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

Liability for GNSS signals and services GNSS信号和服务的责任

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002958

Nazli Can

引用次数: 2

Wide-area spaceborne maritime surveillance system 广域星载海上监视系统

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002930

U. Leloglu, E. Tunali

{"title":"Wide-area spaceborne maritime surveillance system","authors":"U. Leloglu, E. Tunali","doi":"10.1109/RAST.2017.8002930","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002930","url":null,"abstract":"Wide Area Aerial Surveillance (WAAS) systems are gaining popularity nowadays. The main function of WAAS systems is to obtain high resolution images of a large area and create knowledge to facilitate situational awareness. To accomplish that, these systems circling over city-size regions, typically at an altitude of 10.000 feet or higher, obtain images at GSDs of 20–50 cm at around 1–2 fps. Instead of transferring huge amount of raw data, it is processed onboard and extracted data is transferred. In this paper, the possibility of applying the same approach to space for the purpose of maritime surveillance is investigated. The ultimate purpose of Wide-Area Spaceborne Maritime Surveillance System (WASMAS) is to create a near real time map of ship movements all over the world. Following a requirement analysis and basic properties of the optical payload, concept of operations are introduced. An orbital analysis of the constellation is given and possibility of on-board real-time image analysis is discussed. Preliminary results are promising and shows that the system can be realized in large cubesat platforms. However, further research is required.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"37 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":"122373265","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

Contribution of UNISEC-global to capacity building in space engineering 联合国教科文组织-全球对空间工程能力建设的贡献

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002949

Mohammed Khalil Ibrahim, R. Kawashima, A. Aslan

{"title":"Contribution of UNISEC-global to capacity building in space engineering","authors":"Mohammed Khalil Ibrahim, R. Kawashima, A. Aslan","doi":"10.1109/RAST.2017.8002949","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002949","url":null,"abstract":"Capacity building in space engineering is vital process to space development at both the national and international levels. Long term sustainability is also vital to the future space activities. This is a key theme of the discussions in global space forums such as UNCOPUOS. The issue of increasing density of debris in orbit is very relevant to nano-satellite activities at university level. The University Space Engineering Consortium (UNISEC) in Japan was established to support and promote practical space project development activities, such as nano-satellites and hybrid rockets at university level. The UNISEC concept in Japan is to facilitate activities by providing a platform where members can show and exchange the progress and lessons learned from each other. Sharing UNISEC experience and know-how with non-space faring nations was one of the main motivation to establish the UNISEC-Global in 2013 as well as fostering the international cooperation. This present paper presents the concept of UNISEC, establishment of UNISEC-Global and its contribution to the long term space sustainability and development.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"9 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121003756","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

Collision avoidance dynamics for optimal impulsive collision avoidance maneuvers 最优脉冲避碰机动的避碰动力学

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002935

R. Abay

引用次数: 4

Internal defect detection in hollow cylindrical structures using the Surface Response to Excitation (SuRE) Method 基于表面激励响应(SuRE)方法的空心圆柱结构内部缺陷检测

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002955

Amin Baghalian, Shervin Tashakori, Jason R. Soto, V. Senyurek, I. Tansel, Balemir Uragun

{"title":"Internal defect detection in hollow cylindrical structures using the Surface Response to Excitation (SuRE) Method","authors":"Amin Baghalian, Shervin Tashakori, Jason R. Soto, V. Senyurek, I. Tansel, Balemir Uragun","doi":"10.1109/RAST.2017.8002955","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002955","url":null,"abstract":"Active structural health monitoring methods are becoming increasingly popular for defect detection in hollow cylindrical structures utilized in aerospace applications. Electro mechanical impedance (EMI) based methods are commonly used to study the health of hollow cylinders in broad frequency ranges. However, the EMI analyzers are bulky and costly. In addition, EMI based methods require high quantity of sensors for monitoring a large area. The Surface Response to Excitation (SuRE) method was developed to eliminate the need for EMI analyzers in broad frequency range inspections and to decrease the number of sensors in monitoring of large structures. In this study, the performance of the SuRE method in detection of internal defects is evaluated theoretically and experimentally. Different internal damages were created in an aluminum pipe specimen. The data collected from four bonded piezoelectric elements were used for damage detection and quantification. The test results showed the high sensitivity and robustness of the SuRE method in internal damage detection.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"35 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":"115273339","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: 8

In-flight ground sampling distance estimation of Alsat-1 imager Alsat-1成像仪飞行中地面采样距离估计

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002967

K. Benahmed, A. Rachedi, I. Taleb

引用次数: 0

Water quality management using nanosatellites 利用纳米卫星进行水质管理

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002951

A. Asian, M. Toklu, B. Karabulut, C. Yanm, M. Şimşek, T. B. Karyot, N. Gallah, O. Ben Bahri, A. Chaouch, N. Lazreg, N. Habbachi, M. Mansour, C. Hamrouni, N. Tahri, A. Alimi, K. Besbes

{"title":"Water quality management using nanosatellites","authors":"A. Asian, M. Toklu, B. Karabulut, C. Yanm, M. Şimşek, T. B. Karyot, N. Gallah, O. Ben Bahri, A. Chaouch, N. Lazreg, N. Habbachi, M. Mansour, C. Hamrouni, N. Tahri, A. Alimi, K. Besbes","doi":"10.1109/RAST.2017.8002951","DOIUrl":"https://doi.org/10.1109/RAST.2017.8002951","url":null,"abstract":"Within the context of bilateral cooperation between Turkey and Tunisia, a Project called “Development of Intelligent Control Modules for Nano Satellites” was initiated in May 2015. Due to political changes in both countries the Project could effectively start on May 2016. The project aims at developing nanosatellite based water quality monitoring within the MENA region. Turkish side consists of researchers from Istanbul Technical University, while Tunisian team has two intuitions, University Monastir of and University of Sfax. Project involves 8 team visits, 4 in each country. In those meetings, teams agreed on a mission and related payload. The mission is monitoring dam water parameters (levels, salinity, pollution, temperature, etc.) in Tunisia using ground sensor data. The Tunisian team is responsible of development of ground sensor system and contributing to the control of the nanosatellite. Space segment main duty is store and forward. Therefore a 2U CubeSat is found appropriate. Currently ground sensors are foreseen to transmit data in VHF band. However based on recent developments, a transmission at 920 MHz is also of interest.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"341 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":"115171217","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

Component selection for magnetic attitude subsystem of PNSS-1 small satellite PNSS-1小卫星磁姿态分系统部件选择

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002959

M. Noman, Syed M. Zulqamain, M. R. Mughal, Anwar Ali, L. Reyneri

引用次数: 3

On-board software for HAVELSAT cubesat HAVELSAT立方体卫星的机载软件

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8002976

Ismail Arslan, Kamil Arslankoz, A. Telli, B. Karabulut, A. Aslan

引用次数: 2

Designing microwave absorber shape by using optimization 用最优化方法设计微波吸收器形状

2017 8th International Conference on Recent Advances in Space Technologies (RAST) Pub Date : 2017-06-01 DOI: 10.1109/RAST.2017.8003004

I. Catalkaya, S. Kent

{"title":"Designing microwave absorber shape by using optimization","authors":"I. Catalkaya, S. Kent","doi":"10.1109/RAST.2017.8003004","DOIUrl":"https://doi.org/10.1109/RAST.2017.8003004","url":null,"abstract":"Microwave absorbers are used inside of anechoic chamber along its wall, ceiling and floor to perform EMC / EMI measurements. Anechoic chambers are also used to perform measurements for EMC / EMI requirements of spacecraft on-orbit. Wedge and pyramidal type absorbers are commonly used type of absorbers to cover chamber walls. Shape of them is one of major factor to absorb energy of incident EM wave. New absorber shapes can help to improve absorption performance of absorbers and provide accuracy of measurements. In this study, an alternative microwave absorber shape is obtained by using optimization methods. Reflection characteristic of new designed absorber is presented. Absorber is analyzed by using Periodic Moment Method (PMM). 2–10 GHz frequency band is considered for reflection value calculations of absorber. TM mode normal incidence case electromagnetic waves are employed for the calculations within the 2–10 GHz frequency band. Bistatic pattern characteristics of absorber are presented at 2, 4, and 6 GHz. Using optimization methods to obtain optimized power function shaped absorber is an important contribution of the study.","PeriodicalId":434418,"journal":{"name":"2017 8th International Conference on Recent Advances in Space Technologies (RAST)","volume":"113 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":"117292733","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