2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes
| Format: | General Document |
|---|
| _version_ | 1860797985091223552 |
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| building | INTELEK Repository |
| collection | Online Access |
| collectionurl | https://intelek.unisza.edu.my/intelek/pages/search.php?search=!collection3 |
| copyright | Copyright©PWB2025 |
| country | Malaysia |
| date | 2018-07-03 15:36 |
| format | General Document |
| id | 15277 |
| institution | UniSZA |
| originalfilename | STUDY OF BATIK EFFLUENT TREATMENT USING MORINGA OLEIFERA AS COAGULANT-FLOCCULANT (MASTER_2017).pdf |
| person | PDFsam Basic v4.2.10 Marhamah binti Mohd Safien @ Mohd Shafie |
| recordtype | oai_dc |
| resourceurl | https://intelek.unisza.edu.my/intelek/pages/view.php?ref=15277 |
| sourcemedia | Server storage Scanned document |
| spelling | 15277 https://intelek.unisza.edu.my/intelek/pages/view.php?ref=15277 https://intelek.unisza.edu.my/intelek/pages/search.php?search=!collection3 General Document Malaysia Library Staff (Top Management) Library Staff (Management) Library Staff (Support) Terengganu English UniSZA East Coast Environmental Research Institute application/pdf 1.5 PDFsam Basic v4.2.10 Chemometrics Server storage Scanned document Universiti Sultan Zainal Abidin UniSZA Private Access Universiti Sultan Zainal Abidin SAMBox 2.3.4; modified using iTextSharp™ 5.5.10 ©2000-2016 iText Group NV (AGPL-version) 2018-07-03 15:36 122 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes STUDY OF BATIK EFFLUENT TREATMENT USING MORINGA OLEIFERA AS COAGULANT-FLOCCULANT (MASTER_2017).pdf Copyright©PWB2025 Marhamah binti Mohd Safien @ Mohd Shafie Inside of electromagnetic spectrum, astronomical objects were radiated in the range of radio frequency. The long wavelength of radio frequency travels through the interstellar space until it reaches the earth through different mediums of propagation before being measured by a radio telescope on the ground. Ultra-high frequency (UHF) band, normally is crowded with telecommunication services where some rest frequency for astronomical lines such as HI and OH radicals lies in it. The coexistence of this band could interrupt radio astronomical observation. Another problem is that the radio signals from the telecommunication services are susceptible to interference by tropical weather factors. This interference could increase or decrease the average signal and obstruct the astronomical observation. This study is set out to obtain the relationship between solar radiation and radio signal in UHF band for radio astronomy purposes. Discone antenna connected to low noise amplifier (LNA) and connected to spectrum analyser was used to measure the ambient radio environment in Balai Cerap KUSZA (BCK) for 24-hour observation. Then, the data measurements for six days in different months were conducted at the same site. Simultaneously, the weather station was used to measure solar radiation in W/m2 for one-minute interval. The data were analysed statistically using Spearman’s correlation. The result obtained shows the radio environment within UHF band in BCK was occupied by telecommunication services (382.5 MHz, 945 MHz, 1800.0 MHz and 2160.0 MHz). However, there were still RFI free zone exist in UHF band which are (i) between 427.5 MHz and 877.5 MHz (ii) between 990.0 MHz and 1080.0 MHz (iii) between 1215.0 MHz and 1710.0 MHz (iv) between 1912.5 MHz and 1980.0 MHz (v) between 2205.0 MHz and 2295.0 MHz and (vi) between 2385.0 MHz and 3000.0 MHz. Statistically, the effect of solar radiation is significant in all peaks. It is largely correlated with a correlation of 0.6252 (Peak I), 0.6769 (Peak III), 0.5965 (Peak IV) during January and -0.5920 (Peak II) and -0.4788 (Peak III) only during September and others shows moderate and small correlation during the other days. These findings suggest that there is no direct correlation between solar radiation and radio signal. However, the radio signals correspond well with solar radiation with supporting combination of several meteoparameters. This information can be helpful to radio astronomer who searches for a site with low interference and helps communication engineers to establish a way to reduce interference caused by solar radiation on radio signal in UHF band. Pollution—Measurement Multivariate analysis Environmental chemistry—Statistical methods Water quality—Mathematical models Water quality—Measurement Environmental monitoring—Statistical methods Hydrology—Statistical methods Water—Pollution—Analysis Geochemical modeling Dissertations, Academic Solar Radiation Radio Astronomy Radio Frequency Interference; Solar Radiation; UHF Band; Correlation Analysis; Radio Frequency Attenuation Thesis |
| spellingShingle | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| state | Terengganu |
| subject | Chemometrics Pollution—Measurement Multivariate analysis Environmental chemistry—Statistical methods Water quality—Mathematical models Water quality—Measurement Environmental monitoring—Statistical methods Hydrology—Statistical methods Water—Pollution—Analysis Geochemical modeling Dissertations, Academic |
| summary | Inside of electromagnetic spectrum, astronomical objects were radiated in the range of radio frequency. The long wavelength of radio frequency travels through the interstellar space until it reaches the earth through different mediums of propagation before being measured by a radio telescope on the ground. Ultra-high frequency (UHF) band, normally is crowded with telecommunication services where some rest frequency for astronomical lines such as HI and OH radicals lies in it. The coexistence of this band could interrupt radio astronomical observation. Another problem is that the radio signals from the telecommunication services are susceptible to interference by tropical weather factors. This interference could increase or decrease the average signal and obstruct the astronomical observation. This study is set out to obtain the relationship between solar radiation and radio signal in UHF band for radio astronomy purposes. Discone antenna connected to low noise amplifier (LNA) and connected to spectrum analyser was used to measure the ambient radio environment in Balai Cerap KUSZA (BCK) for 24-hour observation. Then, the data measurements for six days in different months were conducted at the same site. Simultaneously, the weather station was used to measure solar radiation in W/m2 for one-minute interval. The data were analysed statistically using Spearman’s correlation. The result obtained shows the radio environment within UHF band in BCK was occupied by telecommunication services (382.5 MHz, 945 MHz, 1800.0 MHz and 2160.0 MHz). However, there were still RFI free zone exist in UHF band which are (i) between 427.5 MHz and 877.5 MHz (ii) between 990.0 MHz and 1080.0 MHz (iii) between 1215.0 MHz and 1710.0 MHz (iv) between 1912.5 MHz and 1980.0 MHz (v) between 2205.0 MHz and 2295.0 MHz and (vi) between 2385.0 MHz and 3000.0 MHz. Statistically, the effect of solar radiation is significant in all peaks. It is largely correlated with a correlation of 0.6252 (Peak I), 0.6769 (Peak III), 0.5965 (Peak IV) during January and -0.5920 (Peak II) and -0.4788 (Peak III) only during September and others shows moderate and small correlation during the other days. These findings suggest that there is no direct correlation between solar radiation and radio signal. However, the radio signals correspond well with solar radiation with supporting combination of several meteoparameters. This information can be helpful to radio astronomer who searches for a site with low interference and helps communication engineers to establish a way to reduce interference caused by solar radiation on radio signal in UHF band. |
| title | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| title_full | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| title_fullStr | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| title_full_unstemmed | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| title_short | 2018_Solar Radiation Effect on Radio Frequency Interference (RFI) in UHF Band for Radio Astronomy Purposes |
| title_sort | 2018_solar radiation effect on radio frequency interference (rfi) in uhf band for radio astronomy purposes |