Abstract: Techniques for data fusion in multisources remotely sensed imagery are reviewed.Representation of information,framework,algorithms,control and applications of fusion are included.Problems,possibilities and prospects of data fusion are discussed in conclusion.

Abstract: The updrafted Snowmelt Runoff Model(SRM) was applied to the daily snowmelt runoff simulation of Manas River based on the spring snowcover monitoring of Tianshan Region by using the NOAA/AVHRR satellite data.The results showed that the coefficient of determination of the simulation could reach 0.89,and the deviation of the runoff volumes was within 5.1.If the parameters can be adjusted according to the method described in this paper,the model will be easily used to the similar basins.

Abstract: In this paper, the techniques and models of cloud detection and cloud rehabilitation applied to AVHRR imagery of NOAA meteorological satellite and the basic functions of the operation system on base of Visual Basic language has been introduced.By experimentation and comparing with the fact, the high operation efficiency and precision of the cloud detection and cloud rehabilitation has been acquired. Thereby, the cloud detection and cloud rehabilitation operation system can provide the guarantee of credibled NOAA/ AVHRR imagery in the fields of remote sensing application.

Abstract: A system applied to recognize specialized objects automatically in remote sensing images is presented in this paper. The architecture of system and the flow of process are introduced. An approach to set up object model based on straight\|line features and an algorithm of matching between image and model is proposed. Object model is composed with both a classifying model and a describing model. The former describes the class features of object and is used to detect the existence of object and its location, while the latter is a quantitative description of object and can be used to identify different object belong to the same class. As to matching algorithm, both geometric and physical properties are used hierarchically, and the possible errors made in line extraction are taken into account, making it more robust and efficient.

Abstract: The quantitative method has been applied to research by more and more researchers with remote sensing data recently We also try to apply the quantitative method to study forest fire In this study, a model was developed to identify small burning spots automatically by using multivariate analysis Experiments showed that this model could reduce the interference from cloud and boreal land So it can increase the precision of monitoring small burning spots to some degree

Abstract: With its all\|weather,all time capability,radar remote sensing has great potential for agricultural application.A case on multi\|temporal ERS\|2 SAR images using in crops classfication was presented.Image temporal selection was based on backscattering characteristics and rotation practices of the major crops in the study area.Study on a series of preprocessing techniques on multi\|temporal ERS\|2 SAR Images,including calibration,geometrical correction and speckle reduction was introduced before they could be used later with accuracy.

Abstract: The control of total mass for the land\|based pollutants discharged into bay is important one of method for marine protection in China,and also important for restoring environmental quality.In this paper,the marine geographical information system for total mass control of the land\|based pollutant discharged into bay was finished with GIS platform of ARCVIEW and ARC/INFO in example of Dalian bay in the Liaodong Peninsular.By this system we can undertake management of social and economic information in bay area,analyzing of industrial and subsidence contamination along shore,management of marine environment data from different source,modeling of marine water quality.As a result,the system integrated dynamic model and pollutant disperse model.

Abstract: The rapid land use changes result in the difficulties in timely updating the information of land resources using traditional methods. In order to resolve the difficulties, this paper discusses the principles and methods for dynamic monitoring land use changes and timely updating the database of land resources using the technology of remote sensing (RS), geographical information system (GIS) and global positioning system (GPS), which are also called ‘3S’ technology. Remote sensing is used for change detection of land use, GPS for locating the detected change areas with accurate position data, and GIS for establishing the spatial database of land use and for further analysing and updating the data. A real computer system for the above purpose is established for Fuqing County of Fujian province, China, based on the ‘3S’ technology. The system possesses the functions of dynamic monitoring land use changes and timely updating the data of land use as well as the functions of a general database manage system.

Abstract: Using the X band raw data from SIR C/X SAR, we have succeeded in the formation of an actual spaceborne two pass InSAR Digital Elevation Model. In this article, a new mathematical expression has been proposed to illustrate the principle of this 3D InSAR imaging technique. In the obtaining of this new expression, reasonable approximation was used. Compared with other principle illustrations, it has the following advantages:(1) With only one expression, the relation between the terrain height to be sensed and the phase difference of interferogram in a range line is clearly exposed. (2) An important concept is revealed that the valid component of baseline for height measuring is its projection in the direction vertical to the slant range. (3) It enabled the theoretical analysis of height measuring accuracy affected by some geographic parameters. (4) It can be used for the conversion of the phase difference to terrain height. (5) It suggests the course of signal processing of InSAR. (6) It shows why the relation between phase difference and terrain height is usually considered to be linear in practice. Then, a whole procedure of signal processing of InSAR is given. It is divided into nine steps, and functions of each step have been briefly explained. Last, results of some key steps such as single look complex image of SAR, phase fringe image of interferogram, flat earth modified phase fringe, noise reduced phase fringe, and the final 3D topography are shown.

Abstract: With the development of GPS real time position technology, GPS is widely used in navigation and position for moving objects such as ship and plane. The air\|borne GPS data used for the skyway rectification is used to simulate the fly way, calculate the parameters, and then do the orientation rectification for remote sensing images,so as to make a base for precise geometric rectification.OMIS is an imaging spectrometer made recently by the Institute of Shanghai Technology and Physics. A test fly was conducted in Changzhou city, Jangsu province at August,1998. In this article, an experiment for skyway rectification of OMIS image using airbore GPS data is done and a good result is achived in the experiment.

Abstract: Web\|based GIS system development is a trend in both IT and GIS fields. It's predicted that GIS platform will be transformed from present local or Intranet one to Internet in the near future. In this article, WebGIS was technically analyzed on its technology characteristic and development schemes. And some key technical issues on development of an WebGIS were discussed in detail here. Then a practical development scheme was designed and a prototype system was developed basing on it, which give us some valuable experience on a practical WebGIS development.

Abstract: The principle of ocean Return Signal Simulator (RSS) is briefly introduced, and a design of full system RSS is presented. The multitone digital synthesizer is employed to simulate the spectra of ocean return signal. The pulse regenerative technique is adopted to precisely and accurately simulate the two way path delay of the altimeter transmitting signal and its point target signal. The synchronizing modulation technique is adopted to implement the modulation of the simulated ocean return to the altimeter point target signal, to realize the simulation of the full system ocean return.

Abstract: GPS satellite surveying technique is an important stone mark in surveying and mapping history. Building and developing LADGPS and WADGPS are effective means of improving GPS real time positioning accuracy .Using GPS receivers on ground points and in plane to adapt proper method, which can satisfy the needs of accuracy for aerial triangle survey on several scales .At present, the technique of RS、GIS and GPS integration is an important contents of geomatics researches. The comprehensive utilization of three technologies consists of a processing system of overall, real time and dynamic for earth observation, analysis and application.

Abstract: This paper describes the possibility of surface water quality monitoring using remote sensing technology and the spectral signatures of pure water and other types of water quality. Using airborne and spaceborne data (TM and ERS\|2) analysed with in situ measurements of ground truth points for water quality parameters, some major factors of surface water quality can be derived from remote sensing data by case studies. Concurrent in situ surface water quality measurments, Landsat TM data and ERS\|2 SAR data were obtained in the selected locations in August1997. In situ data included measurements of chlorophyll\|a, total dissolved organic carbon and turbidity, Secchi disk depth, color index, estimated wave height, salinity and surface temperature. The Landsat TM and ERS\|2 SAR data from locations of water samples were extracted and the digital data were examined in their raw states as well as numerous transformations. Significant correlations were observed between digital numbers and surface water quality parameters. The results indicate that it may be possible to derive surface water quality parameters using remote sensing data in our case study area. However, the technique still needs to be refined to detect differences within the range of water quality which is typically found in the area under study.