2017 8th International Conference on Recent Advances in Space Technologies (RAST)最新文献_第9页

Remote sensing image enhancement via bilateral filtering 基于双边滤波的遥感图像增强

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002981

N. H. Kaplan, I. Erer, N. Gulmus

引用次数: 9

Recent advances in GNSS: Technical and legal aspects 全球导航卫星系统的最新进展:技术和法律方面

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002950

Muzaffer Kahvecı

{"title":"Recent advances in GNSS: Technical and legal aspects","authors":"Muzaffer Kahvecı","doi":"10.1109/RAST.2017.8002950","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002950","url":null,"abstract":"The use of artificial satellites for navigational purposes started with Sputnik-I on 04th October, 1957. Transit-I was the first navigation satellite system and observations made on signals from the first Sputnik was started in December 1958. And thus Transit-I became a worldwide navigation system starting from 1964. Soon, it became clear that a global navigation satellite system had much to offer particularly for military users. Consequently, Following the system design studies during 1967–1969, U.S. DoD (Department of Defence) developed a worldwide a space-based navigation system in 1970s. And this system was called as NAVSTAR GPS (NAVigation Satellites by Timing And Ranging Global Positioning System). GPS, originally, was developed to satisfy the U.S. military operational need for a precise navigation system and has been used only for U.S. military purposes until 1980s. But later realizing its potential civil uses, it has been opened to all users free of charge starting from 1980. On the other hand, development of GLONASS began in the Soviet Union in 1976 and the “constellation” was completed in 1995. With the advent of GLONASS system, the term GNSS was begun to be used. As an economic and globally available accurate source of positioning and timing information, GNSS contributes to emerging technologies and applications. Some widely used GNSS-related emerging trends are LBS, multi-modality (road, aviation, maritime and rail), agriculture, surveying, Internet of Things, Big Data, Augmented Reality, Smart Cities, and Multimodal Logistics. On the other hand, using positioning info from GNSS and satellite images from, e.g., QuickBird data, together with digital maps (e.g. Google Earth/Maps) have increased their importance at the national and international levels. And thus, obtaining and using above mentioned data have brought some administrative and legal problems together.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115037704","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}

引用次数: 2

Comparison of linear and nonlinear measurements based orbit estimation EKFs 基于线性和非线性测量的轨道估计ekf的比较

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002999

Murat Bağci, C. Hajiyev

{"title":"Comparison of linear and nonlinear measurements based orbit estimation EKFs","authors":"Murat Bağci, C. Hajiyev","doi":"10.1109/RAST.2017.8002999","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002999","url":null,"abstract":"Extended Kalman Filter (EKF) is a well-known technique in GPS based orbit estimation studies. Pseudoranges, which are established by spaceborne onboard satellite GPS receiver data, are directly used in these classical approaches as nonlinear measurements. On the other hand, the position vector components can be extracted from pseudoranges with an acceptable error tolerance via utilization of a preprocessing block before the EKF algorithm. In this way, these coarse position values can be employed as linear measurements in the EKF algorithm which might be called modern approach. In this paper, the linear and nonlinear measurements based orbit estimation EKF algorithms are developed and analyzed. The Multivariate Newton-Raphson Method (NRM) is used in the modern EKF as preprocessing block. The Auto-Assignment block is implemented for setting up initial state vector in the proposed modern EKF algorithm. The Low Earth Orbit (LEO) satellite's orbital motion is simulated via the J2 perturbative orbit model. Statistical analysis shows that better results can be obtained by using linear measurements in the GPS based orbit estimation EKF algorithm, compared to traditional approach. By contrast, the classical approach is required less computational time. The design complexity of the filter is considerably reduced in the modern approach because of the preprocessing block application.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124086549","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}

引用次数: 1

Guidance and economical digital attitude control of a land-survey satellite 陆地测量卫星制导与经济数字式姿态控制

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002991

T. Somova

引用次数: 0

Developing and modelling of satellite docking algorithm 卫星对接算法的开发与建模

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002987

Y. Erdem, Aras M. Numan Uyar, M. C. Soydan, M. Harmankaya, Furkan Alan, B. Akbulut

引用次数: 1

Design of unmanned semi-autonomous smart probe for near earth space research operations 近地空间研究作业无人半自主智能探测器设计

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003015

Evren Daglarli, E. Aribas

引用次数: 0

Nonlinear simulation of solar sail spacecraft guided motion for near-Earth object exploration 近地天体探测太阳帆航天器制导运动的非线性仿真

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002973

R. Khabibullin, O. Starinova

引用次数: 0

Transformation of surface reflectance of Göktürk-2 images using image-based methods 基于图像的Göktürk-2图像表面反射率变换方法

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003012

Ersan Batur, D. Maktav

{"title":"Transformation of surface reflectance of Göktürk-2 images using image-based methods","authors":"Ersan Batur, D. Maktav","doi":"10.1109/RAST.2017.8003012","DOIUrl":"https://doi.org/10.1109/RAST.2017.8003012","url":null,"abstract":"Atmospheric correction is an important requirement in the pre-processing of satellite images for many applications. In this study, the validity of image-based atmospheric correction methods for Göktürk-2, the first high-resolution reconnaissance and surveillance satellite of Turkey, was evaluated. A comparison was made between the Top of Atmosphere (ToA), Dark Object Subtraction (DOS), and Cosine of the Solar Zenith Angle Correction (COST) methods applied to the Göktürk-2 image. First the image radiance value was calculated, and then the reflectance values were obtained using ToA, DOS and COST algorithms. Normalized Difference Vegetation Index (NDVI) was calculated to evaluate the quality of the methods. A cross-section corresponding to the same area was taken from the NDVI images and comparison was made between image-based atmospheric correction methods. In comparison, it was seen that DOS and COST methods eliminate atmospheric effects by using the information in Göktürk-2 images without any real-time measurements. COST method gives more accurate results in Göktürk-2 images since it is based on images and uses atmospheric transmittance information in the direction of illumination.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127289022","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}

引用次数: 0

OTF analysis of a spaceborne CMOS imaging sensor 星载CMOS成像传感器的OTF分析

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 1900-01-01 DOI: 10.1109/RAST.2017.8002972

K. Alici, O. Karci, A. Yilmaz, C. Ozdemir, F. Oktem, O. Selimoglu

引用次数: 2

Space mining 太空采矿

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 1900-01-01 DOI: 10.1109/rast.2017.8002957

Nazli Can

引用次数: 0