Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208427
I. Bekmezci, Eyup Emre Ulku
Communication is an important problem in Multi Unmanned Air Vehicle (UAV) systems. Flying Ad Hoc Network (FANET) structure provides a solution to communication problem of multi UAVs but in FANET structure, UAVs need to know location information of other UAVs to provide secure flight. For this reason, Location Information Sharing (LIS) is the most important challenges in FANETs. Token circulation schema is one of the solution method for LIS In this method, the exchange of location information between UAVs is performed by circulating a token in FANET. In the literature, token circulation is handled to provide code distribution and in these studies only one token is used for code delivery with the limited number of U A Vs. However, location information is much longer than the code delivery information. Therefore, LIS with token circulation takes more time than the code delivery. In addition to this if a large number of UAVs are found in FANET, size of the token will increase and this situation also cause the more delay for token circulation. The number of UAVs increases, the LIS with a single token circulation in FANET will take longer time. In this case seamless flight is not be possible in multi UAV systems. In order to achieve LIS with minimum delay, it is planned to increase the number of UAVs, and the number of tokens circulating in the network simultaneously. The aim of this study is to provide LIS with multi token circulation in FANETs.
通信是多无人机系统中的一个重要问题。飞行自组织网络(FANET)结构解决了多架无人机之间的通信问题，但在FANET结构中，无人机需要知道其他无人机的位置信息以保证安全飞行。因此，位置信息共享(LIS)是fanet中最重要的挑战。令牌循环模式是LIS的一种解决方法，该方法通过在FANET中循环令牌来实现无人机之间的位置信息交换。在文献中，代币流通是用来提供代码分发的，在这些研究中，只有一个代币用于代码交付，并且U A vs的数量有限。然而，位置信息比代码交付信息长得多。因此，具有令牌循环的LIS比代码交付花费更多的时间。除此之外，如果在FANET中发现大量的无人机，则令牌的大小会增加，这种情况也会导致令牌流通的更多延迟。随着无人机数量的增加，单代币在FANET中流通的LIS将需要更长的时间。在这种情况下，在多无人机系统中不可能实现无缝飞行。为了以最小的延迟实现LIS，计划增加无人机的数量，同时增加网络中流通的令牌数量。本研究的目的是提供LIS在fanet中的多令牌流通。
{"title":"Location information sharing with multi token circulation in Flying Ad Hoc Networks","authors":"I. Bekmezci, Eyup Emre Ulku","doi":"10.1109/RAST.2015.7208427","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208427","url":null,"abstract":"Communication is an important problem in Multi Unmanned Air Vehicle (UAV) systems. Flying Ad Hoc Network (FANET) structure provides a solution to communication problem of multi UAVs but in FANET structure, UAVs need to know location information of other UAVs to provide secure flight. For this reason, Location Information Sharing (LIS) is the most important challenges in FANETs. Token circulation schema is one of the solution method for LIS In this method, the exchange of location information between UAVs is performed by circulating a token in FANET. In the literature, token circulation is handled to provide code distribution and in these studies only one token is used for code delivery with the limited number of U A Vs. However, location information is much longer than the code delivery information. Therefore, LIS with token circulation takes more time than the code delivery. In addition to this if a large number of UAVs are found in FANET, size of the token will increase and this situation also cause the more delay for token circulation. The number of UAVs increases, the LIS with a single token circulation in FANET will take longer time. In this case seamless flight is not be possible in multi UAV systems. In order to achieve LIS with minimum delay, it is planned to increase the number of UAVs, and the number of tokens circulating in the network simultaneously. The aim of this study is to provide LIS with multi token circulation in FANETs.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128441007","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208401
M. H. Jusoh, F. Kasran, Huixin Liu, K. Yumoto
Exogenous parameter is basically referred to the external activities that may have been the important factors in modulating the atmosphere, ionosphere and the earth's surface. Due to its significant impacts, there is possibility to link solar activities and seismicity. Associated investigations have been done by previous researchers in order to explore the solar - terrestrial connection; nevertheless, the physical mechanism is still controversial. To comprehend the investigation of this coupling mechanism, we propose another exogenous source to be analyzed which is cosmic ray. As solar activity, cosmic ray also has minimum and maximum phases or called as cosmic ray cycle, but it is anti-correlation between phases of sunspot and cosmic ray cycles. In this brief report, we examine the trend of shallow earthquake occurrence as the caused effect during recent 4 complete solar cycles (SC 20-23) in order to study its possible link to sun spot number (SSN). The earthquakes were categorized into very shallow earthquakes with epicenter depth less than 35 km and deeper earthquakes with epicenter depth between 35-70 km. For very shallow earthquakes, the analysis shows two interesting features. First, its occurrence rate shows a steady increase during the 40 years period of 1964-2005, with average increase rate about 150/year. Second, a distinct increase of the occurrence rate occurs during each solar minimum of SC 21-23. Neither of these features is found in the earthquakes with deeper epicenters, suggesting that the solar influence on seismicity, if exists, is likely to exist only in the case of very shallow earthquakes whose epicenter is in the crust region.
{"title":"Possible correlation between exogenous parameters and seismicity","authors":"M. H. Jusoh, F. Kasran, Huixin Liu, K. Yumoto","doi":"10.1109/RAST.2015.7208401","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208401","url":null,"abstract":"Exogenous parameter is basically referred to the external activities that may have been the important factors in modulating the atmosphere, ionosphere and the earth's surface. Due to its significant impacts, there is possibility to link solar activities and seismicity. Associated investigations have been done by previous researchers in order to explore the solar - terrestrial connection; nevertheless, the physical mechanism is still controversial. To comprehend the investigation of this coupling mechanism, we propose another exogenous source to be analyzed which is cosmic ray. As solar activity, cosmic ray also has minimum and maximum phases or called as cosmic ray cycle, but it is anti-correlation between phases of sunspot and cosmic ray cycles. In this brief report, we examine the trend of shallow earthquake occurrence as the caused effect during recent 4 complete solar cycles (SC 20-23) in order to study its possible link to sun spot number (SSN). The earthquakes were categorized into very shallow earthquakes with epicenter depth less than 35 km and deeper earthquakes with epicenter depth between 35-70 km. For very shallow earthquakes, the analysis shows two interesting features. First, its occurrence rate shows a steady increase during the 40 years period of 1964-2005, with average increase rate about 150/year. Second, a distinct increase of the occurrence rate occurs during each solar minimum of SC 21-23. Neither of these features is found in the earthquakes with deeper epicenters, suggesting that the solar influence on seismicity, if exists, is likely to exist only in the case of very shallow earthquakes whose epicenter is in the crust region.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128960264","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208345
O. Yilmaz, Emre Unses, Meriç Uçan, Hakan Buyuk, Muhammet Celebi, Fethi Turk, M. S. Kirik, O. Haliloglu, V. Celik, M. Ekinci, Erol Guven, Ozan Yilmaz, Derya Acar, M. F. Aydogdu, Mert Olça, O. Selimoglu
Tubitak Uzay has started a spaceborne hyperspectral imager development project two years ago. As hyperspectral remote sensing is getting popular, Tubitak Uzay has R&D projects both on hardware development and software applications of hyperspectral imaging. Project is at the PDR level now. Many trade-off cases are evaluated during the system engineering and preliminary design phases. We are presenting a summary of trade-off cases and lessons learnt during those studies. Optical, mechanical and electronical designs are also shown at the end of paper.
{"title":"Current situation on spaceborne hyperspectral imager of Tübıtak Uzay: HSK","authors":"O. Yilmaz, Emre Unses, Meriç Uçan, Hakan Buyuk, Muhammet Celebi, Fethi Turk, M. S. Kirik, O. Haliloglu, V. Celik, M. Ekinci, Erol Guven, Ozan Yilmaz, Derya Acar, M. F. Aydogdu, Mert Olça, O. Selimoglu","doi":"10.1109/RAST.2015.7208345","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208345","url":null,"abstract":"Tubitak Uzay has started a spaceborne hyperspectral imager development project two years ago. As hyperspectral remote sensing is getting popular, Tubitak Uzay has R&D projects both on hardware development and software applications of hyperspectral imaging. Project is at the PDR level now. Many trade-off cases are evaluated during the system engineering and preliminary design phases. We are presenting a summary of trade-off cases and lessons learnt during those studies. Optical, mechanical and electronical designs are also shown at the end of paper.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124760677","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208396
E. Kalafatoglu, Z. Kaymaz, A. Moral, R. Çağlar
We present our preliminary results for the ground level electric and magnetic field variations in Turkey using Bozcaada station (GEO: 39.500N, 26.020E, MAG: 40.370N, 26.030E) magnetotelluric measurements. We find that our quiet day observations agree well with the expected magnetic field variations for the magnetic field components at mid-latitudes, whereas we detect deviations from the mean magnetic field even for minor geomagnetic disturbances with KP=2. Temporal variation of the electric field components follow the changes in the magnetic field strength and likewise, storm effects are evident and lead to higher level of fluctuations in electric field magnitude for events with KP≥2. We note that this is the first time in Turkey that systematic, continuous and simultaneous measurements of the magnetic and electric fields are performed, which provide a great deal of opportunity to study the GIC effects during geomagnetic storms at mid-latitudes in more detail.
{"title":"Geomagnetically induced current (GIC) observations of geomagnetic storms in Turkey: Preliminary results","authors":"E. Kalafatoglu, Z. Kaymaz, A. Moral, R. Çağlar","doi":"10.1109/RAST.2015.7208396","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208396","url":null,"abstract":"We present our preliminary results for the ground level electric and magnetic field variations in Turkey using Bozcaada station (GEO: 39.500N, 26.020E, MAG: 40.370N, 26.030E) magnetotelluric measurements. We find that our quiet day observations agree well with the expected magnetic field variations for the magnetic field components at mid-latitudes, whereas we detect deviations from the mean magnetic field even for minor geomagnetic disturbances with KP=2. Temporal variation of the electric field components follow the changes in the magnetic field strength and likewise, storm effects are evident and lead to higher level of fluctuations in electric field magnitude for events with KP≥2. We note that this is the first time in Turkey that systematic, continuous and simultaneous measurements of the magnetic and electric fields are performed, which provide a great deal of opportunity to study the GIC effects during geomagnetic storms at mid-latitudes in more detail.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123830808","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208404
S. Nasseri, M. Emanuelli
One of the main threats facing the future of space exploration and utilization is a reduction in safety and sustainable use of space. The increasing number of space debris and their potential impact with space systems is a major threat for space missions. A disaster in space can lead to a reduced public support for space missions and stop continued space exploration. In recognition of the importance of this topic, the Space Generation Advisory Council started a project group in 2009 to focus on the area of Space Safety and Sustainability, with the aim of reflecting the view of the young generation in this area. This paper summarizes some of the activities and findings of the aforementioned project group in its fifth anniversary. It also provides an overview of new projects being initiated within the project group for the year 2015.
{"title":"SGAC space safety and sustainability project group — Reflecting the views of the next generation for five years","authors":"S. Nasseri, M. Emanuelli","doi":"10.1109/RAST.2015.7208404","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208404","url":null,"abstract":"One of the main threats facing the future of space exploration and utilization is a reduction in safety and sustainable use of space. The increasing number of space debris and their potential impact with space systems is a major threat for space missions. A disaster in space can lead to a reduced public support for space missions and stop continued space exploration. In recognition of the importance of this topic, the Space Generation Advisory Council started a project group in 2009 to focus on the area of Space Safety and Sustainability, with the aim of reflecting the view of the young generation in this area. This paper summarizes some of the activities and findings of the aforementioned project group in its fifth anniversary. It also provides an overview of new projects being initiated within the project group for the year 2015.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"23 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113934869","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208349
N. Minallah, Hidayat ur Rahman, Rehanullah Khan, A. Alkhalifah, Shahbaz Khan
Land usage analysis takes advantage of the multi-band imagery for classification and recognition. Multi-bands data contains reliable information compared to the raw image formats e.g. RGB, HIS, HSV and other color spaces. In this paper, we advocate the usage of non-parametric machine learning algorithms for land usage analysis. From the non-parametric algorithms, we propose a random forest approach for land use analysis. Our analysis is concerned with the classification of land into seven classes. We have shown that non-parametric classifier the “Random Forest” is well suited to the task of multi-band land usage analysis. In the experimentation setup, we have compared the random forest with the state-of-the-art classifiers. Based on the SPOT-5 imagery, we have shown that the random forest outperforms the state-of-the-art classifiers including Naïve Bayesian, Mutli-Layer Perceptron, Bayesian Network, SVM, Radial Basis Function Network (RBF) and Ada-boost. We further show that for the land use analysis, increasing the number of trees has no effect on the performance of the random forest and therefore the runtime of the random forest can be reduced compare to all the other classifiers. The best F-score is achieved using 4 trees and 10 Fold Cross Validation.
{"title":"Land usage analysis: A random forest approach","authors":"N. Minallah, Hidayat ur Rahman, Rehanullah Khan, A. Alkhalifah, Shahbaz Khan","doi":"10.1109/RAST.2015.7208349","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208349","url":null,"abstract":"Land usage analysis takes advantage of the multi-band imagery for classification and recognition. Multi-bands data contains reliable information compared to the raw image formats e.g. RGB, HIS, HSV and other color spaces. In this paper, we advocate the usage of non-parametric machine learning algorithms for land usage analysis. From the non-parametric algorithms, we propose a random forest approach for land use analysis. Our analysis is concerned with the classification of land into seven classes. We have shown that non-parametric classifier the “Random Forest” is well suited to the task of multi-band land usage analysis. In the experimentation setup, we have compared the random forest with the state-of-the-art classifiers. Based on the SPOT-5 imagery, we have shown that the random forest outperforms the state-of-the-art classifiers including Naïve Bayesian, Mutli-Layer Perceptron, Bayesian Network, SVM, Radial Basis Function Network (RBF) and Ada-boost. We further show that for the land use analysis, increasing the number of trees has no effect on the performance of the random forest and therefore the runtime of the random forest can be reduced compare to all the other classifiers. The best F-score is achieved using 4 trees and 10 Fold Cross Validation.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131522988","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208458
M. Uludağ, M. E. Baş, M. O. Gulbahce, D. Kocabas, A. Aslan
A voltage multiplier (DC-DC converter) is tested in simulated space environment to establish a benchmark result for further studies. The literature includes a variety of methods to design such systems; however, test results are very rare.
{"title":"Thermal vacuum chamber test of a DC-DC converter","authors":"M. Uludağ, M. E. Baş, M. O. Gulbahce, D. Kocabas, A. Aslan","doi":"10.1109/RAST.2015.7208458","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208458","url":null,"abstract":"A voltage multiplier (DC-DC converter) is tested in simulated space environment to establish a benchmark result for further studies. The literature includes a variety of methods to design such systems; however, test results are very rare.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"474 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133039952","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208455
Emre Baceski, Serhan Gokcebag, A. Erdem, Caban Gokhan Erbay, M. Akyol, Kamil Arslankoz, Ismail Arslan, Muhammed Akif Ağca, Yusuf Burak Aydin, A. Aslan, O. Ceylan
Despite the small amount of available volume, CubeSat missions have proven to be quite useful, especially for scientific data gathering, educational purposes and small scale industrial equipment testing. The aim of this article is to discuss the design principles and project goals of a CubeSat that is part of the QB50 project. HAVELSAT is a double-unit CubeSat with one functional and one scientific unit. The scientific payload of HAVELSAT is a Software Defined Radio for communication. The satellite also performs a small scale onboard image processing.
{"title":"HAVELSAT: A software defined radio experimentation CubeSat","authors":"Emre Baceski, Serhan Gokcebag, A. Erdem, Caban Gokhan Erbay, M. Akyol, Kamil Arslankoz, Ismail Arslan, Muhammed Akif Ağca, Yusuf Burak Aydin, A. Aslan, O. Ceylan","doi":"10.1109/RAST.2015.7208455","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208455","url":null,"abstract":"Despite the small amount of available volume, CubeSat missions have proven to be quite useful, especially for scientific data gathering, educational purposes and small scale industrial equipment testing. The aim of this article is to discuss the design principles and project goals of a CubeSat that is part of the QB50 project. HAVELSAT is a double-unit CubeSat with one functional and one scientific unit. The scientific payload of HAVELSAT is a Software Defined Radio for communication. The satellite also performs a small scale onboard image processing.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124166037","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208446
Y. Ariyoshi, Melissa Zemoura, T. Hanada, Satomi Kawamoto
The number of small satellites as those that do not exceed 50kg is rapidly increasing in the low-Earth orbit region. Since the orbital debris mitigation guidelines released by United Nations, Inter-Agency Space Debris Coordination Committee and national space agency does not consider small satellites and typical large satellites separately, small satellites also should conduct post-mission disposal. However most small satellites are launched as piggyback satellites, affordable post-mission disposal of small satellites is different from that of typical large satellites, and this post-mission disposal of small satellites may cause the collisions to other satellites. For developers of small satellites, this paper reviews the effect of small satellites post-mission disposal on sustainable space utilization, which was presented by the authors in previous.
{"title":"Effect of small satellites' post-mission disposal on sustainable space utilization","authors":"Y. Ariyoshi, Melissa Zemoura, T. Hanada, Satomi Kawamoto","doi":"10.1109/RAST.2015.7208446","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208446","url":null,"abstract":"The number of small satellites as those that do not exceed 50kg is rapidly increasing in the low-Earth orbit region. Since the orbital debris mitigation guidelines released by United Nations, Inter-Agency Space Debris Coordination Committee and national space agency does not consider small satellites and typical large satellites separately, small satellites also should conduct post-mission disposal. However most small satellites are launched as piggyback satellites, affordable post-mission disposal of small satellites is different from that of typical large satellites, and this post-mission disposal of small satellites may cause the collisions to other satellites. For developers of small satellites, this paper reviews the effect of small satellites post-mission disposal on sustainable space utilization, which was presented by the authors in previous.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114457897","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}
Pub Date : 2015-06-16DOI: 10.1109/RAST.2015.7208373
E. Cinar, O. Turhan
The purpose of a command and data handling subsystem of a spacecraft is to ensure that an autonomous control of spacecraft functions is maintained. This must be achieved in order to receive, validate, decode, and distribute commands to other spacecraft subsystems and gather, process, and format spacecraft housekeeping and mission data from all spacecraft subsystems for downlink and use by on-board computer (OBC). Therefore, command and data handling subsystem becomes the brain of the satellite and its reliability, efficiency, autonomy, redundancy and sizing affect all subsystems of spacecraft. This paper describes the details of the command and data handling subsystem of GÖKTÜRK-2 Flight Model. Technical descriptions of each component with their interfaces are presented including their data links. The operational workflow of the subsystem is also presented to show how BiLGE OBC accomplishes this important task by using its software task architecture.
{"title":"Command and data handling subsystem of GÖKTÜRK-2 flight model","authors":"E. Cinar, O. Turhan","doi":"10.1109/RAST.2015.7208373","DOIUrl":"https://doi.org/10.1109/RAST.2015.7208373","url":null,"abstract":"The purpose of a command and data handling subsystem of a spacecraft is to ensure that an autonomous control of spacecraft functions is maintained. This must be achieved in order to receive, validate, decode, and distribute commands to other spacecraft subsystems and gather, process, and format spacecraft housekeeping and mission data from all spacecraft subsystems for downlink and use by on-board computer (OBC). Therefore, command and data handling subsystem becomes the brain of the satellite and its reliability, efficiency, autonomy, redundancy and sizing affect all subsystems of spacecraft. This paper describes the details of the command and data handling subsystem of GÖKTÜRK-2 Flight Model. Technical descriptions of each component with their interfaces are presented including their data links. The operational workflow of the subsystem is also presented to show how BiLGE OBC accomplishes this important task by using its software task architecture.","PeriodicalId":282476,"journal":{"name":"2015 7th International Conference on Recent Advances in Space Technologies (RAST)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117040130","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}
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