2021 7th International Conference on Space Science and Communication (IconSpace)最新文献_第6页

DP-QPSK for Optical Inter-Satellite Links in a Broadband Constellation Network 宽带星座网络中星间光链路DP-QPSK

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768691

Amrita Gill, G. Gnanagurunathan, Nafizah Khan, A. Malekmohammadi

{"title":"DP-QPSK for Optical Inter-Satellite Links in a Broadband Constellation Network","authors":"Amrita Gill, G. Gnanagurunathan, Nafizah Khan, A. Malekmohammadi","doi":"10.1109/iconspace53224.2021.9768691","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768691","url":null,"abstract":"This paper presents a spectral efficient dual polarization quadrature phase shift keying (DP-QPSK) modulation format in an optical inter-satellite link (OISL). The model is simulated to operate in a low Earth orbit (LEO) satellite broadband constellation network. Its’ performance is analyzed and compared to the QPSK and the non-return to zero (NRZ) intensity modulation format for ISL distances of 1000 km to 6000 km. At a bit rate of 20 Gbps, the DP-QPSK and QPSK are observed to require a minimum transmitter laser power of 27 dBm at the maximum LEO OISL distance of 6000 km whereas the NRZ requires 37 dBm. The DP-QPSK is further observed to be the more spectral efficient modulation format of the three. Keeping to a bit-error rate (BER) of 10-9 and at a constant transmitter power of 30 dBm, the DP-QPSK and QPSK sustains the maximum LEO OISL distance whilst the NRZ supports a link distance of 2400 km. The modelled DP-QPSK system is then simulated for a bit rate of 40 Gbps. The system is observed to double the capacity of the QPSK at a constant symbol rate of 10 Gbaud.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121966129","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

Prediction of TEC at low latitudes station using Neural Network model 利用神经网络模型预测低纬度台站TEC

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768759

R. M. Akir, K. Chellappan, Noraide Md Yusop, M. Abdullah, M. J. Homam

{"title":"Prediction of TEC at low latitudes station using Neural Network model","authors":"R. M. Akir, K. Chellappan, Noraide Md Yusop, M. Abdullah, M. J. Homam","doi":"10.1109/iconspace53224.2021.9768759","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768759","url":null,"abstract":"The total electron content (TEC) of the ionospheric atmosphere is frequently used in studies on ionospheric physics and the effects of space weather. This paper focuses on a feasibility study of the Neural Network (NN) model for the TEC prediction in Peninsular Malaysia which is included in low latitude region. The selection data is based on available data from Universiti Kebangsaan Malaysia (UKM) station from the year 2011 until 2015 which was the ascending solar cycle period in cycle 24. A feedforward neural network with a back propagation algorithm was proposed as a prediction model. The NN parameters were selected based on the TEC influence’s factor which were the seasonal variation, diurnal variation, and solar activity. The TEC value predicted by the NN model was evaluated using the GPS-TEC and compared to IRI01-corr TEC models result. The result shows the proposed NN model give less root mean square error (RMSE) against the IRI01-corr TEC models with the average RMSE approximately 3.58 TECU and 14.72 TECU respectively. In addition, the best prediction falls during the solstice compared to the equinox.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114752310","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

Seasonal Variation of Post-sunset and Post-midnight Equatorial Plasma Bubble in Malaysia during Moderate Solar Activity Level 中等太阳活动水平下马来西亚日落后和午夜后赤道等离子体泡的季节变化

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768743

Nur Izzati Mohd Rosli, Nurul Shazana Abdul Hamid, M. Abdullah, S. M. Buhari, I. Sarudin

引用次数: 0

The Performance of Low-Cost GPS for Observation of Ionospheric Irregularities: A Review 低成本GPS在电离层不规则观测中的性能综述

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768716

Mohd Azrol Azahar, Mohd Hezri Mokhtar, Nurliyana Abdul Rahim

引用次数: 0

G Loaded Complementary Split Square Ring Resonator-Based SNG Metamaterial for Wi-Fi, IoT & Satellite Applications 用于Wi-Fi，物联网和卫星应用的基于G负载互补分割方环谐振器的SNG超材料

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768678

Md. Rashedul Islam, B. Bais, Md. Samsuzzaman, Md. Zulfiker Mahmud, H. Arshad, N. Sahar, Mandeep S. J. Singh

{"title":"G Loaded Complementary Split Square Ring Resonator-Based SNG Metamaterial for Wi-Fi, IoT & Satellite Applications","authors":"Md. Rashedul Islam, B. Bais, Md. Samsuzzaman, Md. Zulfiker Mahmud, H. Arshad, N. Sahar, Mandeep S. J. Singh","doi":"10.1109/iconspace53224.2021.9768678","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768678","url":null,"abstract":"In this study, a novel miniaturized G-inspired complementary split square ring resonator-based single negative (SNG) metamaterial (MTM) has been developed for wireless fidelity (Wi-Fi), internet of thing (IoT), and Satellite applications. Commercially available user-friendly computer simulation technology (CST-2019) electromagnetic simulator was used for the layout design and detailed analysis of the produced structure. The MTM unit cell size is 8×8 mm2, and it is integrated on a Rogers RO4350B dielectric substrate. A high effective medium ratio (EMR) is obtained from this structure; the value of it is 15.63. The effective medium parameters were extracted using the Nicolson-Ross-Weir (NRW) approach. To design the recommended MTM, various parametric studies have been done. Over a wide frequency range, the constructed structure has negative permittivity and also the negative refractive index. The obtained transmission coefficient (S21) resonance frequencies are 2.40, 4.18, 6.57, and 10.36 GHz, which covers S-, C-, and X- bands. Since the size of the designed cell is small, high EMR, desired resonance frequency, and the maximum band have been found; hence it can be used in Wi-Fi, IoT, and satellite applications.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131241508","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

Multipath Analysis at Low-Latitude GNSS Stations around Suvarnabhumi Airport, Thailand, for GBAS Standards 泰国素万那普机场附近低纬度GNSS站的GBAS标准多径分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768765

J. Budtho, P. Supnithi, S. Saito, Nattapong Siansawasdi, Apitep Saekow

{"title":"Multipath Analysis at Low-Latitude GNSS Stations around Suvarnabhumi Airport, Thailand, for GBAS Standards","authors":"J. Budtho, P. Supnithi, S. Saito, Nattapong Siansawasdi, Apitep Saekow","doi":"10.1109/iconspace53224.2021.9768765","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768765","url":null,"abstract":"The characteristics of the local area positioning error sources are important for Ground-Based Augmentation System (GBAS) service planning. Accurate standard deviation models are required for prior simulation of the performance of the aircraft precision landing system. The multipath standard deviation of the pseudo-range errors model is used in GBAS for each satellite elevation angle. This standard model is generated by collecting the multipath conditions from airports. However, some airports have different characteristics of the multipath effects than the others, resulting in inaccurate error models when applied to the GBAS operations. Therefore, in this work, we study and analyze a 1-dimensional curve-fitted model for the multipath error models at three GNSS stations near the Suvarnabhumi International Airport, Thailand. The results show that in the case that the multipath errors are distributed equally at each azimuth angle, the RMSEs are reduced from 0.1 to 0.02 meters near the 90-degree elevation angle and less than 0.05 meters at other degrees. For the AER1 station, located on the airport runway, in which the multipath errors are not distributed equally at each azimuth, the maximum RMSE, is less than 0.08 meters when compared with 0.14 meters from the GBAS model.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115274008","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

Observation on Geomagnetic Field from MAGDAS (PEN) and INTERMAGNET (DAL) Stations in Equatorial Region 赤道地区MAGDAS (PEN)和INTERMAGNET (DAL)站地磁场观测

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768740

S. Selvakone, S. H. Md Yusoff, N. A. M. Mohamad Rizal, N. Zakaria, A. Yoshikawa, T. Uozumi, S. Abe

{"title":"Observation on Geomagnetic Field from MAGDAS (PEN) and INTERMAGNET (DAL) Stations in Equatorial Region","authors":"S. Selvakone, S. H. Md Yusoff, N. A. M. Mohamad Rizal, N. Zakaria, A. Yoshikawa, T. Uozumi, S. Abe","doi":"10.1109/iconspace53224.2021.9768740","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768740","url":null,"abstract":"International Real-Time Magnetic Observatory Network (INTERMAGNET) and Magnetic Data Acquisition System (MAGDAS) are ground-based magnetometer networks developed to study the space weather and monitor the geomagnetic variations. A MAGDAS-II type magnetometer was installed at Penang recently for seismic monitoring. The MAGDAS (PEN) station is newly established, the reliability of the magnetometer had to be tested. The test is conducted by comparing its data with geomagnetic data obtained from another well-established magnetometer system. Therefore, this research is conducted to study the reliability of the newly installed MAGDAS system by comparing geomagnetic data with the INTERMAGNET system. The closest INTERMAGNET station that was chosen for this study is Dalat, Vietnam. The available data from November 2019 to July 2020 are selected to analyse the geomagnetic components H, D, and Z variations obtained from both stations. The result of the variations will be discussed briefly in the result and discussion part of this paper. The variations of the geomagnetic component of the newly installed MAGDAS magnetometer are verified to be reliable data for the geomagnetic field monitoring.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114716976","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

Thermal Satellite Imagery Analysis and Emissivity Characteristics for the Prediction of Oil Reservoirs Existence 热成像卫星图像分析及发射率特征预测油藏存在

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768709

Ali Badri Tarish, A. Sali, A. R. Mohamed Shariff, M. Hanafi, A. Ismail, I. A. Mohammed

{"title":"Thermal Satellite Imagery Analysis and Emissivity Characteristics for the Prediction of Oil Reservoirs Existence","authors":"Ali Badri Tarish, A. Sali, A. R. Mohamed Shariff, M. Hanafi, A. Ismail, I. A. Mohammed","doi":"10.1109/iconspace53224.2021.9768709","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768709","url":null,"abstract":"Simultaneous transformation of natural land cover contributes significantly to changing the surface phenomena making accurate forecasting difficult. Ground surveys would permit Land Use Land Cover (LULC) classification, but they are burdensome, expensive, and time-consuming and lacks accuracy in the exploration for all target areas at the same time, which highlights satellite imagery an evident and preferred alternative. A new mathematical method has been used for calculating the highest and lowest Land Surface Temperature (LST) to improve model accuracy for a particular location and detect oil seep-induced alteration from Landsat Data Continuity Mission (LDCM). Two sites within different patterns were chosen to represent a diversity of thermal anomalies positions in the study area. The results show that there are no traces of oil in either zone 1 lies which in the Kanoya province and zone 2 located east of the coast of Kagoshima which is overlooking the Pacific Ocean. In the end, the night-time scenes of the Thermal Infrared Sensor (TIRS) achieve a high gain of the thermal image with radiance 3.2-12.65 (Watts/m2 sr μm). Moreover, the analysis of the (TIRS) image is an optimal explanation for geomorphology and subsurface geology in southern Japan via the potentiality of the simulators set.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128605022","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

Focal Region Ray Tracing of Dieletric Lens Antenna for Multi Beam Applications 多波束介质透镜天线的焦点区域光线跟踪

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768733

F. Ansarudin, Y. Yamada, T. A. Rahman, K. Kamardin, N. Rahman

引用次数: 1