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Satellite constellations harvest energy for near-total global coverage（图）
Satelliteconstellations harvest energy global coverage
2020/1/19
Think of it as a celestial parlor game: What is the minimum number of satellites needed to see every point on Earth? And how might those satellites stay in orbit and maintain 24/7 coverage while conte...
INVESTIGATING THE INFLUENCE OF TREE COVERAGE ON PROPERTY CRIME: A CASE STUDY IN THE CITY OF VANCOUVER, BRITISH COLUMBIA, CANADA
Crime Mapping LiDAR GIS
2016/7/8
With the development of Geographic Information Systems (GIS), crime mapping becomes an effective approach to investigate the spatial pattern of crime in a defined area. Understanding the relationship ...
Linear Time Approximation Schemes for Geometric Maximum Coverage
Maximum coverage Geometric set cover Polynomial-time approximation scheme
2016/1/22
We study approximation algorithms for the following geo-metric version of the maximum coverage problem: Let P be a set of n weighted points in the plane. We want to place m a × b rectangles such that ...
REMOTE SENSING MONITORING OF THE DYNAMIC CHANGES OF VEGETATION COVERAGE AND ITS TYPES BEFORE AND AFTER THE EMERGENT WATER TRANSPORTATION TO THE LOWER REACHES OF THE TARIM RIVER
Environmental Monitoring Spatial-temporal Analysis Spatial database Remote Sensing Vegetation Coverage Vegetation Type Tarim River
2015/12/31
Two factors of the vegetation coverage and its types sensible to the ecological changes before and after the Emergent Water Transportation Project are investigated based on three periods of the multi-...
ESTIMATION OF GLACIERS AND SNOW COVERAGE IN WESTERN PART OF MONGOLIA USING MODIS SNOW PRODUCTS
MODIS Glaciers Snow Coverage
2015/12/31
The purpose of the research study is to determine area Glaciers and Snow Coverage in Western part of Mongolia using by remote sensing methods. MODIS snow product by 8 day temporal resolution for June-...
THE MEASUREMENT OF THE TREE ASSEMBLAGE’S COVERAGE IN RIVER CHANNEL BY LIDAR
Lidar Flood Disaster Tree Rate DEMs Gound Data First Pulse Data
2015/12/28
The purpose of this project is the flood disaster prevention. Recently it has been happened frequent floods in the small and middle size rivers caused of the local heavy rainfalls in Japan. The Japane...
Vegetation coverage change in Miyun County and its affecting factors based on 3S
GIS land cover land use vegetation detection
2015/12/23
Vegetation index is one of the important parameters describing the land cover characters while remote sensing is generally used in getting regional vegetation index. In this article TM remote sensing ...
AUTOMATIC PRODUCTION OF A EUROPEAN ORTHOIMAGE COVERAGE WITHIN THE GMES LAND FAST TRACK SERVICE USING SPOT 4/5 AND IRS-P6 LISS III DATA
GMES IMAGE2006 CLC2006 orthoimages matching SPOT 4 SPOT 5 IRS-P6
2015/9/17
Since the mid 1980s an European Land Cover dataset has been regularly produced for land cover changes, land cover map (CORINE), high resolution forest layer and built-up areas including soil sealing. ...
KLEE:Unassisted and Automatic Generation of High-Coverage Tests for Complex Systems Programs
KLEE Unassisted and Automatic Generation High-Coverage Tests Complex Systems Programs
2015/8/7
We present a new symbolic execution tool, KLEE, capable of automatically generating tests that achieve high coverage on a diverse set of complex and environmentally-intensive programs. We used KLEE to...
A New Method for Coverage Prediction for the Wide Area Augmentation System (WAAS)
Coverage Prediction Wide Area Augmentation System (WAAS)
2015/6/29
To provide a detailed analysis framework for WAAS accuracy prediction, a new method has been developed which combines GPS geometry simulation with least squares covariance analysis. This approach cons...
Flight Trials of a Geostationary Satellite Based Augmentation System at High Latitudes and for Dual Satellite Coverage
Flight Trials Geostationary Satellite Based Augmentation System High Latitudes Dual Satellite Coverage
2015/6/29
Several flight demonstrations have taken place over the past few years to show how the Wide-Area Augmentation System (WAAS), currently under development for the Federal Aviation Administration, will i...
Improving GPS Coverage and Continuity:Indoors and Downtown
Improving GPS Coverage Continuity:Indoors Downtown
2015/6/26
These days, GPS use is being extended into areas where hitherto it simply was not available. For years, it has served society remarkably well for survey, aviation use, maritime use and a host of other...
The Loran coverage availability simulation tool (LCAST) was initially created for the 2004 Federal Aviation Administration (FAA) Loran technical evaluation report. The tool incorporated the then curre...
In the next few years GPS will start broadcasting civil signals suitable for aviation use on both the L1 and L5 frequencies. In addition, Galileo and other constellations will offer an even greater nu...
EXPLORING THE RELATIONSHIPS BETWEEN LAND SURFACE TEMPERATURE, GROUND COVERAGE RATIO AND BUILDING VOLUME DENSITY IN AN URBANIZED ENVRONMENT
Land surface temperature Ground coverage ratio
2015/5/6
The objective of this study is to explore and compare the relationships between urban land surface temperature (LST), ground coverage ratio (GCR) and building volume density (BVD). Landsat ETM+ data...