Laser Pulse Energy Requirements for Remote Sensing of Chlorophyll Fluorescence 101 M. J]. Wooster and D. A. Rothery Time-Series Analysis of Effusive Volcanic Activity Using the ERS Along Track Scanning Radiometer: the 1995 Eruption of Fernandina Volcano, Galapagos Islands VOLUME 62, NUMBER 2, NOVEMBER 1997 Contents J.-P. Deroin, Y. Marchand, and J.-P. Auffret Littoral Survey Using the JERS-OPS Multispectral Sensor: Example of the Mont-Saint-Michel Bay (Normandy, France) J. L. Foster, A. T. C. Chang, and D. K. Hall Comparison of Snow Mass Estimates from a Prototype Passive Microwave Snow Algorithm, a Revised Algorithm and a Snow Depth Climatology C. P. Lo and Benjamin J. Faber Integration of Landsat Thematic Mapper and Census Data for Quality of Life Assessment J. Liu, J]. M. Chen, J. Cihlar, and W. M. Park A Process-Based Boreal Ecosystem Productivity Simulator Using Remote Sensing Inputs Geeske Joel, John A. Gamon, and Christopher B. Field Production Efficiency in Sunflower: The Role of Water and Nitrogen Stress Peng Gong, Ruiliang Pu, and Bin Yu Conifer Species Recognition: An Exploratory Analysis of In Situ Hyperspectral Data VOLUME 62, NUMBER 3, DECEMBER 1997 Contents Baoxin Hu, Wolfgang Lucht, Xiaowen Li, and Alan H. Strahler Validation of Kernel-Driven Semiempirical Models for the Surface Bidirectional Reflectance Distribution Function of Land Surfaces D. Pozo Vazquez, F. J]. Olmo Reyes, and L. Alados Arboledas A Comparative Study of Algorithms for Estimating Land Surface Temperature from AVHRR Data D. A. Roberts, R. O. Green, and J. B. Adams Temporal and Spatial Patterns in Vegetation and Atmospheric Properties from AVIRIS Toby N. Carlson and David A. Ripley On the Relation between NDVI, Fractional Vegetation Cover, and Leaf Area Index Luoheng Han and Donald C. Rundquist Comparison of NIR/RED Ratio and First Derivative of Reflectance in Estimating Algal-Chlorophyll Concentration: A Case Study in a Turbid Reservoir Julienne Stroeve, Anne Nolin, and Konrad Steffen Comparison of AVHRR-Derived and In Situ Surface Albedo over the Greenland Ice Sheet Robert E. Kennedy, Warren B. Cohen, and Gen Takao Empirical Methods To Compensate for a View-Angle-Dependent Brightness Gradient in AVIRIS Imagery Author Index Subject Index Volume Contents