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All Journal Asean Journal of Science and Engineering (AJSE) ASEAN Journal of Science and Engineering Education (AJSEE)
Prasert Kenpankho
King Mongkut’s Institute of Technology Ladkrabang
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Engineering Materials Science & Nanotechnology Other

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 1 
Analysis of the Relationship Between Earthquake Events and the Disturbance of Ionosphere by Using IGS TEC Nawaphon Phansori; Piyanon Boatong; Sirinil Phukrongta; Onuma Kriamthaisong; Prasert Kenpankho
ASEAN Journal of Science and Engineering Education Vol 1, No 1 (2021): AJSEE: March 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (565.889 KB) | DOI: 10.17509/ajsee.v1i1.32446

Abstract

This research aims to study and analyse the relationship between earthquake events and the disturbance of the ionosphere. The method for this research is to use the International GNSS Service (IGS) network to get Total Electron Content (TEC) in the ionosphere and then find the correlation between earthquake events and ionosphere characteristics. The result is correlated at 0.089, which shows the evidence of correlation on earthquake magnitudes and ionosphere. For future work, the researchers will study an impact on the development of an earthquake warning system.
Galileo-E5a Bandwidth Frequency Filter Design for Galileo-E5a Receiver Teerachet Mekpradab; Narumol Onanong; Surachet Chinnapark; Julongkorn Pattameak; Prasert Kenpankho
ASEAN Journal of Science and Engineering Vol 2, No 2 (2022): AJSE: September 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1988.9 KB) | DOI: 10.17509/ajse.v2i2.37798

Abstract

This study focused on the design of the band-reject filter on the frequency of the Galileo satellite by providing bandwidth at the cut-off frequency equal to the bandwidth of the Galileo-E5a. The selecting of response characteristic is Butterworth's maximally flat, amplitude-frequency response of the band-reject filter. This poster shows the combination of the LPF and HPF to perform a band-reject filter. Therefore, there are two combinations also in designing for the band-reject filter. This combination aims to influence the performance of the band-reject filter. Band rejects filter design using the frequency of the Galileo-E5a with bandwidth is 25 MHz.using a Butterworth filter which is presented in this poster. The circuit is composed 3rd.order.Moreover, the combination between LPF and HPF is designed to act as a band-reject filter. As a  result, we can filter the frequency of Galileo-E5a by using the band-reject filter.
QZSS L1 Bandwidth Frequency Filter Design for QZSS Receiver Narumol Onanong; Julongkorn Pattameak; Teerachet Mekpradab; Surachet chinnapark; Prasert Kenpankho
ASEAN Journal of Science and Engineering Vol 1, No 1 (2021): AJSE: March 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (796.871 KB) | DOI: 10.17509/ajse.v1i1.33764

Abstract

We present the design of bandpass filter on the frequency of the QZSS satellite, by providing bandwidth at the cut-off frequency equally to the bandwidth of the QZSS L1 with selecting the response characteristic on Butterworth maximally flat amplitude. Bandpass filter design using frequency of the QZSS L1 with bandwidth is 24MHz. The design procedure involves two steps, the first step is to find the required order of the filter, which we use 3rd order, and the second step is to find the scale factor that must be applied to the normalized parameter values. The Band-Pass Butterworth filler is a combination between low pass and high pass. For the Butterworth filter, the value of a resistor that has been used are 50Ω. Then go to find the capacitor and inductor and by using PSpice as the tools for the simulation. The results of the output of bandpass filter at -3dB was between 1563 and 1587MHz. And was bandwidth around 24MHz. The combination of the lowpass filter and high pass filter is to perform as the bandpass filter. Therefore, there are two combinations also in designing bandpass filter. The aim of this combination is to have an influence on the performance of bandpass filter. As a conclusion, this designed filter on the frequency of QZSS L1 is to be useful by using bandpass filter.
QZSS L5 Bandwidth Frequency Filter Design for QZSS Receiver Julongkorn Pattameak; Narumon Onanong; Teerachet Makpradab; Surachet Chinnapark; Prasert Kenpankho
ASEAN Journal of Science and Engineering Vol 2, No 1 (2022): AJSE: March 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1635.847 KB) | DOI: 10.17509/ajse.v2i1.37778

Abstract

The purpose of this study was to design QZSS L5 Bandwidth Frequency Filter for QZSS Receiver. We presented the configuration of the Butterworth bandpass filter by using PSpice as the tool for the simulation. Bandpass filter frequency of the QZSS L5 with bandwidth is designed in 25 MHz using the Butterworth filter which is presented in this article. These designed circuits are composed of the 3rd order. Moreover, the combination between low pass filter and high pass filter is performed as a bandpass filter. In conclusion, this designed filter on the frequency of QZSS L5 is to be useful by using the Butterworth bandpass filter.
Co-Authors Julongkorn Pattameak Narumol Onanong Narumon Onanong Nawaphon Phansori Onuma Kriamthaisong Piyanon Boatong Sirinil Phukrongta Surachet Chinnapark Teerachet Makpradab Teerachet Mekpradab