Sejarah pengaruh pelita terhadap kehidupan masyarakat pedesaan daerah Sumatera Barat

Sampai saat ini telah dilaksanakan Pelita ketiga, dengan segala hasil yang telab dapat dirasakan manfaatnya. Telah banyak terjadi perubahan terbadap kebidupan masyarakat di daerab perkotaan, begitu juga di daerab pedesaan. Pengarub ini tidak banya dirasakan di daerah Indonesia lainnya, tetapi juga di Sumatera Barat. Tidak sedikit kebutuban bidup masyarakat Indonesia tergantung pada desa. Tetapi di lain pihak, mengingat laju transportasi yang membaik, maka desa pun tidak dapat pula menghindarkan diri dari pengaruh kota. Sadar akan pentingnya kedudukan dalam rangka pembangunan negara, maka pemerintah selalu meningkatkan perhatiannya ke desa. Bantuan pembangunan desa pada setiap Pelita semakin meningkat

Characteristic of mobile satellite l-band signal in mid-latitude region:GPS approach

Mobile satellite L-band signal that propagates from the transmitting satellite to the receiver experiences impairment mainly due to shadowing and multipath effects. In the present study, open space data has been obtained for Fukuoka, Japan (mid-latitude) using portable global positioning system (GPS) satellite receiver. The received signal performance, fading characteristic and cumulative distribution function of certain GPS satellites over the sky of Fukuoka have been observed and analysed. A general mathematical model representing the signal strength for the open space environment has been deduced based on the collected data. The outcome of this study can be used in future research to determine the effect of different mobile satellite environment on the arriving mobile satellite signal in improving the quality of service perceived by mobile satellite users

Open Space Mathematical Model for the Mobile Satellite L-Band Signal in Sarawak using Global Positioning System Technology

The effect of ionosphere on mobile satellite (MS) L-band signal which are propagated from the transmitting satellite to the receiver over the equatorial region has attracted much interest. Sarawak which is located near the equatorial region has been selected for the purpose of this research. By means of data acquisition system using the Global Positioning System (GPS) technology, data measurement and analysis has been carried out at the Universiti Malaysia Sarawak campus in early months of 2010. The results have been presented in the forms of received signal performance, fading characteristics and complementary cumulative distribution function of certain GPS satellites over the sky of Sarawak. A general mathematical model representing the signal strength for the open space environment in equatorial region has been developed. The availability of more satellite propagation data in different places of equatorial region will improve the MS model and quality of service perceived by MS users

A Simple and Cost Effective Data Acquisition System for Mobile Satellite Experimental Work under Treeshadowed and Building-shadowed

Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect, multipath fading, treeshadowed and building-shadowed. This affects the Mobile Satellite Service (MSS) to provide continuous communication service to the users. Since there is not adequate data available on the signal performance of the MS in the Asian continent, thus, an experimental work is essential to be carried out to investigate the effect of factors such as the tree-shadowed and buildingshadowed on the signal strength. This paper discusses the cost effective set up. It can be used to measure the effect of trees and buildings on the received mobile satellite signal operating in the L-band. The methodology uses to carry up the experimental works is discussed in detail. The measurements of the signal performance are performed under different MS environments such as tree-shadowed and building-shadowed and hence the results are compared to the data obtained for open space environment. The analysis of the signal performance under different MS environments is performed with respect to the elevation and azimuth degree at different time under a clear sky condition. The analysis produced forms an important part in the studies of the signal performance. From this research work, we would like to propose a simple and low cost data acquisition system in order to encourage more experimental works to be carried out especially in the less developed countries

Characteristics of mobile satellite L-band signal in mid-latitude region: GPS approach

105-112Mobile satellite L-band signal that propagates from the transmitting satellite to the receiver experiences impairment mainly due to shadowing and multipath effects. In the present study, open space data has been obtained for Fukuoka, Japan (mid-latitude) using portable global positioning system (GPS) satellite receiver. The received signal performance, fading characteristic and cumulative distribution function of certain GPS satellites over the sky of Fukuoka have been observed and analysed. A general mathematical model representing the signal strength for the open space environment has been deduced based on the collected data. The outcome of this study can be used in future research to determine the effect of different mobile satellite environment on the arriving mobile satellite signal in improving the quality of service perceived by mobile satellite users