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This paper describes a new adaptive spectral matched filter that incorporates the idea of regularization (shrinkage) to penalize and shrink the filter coefficients to a range of values. The regularization has the effect of restricting the possible matched filters (models) to a subset which are more stable and have better performance than the non-regularized adaptive spectral matched filters. The effect...
In recent years, the water and sediment were dropped significantly in Yellow River, the average annual water and sediment discharge was 143.5 X 108 m3 and 3.75 X 108 t respectively, accounting for 29.2% and 31.2% of the 1950-1969 values. In addition, the day of flow depletion was also increased continuously and there was 21 years of flow depletion from 1972 to 1998. Especially in 1997 the day of flow...
Ontology is the branch of metaphysics that deals with the nature of being. Ontology is currently used by philosophers, information scientists and psychologists. A sharing ontology is required for communicating between the communicating participants. And the formal description of ontology is fundamental to data exchange standards. In recent years, ontology has been used by geographers. Many researchers...
Data and interactions with data are becoming less dependent on centralized systems today. Particularly, when peer- to-peer (P2P) networks are widely used, many distributed methods are applied in different researches. The data in Geographic Information Systems (GIS) are multi-dimensional, scattered and complex data. Those special traits make it difficult for spatial data to be retrieved in traditional...
Both surface topography and vegetation heterogeneity are important factors introducing biases in regional ecological modeling, especially when the modeling is made at large grids. Several studies have demonstrated that gridding the land surface into coarse homogeneous pixels may cause important biases on ecosystem model estimations of carbon budget components at local, regional and global scales....
In this paper, we propose the method for generating the 3D mobile map on mobile device for having low computing power like PDA, and also introduce the climbing guidance system which is developed by using the 3D map. In order to implement 3D mobile map on mobile device, DEM and raster image are decomposed to the specific data structure which is called 'Parcel'. The parcel data can be visualized with...
Tibet Plateau Environmental and Geological Information Monitoring System (TPEGIMS) has two working modes, C/S and B/S. According to uniformly spatial geography benchmark, TPEGIMS with multi-functions, multi-layers and multi-specialities has several themes, such as modern glacier, snow line, river, lake, geological disaster, desertification, geological structure. This paper mainly introduces TPEGIMS's...
In this paper, the spatial distribution and changes of Maqu wetlands were acquired by use of landsat-5 TM and landsat-7 ETM+ data in 1990, 1994, and 2001, and using GIS techniques and the Stepwise Discriminant Analysis of spatial- statistics, which based on seven variables, including band-1, band-2, band-3, band-4, band-5, band-7, and altitude, and avoided the lose and overlap of information. It was...
In this work we present a tomographic-like methodology for the retrieval of the vertical profile of nitrogen dioxide (NO2) and ozone (O3) in the boundary layer from ground based remote sensing measurements. A set of NO2 and O3 slant column densities at different elevation angles can be obtained with the Differential Optical Absorption Spectroscopy (DOAS) technique used in the multiple axis configuration...
This paper describes the geometrical characteristics of the platforms and instruments of the A-train constellation. We also provide a brief description of the A-Train data subsets that have been collocated to exploit the synergistic potential of the various instruments. Finally we present some sample image products from our web-based Giovanni tool which allows users to display, compare and download...
Aerosol index measurements from the total ozone monitoring spectroradiometer (TOMS) revealed the aerosol concentrations scattering properties to the UV radiations during the season well known to the locals and named as the black cloud season. Aerosol optical depth (AOD) obtained from moderate resolution imaging spectroradiometer (MODIS) showed the high aerosol concentrations during October of each...
Atmospheric aerosol has aroused increasing interests because of its mounting evidence of the importance of aerosol radiative forcing of climate, and its effect on cloud microphysics and albedo. Correct estimation of aerosol information is also essential to satellite remote sensing interpretation, especially to atmospheric correction of ocean color remote sensing. It is now being realized that aerosols...
In this paper, an innovative method for simultaneous retrieval of AOT at 0.55 and 0.66 mum from advanced along-track scanning radiometer (AATSR) TOA radiance is presented which exploits multi-spectral and dual-angle view capabilities, based on the fact that the consistent angular dependence of reflectance exists in a certain spectrum and is invariable with wavelength. No assumptions are required about...
Aerosol optical thickness retrieval (AOT) from remotely sensed data over land is still a difficult task because the solar light reflected by the Earth-atmospheric system mainly comes from the ground surface. A novel aerosol remote sensing model SYNTAM by exploiting the synergy of TERRA and AQUA MODIS data could be used to accomplish part of the task of aerosol retrieval over land, especially over...
A good calibration of satellite is necessary to derive reliable quantitative measurements of the surface parameters or to compare data obtain from different sensors. DCSRS (Demonstration Center for Spaceborne Remote Sensing of China National Space Administration) went to inner-Mongolia Plateau to seek fairly uniform reflectance sites as a part of Beijing multifunctional test site network in May and...
This paper describes the new development and the improvement of the 1.6 mum InGaAs transfer standard radiometer to be used for the preflight cross-calibration measurement between the GOSAT and the OCO. Both are to be launched in 2008 for monitoring the density distributions of greenhouse gases.
This Paper described that in-flight radiometric calibration for thermal channels of TERRA-MODIS sensors using a new calibration test site-Dali-lake, China. The radiance of water surface was measured by CE312, and the spectral transmittance and upward radiance of the atmosphere was calculated using radiance transfer model MODTRAN4. At the same time the spectral response of Satellite sensor and that...
This paper aims at presenting a model able to study the impact of the target presence under vegetation and to assess the detection feasibility. In a first part the model is described. We will then get at the analysis of results for several set of radar configurations to illustrate the potentiality of detection by means of shadows.
Summary form only given. The German Aerospace Center (DLR) has developed the TerraSAR-X Ground Segment. One part is the geocoding system that provides orthorectification capability for multi- resolution, multi-polarisation and multi-frequency data. Besides an ellipsoid corrected product a new product called Enhanced Ellipsoid Corrected (EEC) will be offered that considers digital elevation models...
The space mission TerraSAR-X is the first German space project implemented under a Public Private Partnership (PPP). Cooperation partners are the German Aerospace Centre (DLR) and EADS Astrium GmbH. Within this construct, DLR will be responsible for the scientific use of the TerraSAR-X data, whereas commercial marketing will be undertaken exclusively by Infoterra GmbH, a wholly-owned EADS Astrium...
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