2021 7th International Conference on Space Science and Communication (IconSpace)最新文献_第3页

Ionospheric Precursor Associated to the 2012 Sumatra Earthquake Observed over the Taiwan-Philippines Region using GNSS-TEC GNSS-TEC对2012年台湾-菲律宾地区苏门答腊地震电离层前兆的观测

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768729

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

{"title":"Ionospheric Precursor Associated to the 2012 Sumatra Earthquake Observed over the Taiwan-Philippines Region using GNSS-TEC","authors":"P. Tucio, E. Macalalad, R. M. Guido, J. Kalaw, P. P. Divinagracia","doi":"10.1109/iconspace53224.2021.9768729","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768729","url":null,"abstract":"The seismo-ionospheric coupling relationship has been analyzed and investigated in this study. Geomagnetic activity, disturbance time (Dst) index, and Kp index were acquired from OMNIWeb Data Explorer. From March 1 to April 13, 2012. The total electron content was archived from the three GNSS-IGS station; PIMO station in Quezon City, Philippines, TWTF station at Taoyuan, Taiwan and TMNL station from Hsinchu, Taiwan from the measurement of the International Centre for Theoretical Physics (ICTP). In order to eliminate the influence of the geomagnetic storm, we used the sliding interquartile range method. This paper observed that variations exhibited positive ionospheric TEC anomalies on the 6th and 14th day before the Sumatra earthquake. We found that the observed positive TEC anomalies on the 6th and 14th day by three stations were most likely caused by the Sumatra earthquake after removing ionospheric abnormalities induced by magnetic storms. In other words, the obvious TEC anomalies observed may be considered precursors to this earthquake.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"35 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":"121617792","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 effects of X-class solar flare monitored by ground-based GPS receivers 由地面GPS接收器监测的x级太阳耀斑的影响

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768742

Nurliyana Abdul Rahim, Mohd Hezri Mokhtar, Muhammad Raziq Mohd Rosli, Mardina Abdullah, S. Bahari

{"title":"The effects of X-class solar flare monitored by ground-based GPS receivers","authors":"Nurliyana Abdul Rahim, Mohd Hezri Mokhtar, Muhammad Raziq Mohd Rosli, Mardina Abdullah, S. Bahari","doi":"10.1109/iconspace53224.2021.9768742","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768742","url":null,"abstract":"In this investigation, we present and discuss the observations of two X-class solar flares in 25 February 2014 and 19 October 2014. The solar flare events take place at the active region AR11990 and AR12192. For this investigation, we present the X-ray flux observed by geostationary operational environmental satellite (GOES) and total electron content (TEC) observations from Global Positioning System (GPS) satellites. From the collected data, it shows that quite amount of TEC observed during the solar flare events. The TEC observations for the February 25th ranged from 20 to 81 TECU, while the TEC observations for the October 19th ranged from 67 to 126 TECU. The comparison of X-ray flux data and TEC data is used to determine the responses between them. The results indicate that a solar flare begins with a dramatic increase in X-ray radiation, which correlates with a sustained increase in TEC measurements. Additionally, from the observations show that the TEC effect occurs when the X-ray flux increases exceed one hour. This work may contribute to a better understanding of the ionosphere's consequences of solar flares. Moreover, this investigation also improves the understanding of relation between TEC and X-ray flux.","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":"121802432","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

Analysis of TEC Variations in Equatorial Ionization Anomaly Crest Region Over Western China 中国西部赤道电离异常波峰区TEC变化分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768310

Fengyang Long, C. Gao, Yanfeng Dong

{"title":"Analysis of TEC Variations in Equatorial Ionization Anomaly Crest Region Over Western China","authors":"Fengyang Long, C. Gao, Yanfeng Dong","doi":"10.1109/iconspace53224.2021.9768310","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768310","url":null,"abstract":"Using the observation data of GPS stations distributed near the 103.5°E in 2017, the temporal and spatial variation characteristics of Ionospheric Total Electron Content (TEC) in the Equatorial Ionization Anomaly (EIA) north crest over Western China are studied. The results show that the peak TEC of EIA north crest has obvious annual variation characteristics, which is larger in equinox months and smaller in summer and winter months; Compared with previous studies, the latitude of the peak point of the EIA north crest is lower, and the occurrence time is a little later in summer than in other seasons; The TEC in the north crest region shows obvious diurnal and seasonal variation characteristics in time and obvious north-south gradient in space; The north-south gradient of TEC also shows obvious seasonal and diurnal variation characteristics, but there is no obvious relationship between the gradient and latitude in the study area; In case of geomagnetic storms, the TEC responses at different latitudes in the north side of EIA crest region are relatively consistent, but the percentages of decrease or increase in TEC are different with the latitude.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"44 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":"127215267","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

IconSpace 2021 Cover Page IconSpace 2021封面

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768685

引用次数: 0

Numerical Analysis of the Measured Temporal Rainfall Rate and Rain Attenuation in a Tropical Location 热带地区实测时间降雨率和降雨衰减的数值分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768750

O. O. Ometan, T. Omotosho, S. A. Akinwumi, M. O. Adewusi, T. E. Arijaje, O. A. Adeyemi

{"title":"Numerical Analysis of the Measured Temporal Rainfall Rate and Rain Attenuation in a Tropical Location","authors":"O. O. Ometan, T. Omotosho, S. A. Akinwumi, M. O. Adewusi, T. E. Arijaje, O. A. Adeyemi","doi":"10.1109/iconspace53224.2021.9768750","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768750","url":null,"abstract":"Extreme weather condition is one of the major challenges observed in the troposphere due to meteorological weather parameters such as rainfall. Rainfall causes severe attenuation to satellite communication at Ku band. This paper studied the numerical relationship between the calculated rain attenuation and the observed rain rate at Ku band for the tropical station based on a 12-month data measurement. This paper aims at presenting the proportional variation between rain rate and rain attenuation in the locality of interest. A tipping bucket rain gauge is used to obtain and analyse rain rate data. One-minute signal strength measurement were obtained and analysed. The 12-month data were obtained from January till December 2015. The result shows an average rain rate of about 237.0 mm/hr, 114.0 mm/hr, 38.0 mm/hr and 3.0 mm/hr and attenuation of 4.74, 4.25, and 3.59 and 2.66 dB/km at 12.245 GHz, respectively, for 0.001 %, 0.01% and 0.1% and 1 % of the time respectively for the combined values of rain rate and rain attenuation statistics. The result indicates a corresponding direct proportionality between the rain rate and rain attenuation.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"28 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":"133363510","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

Real Time Hardware Implementation of Cyclostationary Spectrum Sensing for Various Modulation Types Using USRP 基于USRP的各种调制类型的周期平稳频谱感知的实时硬件实现

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768689

H. Abed, H. Abdullah, Mahmood A. Mahmood

{"title":"Real Time Hardware Implementation of Cyclostationary Spectrum Sensing for Various Modulation Types Using USRP","authors":"H. Abed, H. Abdullah, Mahmood A. Mahmood","doi":"10.1109/iconspace53224.2021.9768689","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768689","url":null,"abstract":"Cognitive radio (CR) is an emerging technology to solve the spectrum scarcity problem. Spectrum sensing is the most important step in CR. Spectrum sensing techniques can be classified into three main types: energy detection, matched filter, and cyclostationary. Cyclostationary sensing technique is more accurate than others since it can differentiate between signal and noise by using autocorrelation process without needing the previous knowledge about primary user (PU) signal. In this paper, we design and implement the cyclostationary feature detector in a real environment using the GNU-Radio framework and the universal software radio peripheral (USRP) N210 less complexity in the design as compared to the designs in the literature. The proposed design is tested under various types of PU signals. These types are classified into three scenarios: the first scenario is a single carrier (QPSK, 64QAM, and 256QAM), the second scenario is a multi-carrier (OFDM with 64 subcarriers, 64QAM data channel), while the third scenario is assumed that the PU is absent (only Gaussian noise). The PU signal is implemented using AWG (Arbitrary Waveform Generator) 7122c from Tektronix. The distance between PU (AWG) and secondary user (SU) (USRP N210) is 10 m, which is longer than those used in the literature. The experiment results show that the proposed system is applicable for various types of signals (single carrier, multicarrier (OFDM), and Gaussian noise only) with satisfactory performance. In the case of the presence of PU (single carrier and OFDM), the peaks of cyclostationary feature detection occur in the center and cyclic frequencies. When PU is absent (Gaussian noise only), the results show that there are no peaks at the cyclic frequencies and there is a small peak at the center frequency, which confirms the right operation of the implemented system.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"24 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":"122824191","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

Design and Analysis of a Patch Antenna for Nanosatellite Transmission System 纳米卫星传输系统贴片天线的设计与分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768745

T. Alam, N. Sahar, Abdullah Al Imtiaz, Md. Amanath Ullah, M. Tariqul Islam

引用次数: 1

The Atmospheric Profiling Analysis over Stratosphere-Troposphere Layer above Ocean during Pandemic from GPS-RO Measurement 基于GPS-RO测量的大流行期间海洋上空平流层-对流层大气剖面分析

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768682

Rohaniza M. Zali, Mandeep J.S

{"title":"The Atmospheric Profiling Analysis over Stratosphere-Troposphere Layer above Ocean during Pandemic from GPS-RO Measurement","authors":"Rohaniza M. Zali, Mandeep J.S","doi":"10.1109/iconspace53224.2021.9768682","DOIUrl":"https://doi.org/10.1109/iconspace53224.2021.9768682","url":null,"abstract":"The convection processes between stratosphere-troposphere layer is a key element as an indicator for climate changes. The human activities that cause the emission of greenhouse gasses were lead to the year 2020 as the second warmest year before 2016. Furthermore, the understanding of the correlation between the changes of atmospheric profiling and climate event can help the researchers to find a better solution to avoid any upcoming disaster. Therefore, this study has been proposed to investigate the atmospheric profiling changes element by using the GPS radio occultation (RO) data signal from MetopA mission to understand the atmospheric profiling structure over the Upper Troposphere and Lower Stratosphere (UTLS) layer. The analysis has been divided into three latitudinal zones which ±0° to ±25°, ±25° to ±65°, and ±65° to ±90° as a Tropical, Sub-tropical and Polar zones respectively. The analysis shows that the abnormality of temperature distribution trend in vertical resolution for the month of September to December 2020 causes the changes of UTLS location due to the warmest surface of the ocean with lower pressure that could lead the tropical cyclone production.","PeriodicalId":378366,"journal":{"name":"2021 7th International Conference on Space Science and Communication (IconSpace)","volume":"919 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":"123492897","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

Comparison of Rain Attenuation Model for Equatorial Climate 赤道气候降雨衰减模式的比较

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768726

M. Singh, Wan Rosnah Wan Saleh

引用次数: 0

Preliminary Assessment of Seasonal Variations of Geomagnetic H Component at Langkawi in Malaysia During Solar Minimum of Cycle 24 第24周期太阳极小期马来西亚兰卡威地磁H分量季节变化的初步评估

2021 7th International Conference on Space Science and Communication (IconSpace) Pub Date : 2021-11-23 DOI: 10.1109/iconspace53224.2021.9768693

M. Hashim, M. H. Jusoh, N. Hamid, K. Burhanudin, Z. M. Radzi, A. Yoshikawa, Z. I. Abd Latiff

引用次数: 0