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

Effect of Strong Solar Flare Events on the Geomagnetic Equatorial Region During Solar Cycle-24 太阳活动周期24期间强太阳耀斑事件对地磁赤道区的影响

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768767

Raja Adibah Raja Halim Shah, Nuurl Shazana Abdul Hamid, A. Yoshikawa

引用次数: 1

Oil Spill Impacts on Mangrove Forest from Satellite Remote Sensing 从卫星遥感看溢油对红树林的影响

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768774

Siti Sarah Farhana Ahmad, Nurul Hazrina Idris

{"title":"Oil Spill Impacts on Mangrove Forest from Satellite Remote Sensing","authors":"Siti Sarah Farhana Ahmad, Nurul Hazrina Idris","doi":"10.1109/iconspace53224.2021.9768774","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768774","url":null,"abstract":"The mangrove forest has been continuously threatened by oil spills occurring on the sea surfaces. The oil spills pose and cause severe and long-term effect havoc on mangrove forests that sustain them. Previous research has found that satellite remote sensing technologies are one of the most effective techniques to detect oil spills and assess the health of mangrove forests in contaminated areas. This study utilized the Synthetic-Aperture Radar (SAR) images from dualpolarized Sentinel-1 and Multi-Spectral Instrument (MSI) from Sentinel-2 to study the impact of oil spills on Mangrove Forest in Pantai Cermin, Negeri Sembilan. The Random Forest classification was used to detect the oil spill areas, while vegetation indices were used to assess the impact of oil pollution on mangrove forests in the early stages. Analysis from Sentinel1 imagery shows that the oil spill could be accurately detected using the Random Forest classifer with accuracy of 76%. Spectral indices: the normalized difference vegetation index (NDVI) was explored and evaluated to study the health of mangrove forest after the oil spills event. It is found that the oil spills have caused physical suffocation as well as toxicological effects to the mangrove forests.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"15 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":"114186935","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

Elliptical Slot Metasurface High Gain Microstrip Line Antenna for Sub-6 GHz 5G Wireless Communication 用于6 GHz以下5G无线通信的椭圆槽超表面高增益微带线天线

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768762

M. L. Hakim, T. Alam, N. Sahar, N. Misran, M. F. Mansor

引用次数: 3

Ionospheric Storm Caused in 2015 by Intense Geomagnetic Storms over Metro Manila, Philippines 2015年由菲律宾马尼拉大都会强烈地磁风暴引起的电离层风暴

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768676

J. Kalaw, E. Macalalad, R. M. Guido, P. Tucio, P. P. Divinagracia

{"title":"Ionospheric Storm Caused in 2015 by Intense Geomagnetic Storms over Metro Manila, Philippines","authors":"J. Kalaw, E. Macalalad, R. M. Guido, P. Tucio, P. P. Divinagracia","doi":"10.1109/iconspace53224.2021.9768676","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768676","url":null,"abstract":"The 2015 intense geomagnetic storms were significant event in relatively weaker solar cycle 24. In this paper, we explored the impacts of the 2015 intense geomagnetic storms and the response of the ionosphere over Metro Manila, Philippines. We obtained the data from the World Data System for Geomagnetism, Kyoto for the Kp and Dst indices; Space Radiation Lab at California Institute of Technology (SRL-CalTech) for the solar wind speed (vsw) collected by the Solar Wind Electron, Proton, and Alpha Monitor (SWEPAM) and the Advanced Composition Explorer (ACE) magnetometer for the Bz (nT) values. The total electron content was obtained from a GNSS station (PIMO) in Quezon City, Philippines, through the International Centre for Theoretical Physics (ICTP) web service. The quiet days were also acquired from the same site. Our investigation have shown that the ionosphere over the PIMO station depletes its electron density (negative storm) after reaching the minimum (during the recovery phase) and will remain for at least ~20 hours. Contrary to the CME-driven storm, the CIR-induced event in October 2015 produced negative storm (with very few and weak positive). Our results were mostly consistent with the time delay on the occurrence of a negative storm. In addition, a greater Dst minimum does not guarantee the type of storm and further analysis is required.","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":"130388213","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

The Climate in West Peninsular Malaysia: Rain Attenuation Depth during Northeast Monsoon 马来西亚西半岛的气候:东北季候风期间的降雨衰减深度

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768313

Fazdliana Samat, M. Singh, A. Sali

{"title":"The Climate in West Peninsular Malaysia: Rain Attenuation Depth during Northeast Monsoon","authors":"Fazdliana Samat, M. Singh, A. Sali","doi":"10.1109/iconspace53224.2021.9768313","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768313","url":null,"abstract":"The atmospheric condition is a crucial element during the propagation of a signal from a satellite to the earth. The troposphere layer containing the precipitation is affected more and deteriorates the signal from 20 dB (Ku Band) to 80 dB (Ka-Band). Therefore, the study on rainfall patterns throughout the years is important to get the industry players to dictate the appropriate attenuation margin accordingly because of the current climate change. This paper highlighted the rainfall analysis at the Puncak Niaga, Putrajaya, and Taman Desa Kundang, Rawang, of West Peninsular Malaysia in the year of 2014 to 2018. The lowest rainfall volume was occurred in February, with the accumulation of 386.8 mm in Putrajaya, and 395.2 in Rawang for five consecutive years. The wettest month was in Northeast Monsoon, which was in November. The accumulation of rainfall in Rawang shows the highest amount than in Putrajaya. The highest rain intensities were in November 2014, which amounted to 145 mm/h, and the average five years rain intensities at Rawang amounted to 84 mm/h for 0.01% of outage time were used as input to ITU-R P.618-13 rain attenuation prediction model. The result suggested different values, wherein 46.19 dB and 33.88 dB respectively. Therefore, a trade-off between quality of signal could be concluded in this experiment wherein the month of Northeast Monsoon would experience more outage time if the averaged five years rain intensity-induced attenuation margin would be used. A trade-off between user satisfaction and operational cost will be left to the satellite operators to consider.","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":"130060475","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

Dual-band Metamaterial Absorber for Ka-Band Satellite Application ka波段卫星中双频超材料吸收器的应用

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768692

Ahmad Musa, M. L. Hakim, T. Alam, M. Baharuddin, Mandeep S. J. Singh

引用次数: 1

Comparison between Oxygen (dry) and Water Vapour (wet) Attenuation from an Airborne Platform to Satellite in Nigeria 尼日利亚机载平台到卫星的氧(干)和水蒸气(湿)衰减比较

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768710

O. J. Adeyemi, T. Omotosho, S. A. Akinwumi, T. E. Arijaje, O. O. Ometan, O. Fashade

{"title":"Comparison between Oxygen (dry) and Water Vapour (wet) Attenuation from an Airborne Platform to Satellite in Nigeria","authors":"O. J. Adeyemi, T. Omotosho, S. A. Akinwumi, T. E. Arijaje, O. O. Ometan, O. Fashade","doi":"10.1109/iconspace53224.2021.9768710","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768710","url":null,"abstract":"Aeronautical applications have become very important in supporting communications for in-flight entertainment and in-flight connectivity services. As the local aircraft is moving from one location to the other at higher altitudes between 6 – 8 km above the sea level, the link between airborne platform and satellite undergoes signal degradation which affects internet connection for the passenger. However, cloud and gases are major tropospheric effects that cause attenuation above rain height of 5 km for radio wave propagation most importantly microwave signals for an airborne platform to space communication in the Ku and above. Therefore, the analysis and prediction of the airborne-satellite path links of gas and cloud attenuation is essential, hence the importance of this research. An historical radiosonde data obtained from National Oceanic and Atmospheric Administration (NOAA) covering three locations in Nigeria; Abuja (2006-2018), Ikeja (1966-2019), and Kano (1972-2019) at an elevation angles of 48.5 ˚, 44.5 ˚ and 48.8 ˚ respectively were used for this research. The total attenuation at V-band, both uplink and downlink frequencies follow the same pattern; at Abuja station in 2007 the total attenuation is about 2.6053 dB at 50 GHz and 0.7487 dB at 40 GHz while at Ikeja station in 1961 the total attenuation is about 3.7882 dB at 50 GHz and 1.0575 dB at 40 GHz and finally at Kano station in 1990 the total attenuation is about 5.7119 dB at 50 GHz and 1.4881 dB at 40 GHz. Hence, the results can be useful for the Nigeria meteorological Agency (NIMET) and the Nigeria Civil Aviation Authority (NCAA) in planning for a more efficient airborne – space communication for aviation safety, in-flight connectivity (IFC) and in-Flight entertainment (IFE).","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"6 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":"121914101","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

Very High Spatiotemporal EO Monitoring of Vegetation Change 植被变化的甚高时空观测监测

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768755

Refiz Duro

{"title":"Very High Spatiotemporal EO Monitoring of Vegetation Change","authors":"Refiz Duro","doi":"10.1109/iconspace53224.2021.9768755","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768755","url":null,"abstract":"We investigate the potential benefits of combining very high resolution (VHR) Earth observation (EO) images with near hourly temporal resolution for forest watch, covering monitor and detection activities for wildfire and illegal deforestation response. We apply standard Normalized Difference Vegetation Index (NDVI) to pansharpened multispectral images of WorldView-3 collected on several occasions in the year 2019 and compare the level of details to EO Sentinel-2 images. The latter have lower spatial resolution, however, this is the standard resolution for several forest watch services currently in use. We investigate a monitoring mechanism to enable quick detection of vegetation level change using wide-coverage, very high spatial resolution satellite images that can provide temporal coverage on an hourly-basis. With deforestation in any form (legal, illegal or wildfire caused) being a global problem with a far-reaching impact on, e.g., human health, plant and animal life and climate change, an improvement with a quicker and more detailed operational picture should be easily integrable in the existing forest watch services.","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":"129460544","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

Examination of Solar Flare Monitoring using a Low Cost VLF Receiver 使用低成本VLF接收器监测太阳耀斑的研究

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768776

S. Bahari, Nurul Shazana Abdul Hamid, Mardina Abdullah, S. Abdullah

引用次数: 0

Performance Analysis of Rectangular Microstrip Patch Antenna with Different Substrate Material at 2.4 GHz for WLAN Applications 2.4 GHz下不同衬底材料矩形微带贴片天线的性能分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768753

Zhou Fei, N. Ramli, P. L. Jethi, Taher Khalifa Sanossi, N. A. Abd Rahman

{"title":"Performance Analysis of Rectangular Microstrip Patch Antenna with Different Substrate Material at 2.4 GHz for WLAN Applications","authors":"Zhou Fei, N. Ramli, P. L. Jethi, Taher Khalifa Sanossi, N. A. Abd Rahman","doi":"10.1109/iconspace53224.2021.9768753","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768753","url":null,"abstract":"This paper presents the design and analysis of a rectangular microstrip patch antenna using two different substrates material that are FR-4 and RT-Duroid 5880. The aim of this paper is to compare both the antennas performance based on different substrate materials. The dielectric constant of εr = 4.6, and a thickness of h = 1.6 mm was used for the FR-4 substrate. The RT-Duroid 5880 had a dielectric constant of εr = 2.2 with a thickness of h = 0.787 mm. Both of these antennas were fed by a 50Ω microstrip feeding line which was operated at a frequency of 2.4GHz for Wireless Local Area Network (WLAN) applications. A Computer Simulation Technology (CST) Studio Suite 2020 software was used to simulate and analyze the performances of both the antennas. Both of the antennas were fabricated and measured to determine the performance of the antennas. Based on the analysis, it was found that the optimum design was RT-Duroid 5880 substrate material. The gains of RT-Duroid 5880 was 50% higher than FR-4 material where the simulated gains were 6.927 dBi and measured gains of 6.2 dBi respectively. The efficiency of RT-Duroid 5880 was good at 69.1 % when compared to FR-4 which was only 42.9 %. The simulation results showed good performance in terms of bandwidth, gains, efficiency, and radiation pattern, especially for RT-Duroid 5880 substrate material.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"252 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":"132155266","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