Pengembangan Metode Anfis Untuk Prediksi Liputan Awan (Tbb) Berbasis Satelit MTSAT

This paper mainly discusses the development of the method of ANFIS (Adaptive Neuro Fuzzy Infreence System) for the prediction of top cloud temperature (defined as the Tbb, Temperature black body) based on the MTSAT (Multi-Functional Satellite Transmission) satellite data which is expected to be applied to monitor the flooding which could be due to the extreme rainfall. Based on the Tbb data analysis over Bandung for one year of observation (January to December 2010) with observation of hourly resolution, then obtained a temporal time-series data as much as 16278 hours of observation. From these data, 16269 data is used for the learning process (training), while the remaining of 9 hours is used for prediction of 3 and 24 hours, respectively. Validation is done by comparing the original training data with the data consisting of four stages, namely the prediction of the next month (January), predicted the next three months (January, February and March), prediction of the next six months (January, February, March , April, May and June) as well as predictions for the months July, August, September, October, November and December with hourly resolution. The results show that the Tbb of the top cloud temperature patterns and data on one-month training has a sinusoidal pattern with a correlation coefficient (r2) of 0.68, three hours into the future predictions with r2 of 0.92 and so on. While for the stage months others will be described in this paper. Another interesting case studied in this paper is more suitable ANFIS method was used for continuous data that is clearly seen from the obtained training dataHal. 228-23

Rancang Bangun Sistem Manajemen Basis Data Satelit Dan Implementasinya

Hal. 186-19

Pengamatan Awan Dan Variasi Cuaca Harian Menggunakan Transportable X-Band Radar

Weather observation campaign using Transportable X-band radar has been done during March 13 to 19, 2013 around Bandung, West Java. The observation for detecting cloud expansion has been done through two fundamental methods of radar scanning, there were Plan Position Indicator (PPI) and Range Height Indicator (RHI). The results showed cloudexpansion over Bandung area especially during March 14 to 18, 2013. The result from PPI scan at 3 km, so called Constant Altitude Plan Polar Position (CAPPI) observation depicted that convective activity reach its maximum at 09 UTC. RHI observation scan showed cloud expansion that growth reach over 10 km. The diurnal variation that described fromobservation data indicated that cloud expansions over Bandung area were generally influenced by the orographic topography around the locationHal. 217-22

Analysis of Transmitter Half Angle and FOV Variations on Multiplexing Indoor Li-Fi Communication

Light fidelity (Li-Fi) is the communication technology that is in great demand for future technology because it provides communication services with the high bandwidth, especially for indoor communication. However, Li-Fi requires the proper device placement to meet line of sight (LOS) conditions as the primary requirement for visible light communication (VLC). Therefore, this study aims to design the multiplexing indoor Li-Fi communication model for 4 channels by varying the transmitter half angle and field of view (FOV) values using movable light emitting diode (LED) panel. The investigation is carried out for variations in the angle value of 30o up to 75o and 25 nm channel spacing using bit rate of 20 Mbps per channel. System performance observations include of the optical received power, signal to noise ratio (SNR), Q-factor and bit error rate (BER) values. Based on the test results show that the performance of each channel with 25 nm channel spacing has met the ITU-T standard, where the fourth channel has the best performance. However, the use of trasmitter half angle and FOV values have the significant effect on the received signal quality. This is indicated by the variation of the 30o half angle transmitter and FOV values which have the best received signal quality compared to other variations (45o, 60o, and 75o). So this study recommends the use of a small transmitter half angle and FOV values for the application of multiplexing indoor Li-Fi