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PE&RS June 1997VOLUME 63, NUMBER 6PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING JOURNAL OF THE AMERICAN SOCIETY FOR PHOTOGRAMMETRY AND REMOTE SENSING
The cover images were created from recently collected, multispectral MODIS Airborne Simulator (MAS) data. The MAS is an airborne scanning spectrometer that acquires high spatial resolution imagery of cloud and surface features from ~ts vantage point on-board a NASA ER-2 high-altitude research aircraft. Clockwise from upper left (center last) the MAS images show: 1. Glaciers near Mt. Hayes in the Alaska Range Data acquired by the MAS are helping to define, develop, and test algorithms for the Moderate Resolution Imaging Spectroradiometer (MODIS), a key sensor of NASA’s Earth Observing System (EOS). MODIS, scheduled for launch aboard the EOS AM-I platform in 1998, is the premier instrument of NASA’s Mission to Planet Earth. The MODIS program will emphasize the use of remotely sensed data to monitor variation in environmental conditions for assessing both natural and Human-induced global change. Research and Data Systems Corporation (RDC) developed these images for Dr. Michael King, MAS Principal Investigator (NASA GSFC), by processing raw instrument counts into calibrated/geolocated radiances and then creating an RGB composite using 3, of the 50 available, MAS spectral bands. For further information contact RDC at 301-982-3700; or browse the RDC (http://www.rdcweb.com) and MAS (http://mas.arc.nasa.gov/) web sites. Highlight Article 651 Underwater Imaging and GIS Integration with Side Scan Sonar (Adobe PDF 858Kb) Peer-Reviewed Articles (Click the linked titles to see the full abstract) 681 Viewing Geometry of AVHRR Image Composites Derived Using Multiple Criteria An analysis of alternative compositing algorithms derived from various combinations of criteria for NDVI, thermal, and view angle suggests potential improvements over the standard maximum NDVI algorithm. 691 Fusion of Satellite Images of Different Spatial Resolutions: Assessing
the Quality of Resulting Images The approach is illustrated by the case of a SPOT image and three different standard methods to enhance the spatial resolution 701 Spectral Reflectance with Varying Suspended Sediment Concentrations in
Clear and Algae-Laden Waters For both clear and algae-laden waters, the linearity in the 8CC-reflectance relationship increased with wavelength between 400 and 900 nm, while a near-linear relationship between SSC and reflectance was found between 720 and 900 nm. 707 Mapping Desert Shrub Rangeland Using Spectral Unmixing and Modeling Spectral
Mixtures with TM Data Based on the field reference spectra of image components, a constrained least-squares method was applied to Landsat TM data over an area in Long Valley, Nevada to calculate vegetation abundance in a pixel. 717 Subpixel Classification of Bald Cypress and Tupelo Gum Trees in Thematic
Mapper Imagery In a comparison with traditional classification techniques (Isodata clustering, maximum likelihood, and minimum distance), the subpixel classification of cypress and tupelo yielded improved results. 727 Mapping City Lights with Nighttime Data from the DMSP Operational Linescan
System Methods are presented for detecting and geolocating visible and near-infrared emission sources from the Defense Meteorological Satellite Program imagery. 735 Statistical Significance and Normalized Confusion Matrices Using sampling distributions and their attendant standard error, the statistical comparison of cell values from two normalized confusion matrices is illustrated. 741 A Large-Scale Aerial Photoghraphic Technique for Measuring Tree Heights
on Long-Term Forest Installations A cost-effective alternative to the clinometer and tape approach for monitoring tree heights is described. Announcements Departments
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