Sun outage calculator for geostationary orbit satellites
Sun outages in satellite communication occur when the sun, a powerful broadband microwave noise source, passes directly behind the satellite (when viewed from Earth), causing the receiver with the beam directed towards the satellite to pick up the satellite signal and the noise from the sun. A new...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Fakulti Kejuruteraan ,UKM,Bangi.
2014
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| Online Access: | http://journalarticle.ukm.my/8521/1/344-502-1-PB.pdf http://journalarticle.ukm.my/8521/ http://www.ukm.my/jkukm/index.php/jkukm/issue/view/36 |
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| Summary: | Sun outages in satellite communication occur when the sun, a powerful broadband microwave noise source, passes directly
behind the satellite (when viewed from Earth), causing the receiver with the beam directed towards the satellite to pick
up the satellite signal and the noise from the sun. A new type of calculator was developed to accurately determine the
occurrence of such phenomena for any chosen geostationary satellite and receiver location combination. The calculator
outputs the degradation experienced by the satellite signal, enabling the receiver to take suitable countermeasures. The
results from the calculator program were compared with measurement results and agreed to a good degree. Several different
open-source calculation tools exist for sun outages. However, these tools are either built from incorrect assumptions or
lack of a useful function, leading to inaccurate predictions for strength and beginning/ending time of the outages. The
program described in this work has more inputs, such as the solar fl ux, with which the sun’s activity can be considered
when calculating outage duration and receiver noise temperature. Regression analysis was used to develop a linear model
to estimate daily solar fl ux at a frequency of interest from the day’s solar fl ux 2800 MHz observations (F10.7). |
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