Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.最新文献

{"title":"Possible influences of SSPS on the space plasma environment","authors":"Hideyuki Usui, H. Matsumoto, Y. Omura","doi":"10.1109/RAST.2005.1512530","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512530","url":null,"abstract":"Since a space solar power system (SSPS) is constructed in the space plasma environment, there may be some interaction with this environment. We consider possible influences of SSPS on the space plasma environment. We particularly focus on the effect of intense microwave beam emission. Previous rocket experiments of microwave power transmission (MPT) in the space plasma environment revealed the enhancement of low-frequency electrostatic plasma waves in association with the microwave emission. Through corresponding computer simulations with the electromagnetic particle-in-cell method, it was revealed that the electrostatic wave generation is due to the nonlinear three-wave coupling process occurring in the ionospheric plasma. The simulations also predicted electron heating by the excited electrostatic waves. Intense microwave emission in the space plasma may also cause other nonlinear effects such as the ponderomotive force due to the non-uniform spatial distribution of the emitted microwave. This force may disturb the plasma density in the path of the microwave beam. We show some of the results of computer simulations in association with the nonlinear effects of intense microwave emission on the space plasma environment.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124669380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental simulation of satellite relative navigation using computer vision","authors":"M. Abderrahim, J. Diaz, C. Rossi, M. Salichs","doi":"10.1109/RAST.2005.1512596","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512596","url":null,"abstract":"This paper presents a general description of a mechatronics experimental testbed developed to simulate relative autonomous navigation between satellites using computer vision. Since the experimental tests of relative navigation is not feasible in real systems for the costs and risks that implies, it was decided to construct an experimental platform that simulates the spatial mission scenario. The mission to simulate deals with the recognition and inspection of a satellite by means of another autonomous satellite (Chaser), which approaches its target and verify its actual state. Both relative navigation of the chaser and inspection of the target are based on computer vision. The experimental testbed will be used for the simulations of service missions of satellites to test the performance of the developed vision and navigation algorithms and techniques under space dynamics laws. The system uses a 3D model of the object to achieve the estimation of its position and orientation (pose), and to perform tracking by means of images sequences. The pose estimation and feature correspondence determination are to be solved by algorithms that are capable of achieving them simultaneously. The paper presents and discusses the initial results of the two algorithms that are being used in the simulation testbed.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125129989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Building a satellite over the Internet","authors":"L. Mehnen, P. Slowik, F. Rattay","doi":"10.1109/RAST.2005.1512540","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512540","url":null,"abstract":"Distributed in universities all across Europe, a several hundred students-strong team never collectively met in person, but between them they have built a space-ready satellite. SSETI Express is currently being integrated in an ESA clean-room for a planned launch and several are to come.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125953790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Remote controlled satellite ground station","authors":"M. Kasal","doi":"10.1109/RAST.2005.1512608","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512608","url":null,"abstract":"The fully remote controlled AMSAT Phase 3 satellites' ground station was established at the Institute of Radio Electronics, Brno University of Technology. The paper illustrates hardware and software developed for this arrangement. In the past three years the station has provided hundreds of telemetry blocks to AMSAT archive daily. Also the Internet access to the AO-40 satellite is described.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127837761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometric conditions of space imagery for mapping","authors":"K. Jacobsen, G. Buyuksalih, A. Marangoz, U. Sefercik, I. Buyuksalih","doi":"10.1109/RAST.2005.1512622","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512622","url":null,"abstract":"From the test field Zonguldak different high and very high resolution optical satellite images are available like TK350, ASTER, KOMPSAT-1, IRS-IC, SPOT 5, KVR1000, IKONOS and QuickBird. The images partially have been achieved as close to original images (level 1A) and partially projected to a plane with constant object height (level 1B). For some images, based on direct sensor information, a good image orientation is given which for some only has to be improved by a shift in X and Y, while for others only rough orientations are distributed. In addition sometimes the orientation has to be improved by additional parameters to compensate systematic geometric effects. Some orientation information of IKONOS- and QuickBird-images is available also as rational polynomial coefficients (RPCs), describing the relation between the image and the object coordinates by a ration of polynomials.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115193426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"End-to-end architecture of a complete system for the provision of operational fire information services: provider centers and decision support systems","authors":"L. Jimenez-Tunon, G.M. de Mercado, J. Gonzalo, J.M. Cruz","doi":"10.1109/RAST.2005.1512549","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512549","url":null,"abstract":"Once demonstrated that remote sensing technologies are useful in forest fire emergencies, the aim is to provide what users need and when they need it. The inexistence of a fully-operational EO space segment dedicated to these tasks leads to the development of near-operational systems based on current existing technology and trying to conceive new ways of improving results. In this paper, the overall architecture of such a system is presented, compiling the experience acquired in the several aspects of the problem and presenting an integral and comprehensive solution. The system architecture comprises three well-defined parts: the EO reception facilities, the service provider centre(s), and the decision support systems (DSS). The EO data acquisition facilities receive data from sensors whose usefulness for forest fire management has been proved through several demonstrations and studies. This is the case of the MODIS sensor onboard TERRA and AQUA satellites, the AVHRR in NOAA, the CAVHRR in FENG-YUN, and the recent SEVIRI sensor onboard MSG. Future space segments would be incorporated to the system in a progressive manner, leading it into a more operational stage. The service provider centres are conceived as the facilities that ingest EO data from the reception stations along with non-space data, process the information with a set of scientific tools and algorithms (Toolbox), and generate the value-added products directly usable by end-user organizations under an operational scenario. The resulting fire products are then stored in the centre and disseminated to users according to their needs. A near-operational system for forest fire management has to be tailored trying to meet the exact needs of each type of users, focusing specially on real-time requirements. Therefore, this system cannot be either a mere product generator to be accessed by the users or a \"just product-oriented\" supplier. The only solution to achieve the proposed objectives is to wrap the generated products around a customized and committed service envelope delivered at the user-end. This is the mission of the Decision Support Systems (DSS) installed at user premises, which are an essential tool to achieve operational fire information services using satellite data.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115991233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Precision agriculture using hyperspectral remote sensing and GIS","authors":"H. Cetin, J.T. Pafford, T. Mueller","doi":"10.1109/RAST.2005.1512537","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512537","url":null,"abstract":"The objectives of this study were to utilize hyperspectral Real-time Data Acquisition Camera System (RDACS-3; 120 bands and 2/spl times/2m pixel resolution) imagery to examine spectrally sensitive regions for the detection of Nitrogen (N) deficiency in corn and to determine whether hyperspectral and/or multispectral remote sensing, and Geographic Information Systems (GIS) could be used to improve N management through early detection of vegetation stress. Several N studies with varying rates of N fertilizer were conducted in Calloway County, Kentucky, USA to examine the relationships between crop bio physical variables and crop stress. Multi-temporal Hyperspectral RDACS data were collected for the study area. Logistic Regression and Multiple Linear Regression techniques identified spectrally sensitive regions in blue, red and near-infrared wavelength regions of the Electromagnetic spectrum. These regions were modeled and compared with traditional hyperspectral and multispectral techniques. The results of these comparisons revealed the greater effectiveness of hyperspectral imagery feature selection in the shorter red region over the typical Normalized Difference Vegetation Index approach. Hyperspectral imagery with high spectral and spatial resolutions offers distinct advantages over multispectral data for early detection of stress in vegetation. The application of high resolution remote sensing in agriculture should improve fertilizer N use efficiency and reduce N losses to the environment.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132336245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Viewing geometry model evaluation for spaceborne pushbroom imagery","authors":"S. Fotev, N. Georgiev, R. Nedkov","doi":"10.1109/RAST.2005.1512627","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512627","url":null,"abstract":"This paper analyses the accuracy of the orthorectification of the satellite imagery acquired by linear pushbroom sensors using the viewing model of the SPOT mission series. The effect of uncertainty of the initial values of the auxiliary ephemeris and attitude data on the accuracy of the mapping product was investigated. The optimal number and distribution of ground reference points depending on the used Digital Elevation Model was in the focus of the research. The proposed approach can be applied to other high resolution satellite imaging systems when the physical sensor model is known. A very good accuracy of geocoded image was achieved for SPOT-2 Level 1A imagery over Plovdiv (Bulgaria).","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126757474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How can remote sensing and GIS help in the verification of international treaties?","authors":"A. Abushady, A. Frank","doi":"10.1109/RAST.2005.1512623","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512623","url":null,"abstract":"This research is designed to investigate how remote sensing and GIS can be used in the verification regime of International Treaties-It focuses on the semantic difference and transformation from the goals of a treaty to the observable and verifiable elements. A case study for the Comprehensive Nuclear Test Ban Treaty (CTBT) is presented, demonstrating the potential capabilities for the use of Satellite Imagery and Remote Sensing as a verification technology for the use on an On-Site Inspection (OSI) to narrow down the search area for an unknown underground event or a possible underground nuclear explosion. GIS, by spatially linking different layers of information, acts as a logical analytical tool to overview all the inputs for the verification. In simpler words, it adds up all the clues automatically in order to view the whole situation. For example, in the case of a CTBT verification regime, one has multiple data layers in the GIS database representing various technologies. One layer for the Seismic network and findings, another layer for the radionuclide measurements, and another for the visual observation findings. By overlaying all those layers together and by performing spatial querying in the GIS database, suspicious areas are denoted and identified, and hence an On-Site Inspection can be called to concentrate on those areas at first instead of the whole Inspection Area thus saving time and resources. It is clearly demonstrated that Satellite Imagery and GIS are useful tools and technologies in the verification regime for CTB treaty. However, it has to be understood that satellite imagery and GIS alone are insufficient, they have to be used together with all the other technologies stated in the treaty (e.g. seismic, radionuclide, etc.) and that they can not be the only technology used for the verification. Even though they are a powerful tool, they are strongly dependant on human operators and if the analyst makes a mistake in one of his approaches, the whole azimuth of the results shifts towards a wrong solution. Therefore, Satellite Imagery and GIS when integrated with other technologies acts as a strengthening tool to strengthen or weaken the assumptions but not as a litmus test giving a yes or no answer.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116891017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Edge detection in multispectral remote sensing images","authors":"T. Sirin, M. Sağlam, I. Erer, M. Gokmen, O. Ersoy","doi":"10.1109/RAST.2005.1512625","DOIUrl":"https://doi.org/10.1109/RAST.2005.1512625","url":null,"abstract":"In this paper, we discuss edge detection by first using a clustering algorithm followed by a known edge detection filter such as Canny or generalized edge detector (GED). We developed a new clustering method called Self-Organizing Global Ranking (SOGR). Comparative results with multispectral satellite images including SOGR, SOM and K Means clustering methods are discussed. The results show that the two-stage algorithms are better than single stage edge detector algorithms.","PeriodicalId":156704,"journal":{"name":"Proceedings of 2nd International Conference on Recent Advances in Space Technologies, 2005. RAST 2005.","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121943492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}