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There is need for experimental data in the less developed and developing countries such as Africa, Asia and Latin America for the study and analysis of mobile satellite signal performance for communication purposes. The experiments were carried out in open space area with no obstruction of the direct wave. Comparisons were made between the soft reformatted data obtained in Kano, Kota Samarahan in Sarawak and Fukuoka in Japan. Data acquisition system developments were designed to manage the open space environment satellite propagation data for the less develop regions, whereby adaptive graphical user interface (AGUI) was designed and developed to records the propagations data. Therefore the recorded data will be used to evaluate the signal performance in term of SNR, azimuth angles and satellite elevation angles. Results obtained from analysis will be used to determine the characteristics of the open space environment. This method can be used to encourage more experimental works in t...
2014 •
Mobile Satellite (MS) Signal performance is affected by many factors such as ionospheric effect, multipath fading tree-shadowed and buildingshadowed. These cause variations in the received signal quality. Although many studies have been carried out in order to improve the performance of MS signal, there are still many areas lacking data especially from the less-developed and developing countries. Furthermore, costly data acquisition method hinders more study to be carried out in these regions. This paper discusses the cost effective alternative method for MS data acquisition for satellite operating in the L-band by utilizing the GPS satellites data. Details methodology for doing the experimental works will be discussed. The measurements of the signal performance are performed for open space environment in Sarawak. The analysis of the signal performance under different MS environments is performed with respect to the information such as elevation and azimuth angles. The analysis prod...
Proceeding of the 2011 IEEE International Conference on Space Science and Communication (IconSpace)
Open space mathematical model for the mobile satellite L-band signal in Sarawak using Global Positioning System technology2011 •
Journal of Advanced Industrial Technology and Application
The Benefit and Importance of Mobile Satellite Signal in Northern Nigeria: GPS Approach2021 •
Lack of equipment to study mobile satellites signal propagation in colleges and universities prone this research work. A Handheld GPS receiver used as a tool for training college students to learn mobile satellite signal propagation using Global Positioning System (GPS) approach. These refer to the experimental setup of the equipment that is the connection done between the GPS receiver with a computer. The satellite propagation data received from the GPS machine can be recorded continuously with an updates rate of 2 seconds. The experiment was carried out in an open space environment at predetermine locations using simple setup, where a cheap, readily and available portable GPS receiver were connected to the computer to acquire propagation data. The computer was equipped with a self-developed package graphical user interface (GUI) monitoring the propagation information from the GPS satellites and saving the data. The developed system can be set up anywhere at any location. The sate-...
2008 •
This paper presents the method to analyse the effect of building on the L-band Mobile Satellite (MS) system using low-power Global Positioning System (GPS) receiver. The method includes measurement, experimental and data analysis. The analysis of the signal performance under building effect measurement was carried out with respect to the signal to noise ratio (SNR), elevation and azimuth angle. In measurement method, the National Marine Electronics Association (NMEA) sentences obtained from the satellite via GPS receiver was used to get the signal propagation parameters. The NMEA Extractor used to extract the NMEA data using C++ programming language and Ngraph software to construct the graphical presentation for analysis method. The analysis shows relationship between SNR and elevation and azimuth angle. The comparison between open space and building effect was carried out and the results have shown that the presence of the building affect the quality of the satellite signal received.
International Journal of Engineering Research in Africa
Data Acquisition System Hardware for GPS Propagation Sentences in Less Developed Countries: A Review2015 •
GPS receivers play an important role for calculating and determining the precise point positioning and deal with the navigational messages. Also, one of the main uses of high-end GPS receivers is for scientific research and space science analysis. The handheld GPS receivers were utilized for experimental purposes contrary to the traditional application for recreation and geo-catching activities. The classification of different commercial GPS receivers gave an inside idea for application and utilization of these receivers in the field of laboratory research. Garmin GPS handheld receivers performed an excellent example in conducting experimental work for GPS propagation data analysis.
2018 •
This study compares the performance of two continuously operating Global Navigation Satellite System (GNSS) receivers at the Toro observatory in Nigeria. The observatory is a proposed site for part of the global geodetic core network for collocation of GNSS and other space geodetic techniques. The pair of GNSS receivers (Ashtech UZ-12 and Trimble NetR8) are connected via a GNSS splitter to a single antenna (Trimble GNSS Choke Ring TRM59800.00). Observation files, precise orbit and clock files, and satellite differential code bias files with respect to the two receivers were collected for a period of 30 days. The WaSoft software (WaPPP module) was employed to estimate the receivers’ position, zenith tropospheric delay (ZTD) and tropospheric gradients. Also, the Gopi software was used to estimate the receivers’ bias and total electron content (TEC). The resulting parameters from the estimation software were subjected to hypothetical testing using the Student t-test based on the Bland ...
Revue italienne d’études françaises
Hypocrite typographe : quelques notes sur la traduction du Pré par Ungaretti2011 •
2014 •
World Journal of AIDS
Perceived Social Support among HIV Positive and HIV Negative People in Ibadan, Nigeria2014 •
Pamukkale University Journal of Social Sciences Institute
Arundhati Roy’un Küçük Şeylerin Tanrısı Romanı: Sömürgecilik Sonrası Ortamda Dil ve Üslup2018 •
Applied Geography
Relationship between landscape heterogeneity and plant species richness on the Mexican Pacific coast2013 •
Christian Perspectives on Science and Technology
Andrew Sloane's review of Transhumanism and the Image of GodJournal of Vietnamese Environment
Isolation and selection of nitrifying bacteria with high biofilm formation for treatment of ammonium polluted aquaculture water2017 •
Mutation research. Genetic toxicology and environmental mutagenesis
Evaluation of the genotoxicity of a herbicide formulation containing 3,6-dichloro-2-metoxybenzoic acid (dicamba) in circulating blood cells of the tropical fish Cnesterodon decemmaculatus2014 •
2008 •
Hygeia - Revista Brasileira de Geografia Médica e da Saúde
Aspectos Geográficos Das Consultas Recebidas Por Tentativas De Autoeliminação Na Emergência Do Hospital Vilardebo Na Cidade De Montevidéu, Entre 2014 e 20152019 •
Proceedings of the Academy of Sciences of the Estonian SSR. Chemistry
АЛКИЛИРОВАНИЕ β-ЙОДОВИНИЛЬНЫХ КЕТОНОВ АТ-КОМПЛЕКСАМИ МЕДИ1980 •
arXiv (Cornell University)
Energy Performance Analysis of Distributed Renewables: Pacific Northwest Smart Grid Demonstration2020 •
1999 •
The Journal of Pathology
Breast carcinoma with stromal multinucleated giant cells—a light microscopic, histochemical and ultrastructural study1986 •
Environmental and Molecular Mutagenesis
The social environment and the epigenome2008 •
Nuclear Instruments and Methods in Physics Research
On the possibility to investigate irradiated fuel pins non-destructively by digital neutron radiography with a neutron-sensitive microchannel plate detector with Timepix readout2019 •