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Compared to other satellite data, SPOT5 image has obvious advantage in spatial resolution of 2.5 m for panchromatic image satisfied with the demand of land use updating survey at 1: 10,000 scale theoretically. But unfortunately, few studies have been done on area precision of the features. In this paper, one case study was taken in Longxiang section of Zhejiang province in China. A system area precision...
The potential vegetation index determined by environmental conditions especially climate is the ideal baseline for assessing vegetation degradation based on remote sensing. After eliminating irrigated areas. This paper estimated the potential vegetation index by imitating upper borderline of scatter spots in the coordinates space of climate aridity index and remote sensing vegetation index. Then we...
Selected frontier zone as a study area, based on the application of remote sensing monitoring and GIS spatial analysis, completed the study on landscape structure change and the space extension effect. The preliminary results indicate that: 1) woodland was the main landscape as the matrix, while the mountain's lawn, dry land, paddy field, water area, and construction land etc. as the landscape's patch...
Knowledge about changes of SOC and other properties under influence of human activities in arid zone is very important for local cropland persistent management. In our study, SOC and selected soil properties had been investigated in the Linze country located in Hexi corridor, northern west China. The GIS tool was used to explain the causes resulted in SOC spatial distribution. The results indicated...
Based on the regionalizing zones, districts, and the regions in western China, this paper elaborates the main characteristics and the problems of every eco-economic zones, districts, and regions, which are all based on the GIS analyst and the comprehensive geographical statistic analyzing, we list the main indexes used in the regionalizing and the results to show the main character of each region,...
The Heihe River is located in the northwest of the country. The river which originates on the northern side of the Qilian Mountain, flows through the north of the Hexi corridor and disappears in the Badan Jiran Desert on the Ala-shan Plateau. The weather in this region is controlled by the continental climate and the Tibet Plateau climate. The Eji-na Oasis in the Heihe River's downstream is generally...
There are three characteristics for ecosystem services, zonal characteristics, complexity and conventional civilization, which affect ecological valuation directly. Considering regional environment and anthropogenic influence, grassland's ecosystem services in Gansu Province are concluded 11 types, including gas regulation, climate regulation, disturbance regulation, wind erosion control and sand...
This research integrated the RMsed Universal Soil Loss Equation (RUSLE) model with RS and GIS techniques to quantify soil erosion risk. Based on two times RS images of Landsat in 1980 and 1995, the area and the quantity changes of soil erosion in upper Chao River basin of China was studied. And the effect on soil erosion caused by landuse change and rainfall since 1980s was researched and compared...
This paper describes the development and system concept for an active and highly integrated, digitally controlled SAR system calibrator. For precise and high-quality SAR data, precise ground targets are necessary for external calibration of the SAR data. Compared to passive targets, active radar targets like transponders offer more features. The recording of the transmitted radar signals from the...
A SAR simulator for image quality evaluation is presented. This simulator can be used for the estimation of SAR image quality performance from the simulated raw data and the verification of the SAR payload design parameter associated with the image quality parameters. Evaluation of SAR image quality is achieved by analyzing the error effect of system parameter using the developed simulator.
Positioning accuracy by the Global Positioning System (GPS) is of great concern in a variety of research tasks. It is limited due to error sources such as ionospheric effect, orbital uncertainty, antenna phase center variation, signal multipath, and tropospheric influence. In this study, the tropospheric influence, primarily due to water vapor inhomogeneity, on GPS positioning height is investigated...
Our goal is to perform real time detection and direct high resolution imaging of millimeter continuum sources with multiple aperture interferometry. This is done by coupling a millimeter wave array to an optical interferometer via an electro-optic modulator array. We choose a concentric ring antenna array to efficiently snapshot sample the Fourier plane uniformly and isotropically, and minimize the...
The Tibetan part of National Highway 317 locates in Southeast of Tibet. Geological disasters such as landslides, debris flows and rock-falls happen frequently in this highway and bring about great damage in peoples’ lives and properties. How to make clear the geological status will be designed and maintained by disaster’s father of National Highway 317. In this paper, the Landsat ETM data, with the...
In this paper, harmonic analysis of 10-year time series (1995-2005) NOAA/AVHRR yearly composite images is performed to develop an innovative technique for hotspot detection and land-features classification based on temporal changes in the NDVI and various AVHRR band values. NOAA/AVHRR images are used due to wide coverage, high frequency and free acquisition offered by NOAA/AVHRR sensors. Proposed...
Limited data on major earthquakes near coastlines show these occur in the morning. This implies that the solar position has a possible role in contributing to coastal quakes. Several quakes are listed by location, local time of quake, and lunar phase. Satellite-borne remote sensors now assessing volcanoes and other remote sensors may have potential in anticipating locations of major earthquakes.
The 2004 Sumatra earthquake, together with the tsunami that followed, caused massive destruction in many coastal areas of the Indian Ocean. Uplift and subsidence of land near to the epicenter of the earthquake in the Andaman Sea have been reported. In this paper, we report observations of the uplift in high resolution SPOT-5 satellite images in a coral island near to the Andaman Islands. The depth...
The Flood Dragon project enhances the Envisat contribution for natural disaster monitoring such as flooding. During the 2005 and 2006 Chinese flood seasons, over the 23 attempted NRT exploitations of Envisat, 19 were successful, allowing exploitation of emergency programming procedures as well as Rolling Archive capabilities (based on ordinary long term acquisition scheduling). Obtained results are...
The electromagnetic inverse scattering problem of localizing a planar conducting interface buried in a half-space background medium is dealt with. The illuminating field is provided by plane waves at fixed frequency and varying angle of incidence and the inversion is achieved by means of the truncated singular value decomposition (SVD) of the involved linear operator. Emphasis is put on the derivation...
The configurations and specifications of the newly- bought Microwave Radiometer in Beijing Normal Uniersity, China, RPG-8CH-DP, is introduced. The calibration method for monitoring soil moisture is described in this paper.
Leaf area index (LAI) is an important parameter for estimating growth status of crops. An important method for retrieving LAI from remotely sensed observations is by the canopy reflectance model inversion. But many model inversion methods didn't take into account the relationship between estimated LAIs in different crop growth stages. In this research, we consider the crop growth model which describe...
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