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We are conducting three initiatives in SERC, Kyushu University, in order to accomplish the ISWI objectives. The first is an instrument array (MAGDAS) program to deploy new and existing observation networks. The second is data coordination to develop predictive models using MAGDAS and JAXA satellite data. And the third is training, education (that is capacity building), and public outreach programs,...
Normalized Difference Water Index (NDWI) and MODIS Normalized Difference Vegetation Index (NDVI) showed a relationship with annual rainfall and soil moisture. A very significant relationship found in polynomial relationship between annual rainfall with NDVI and MODIS NDVI (r2 = 0.830 and 0.983). Higher rainfall was associated with higher NDVI value for both, surface reflectance imagery and MODIS NDVI...
The tracking error at the output of the Phase Locked Loop (PLL) in the receiver causes by the ionospheric scintillation, limits the accuracy of the range measurements which the receiver uses to compute the position. Determination of tracking error variance is accomplished using Conker's model which requires the spectral parameters (spectral slope, p and spectral strength at frequency 1 Hz, T). Three...
This paper presents a design for an embedded on board computer that can be used in LEO satellites based on FPGA technology. The design makes use of the multi-core concept provided by modern FPGA's through soft IP cores. The used FPGA is Xilinx V5 FX70, it includes 1 PowerPC 440 processor implemented as hardcore. The rest of processors are Microblaze processors V7.30, implemented as soft IP cores....
This paper presents a numerical analysis on the effectiveness of SAR reduction by attaching conductive shielding material to mobile phone. The characteristics of aluminium sheet that acts as a conductive shielding material on the SAR reduction such as position, thickness, and size are investigated in this research. It also studies the effects of conductive shielding material on the antenna performance...
Flood is a disaster where an area is unable to hold more water. It caused by soil's low absorption and hard rain. Flood can be predicted if information of short term rain intensity could known immediately. The result of development research about rain gauge that easily and promptly read using Bluetooth and modem RF-FSK will be discussed in this paper. Rain gauge's products which are manual, semi-automatic...
This paper presents an investigation of bandwidth enhancement of a concentric split ring square reflectarray element in terms of phase and return loss versus frequency graph performance. The performance of element's phase response is then to be compared to the concentric solid ring square element whereby studies on the phase range and slope are carried out to the variation size of elements within...
Rapid development of countries can cause many environmental problems. One of the problem is water pollution which is the result of urban runoff from industrial and resident area. It has become a major global problem as it can lead to many deaths and diseases among human being. One of the main sources of water pollution is the suspended or colloidal particles which commonly referred as total suspended...
A compact planar monopole antenna with dual band-notch characteristics is proposed for ultrawideband (UWB) communication applications. The proposed compact antenna consists of an annular ring patch and a partial ground plane with a rectangular slot. Two partial and semicircular annular slots are etched at the upper and lower side of the ring radiator for achieving dual notched frequency band. The...
Remote sensing is a very useful method in application of establishing land cover map. It has been widely used for detecting and analyzing land cover/use feature in our environment especially in the developing country like Malaysia. The objective of this study is to investigate the use of quad polarization ALOS-PALSAR data for land cover/use classification. Speckle filtering was an improvement over...
Medium resolution earth observation satellites system such as Landsat, due to its extensive historic archives, provides wealth of information useful for urban monitoring purposes. One of the main problems in usage of medium resolution satellite images in urban monitoring is high occurrence of mix-pixel within urban area. Mix-pixels which compose of multiple land classes hamper the urban study at a...
Remote sensing technology and the advance of science are very useful information in land cover classification study. In this study, data from an airborne radar system, AIRSAR (Airborne Synthetic Aperture Radar) containing C, P and L bands each with HH, VV and HV polarizations were used to identify land cover features in two study areas in Kedah. The main objective of this study was to investigate...
This paper discusses the prediction of very low frequency (VLF) propagation signal that is perturbed by lightning using artificial neural networks (ANN). In this study, the VLF signal is from the transmitter station at Ebino, Japan. Direct interference from lightning discharge is one of the disturbances where the broad spectrum of electromagnetic radiation generated will be trapped in the wave guide...
Rain attenuation has become the major factor in the performance of satellite communication links due to the high rainfall rate in tropical climates. It has become the main constraint when designing the satellite communication services especially above 10 GHz. Several research evidences show that ITU-R rain attenuation model is not exactly performing well in tropical climates. Therefore, the main concern...
The ionospheric horizontal gradient is the variation of electron density with latitude and longitude which can cause the azimuthal deviation of the Global Positioning System (GPS) ray path. In this paper, the improvement in Differential GPS (DGPS) positioning will be shown by applying the ionospheric horizontal gradient correction to the carrier phase measurement from each GPS satellite. The ionospheric...
The total atmospheric absorption due to Oxygen and water vapour on the earth-space path at Ku (12/14 GHz), Ka (20/30 GHz), and V (40/50 GHz) bands was evaluated for communication with Nigeria communication satellite (Nigcomsat1) on both uplink and down link at 0.01 % unavailability of an average year. The basic input climatic data used include monthly and yearly mean meteorological parameters of surface...
Geographical Information System (GIS) can be used as a powerful tool in mapping large areas with varying Radio Frequency Interference (RFI) profiles. In this paper, we report the initial testing of the usage of this system in order to identify the areas with the lowest RFI. Among the important parameters used to develop the database for our GIS are information on population density, location and power...
Solar activities play significant roles in electromagnetic coupling of the Sun — Earth system. By comparing the 11-year sunspot cycles and global earthquake events during 1963 to 2010 period, it is possible to reveal the correlation of solar and seismic activities. In the present paper, the monthly values of sunspot cycles number 20 to 23 and earthquake events at different magnitude scales were analyzed...
Carbon monoxide (CO) is an important pervasive atmosphere trace gas affecting to the climate. Worldwide, the anthropogenic sources produce about 50% of CO emissions with the remainder coming from biomass burning and oxidation. The CO plays as a significant indirect greenhouse gases due to its influences on the budgets of hydroxyl radicals (OH) and Ozone (O3). Results from the analysis of the retrieved...
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