How to use fuction "coverage" to caculate a GEO satellite's coverage map?

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Zora Aria Jade
Zora Aria Jade 2023-12-27
评论： Ashok 2024-10-29，5:52
The max range of the coverage must be less than or equal to maximum propagation distance, which is Earth's radius, 6371 km. However, how to use fuction "coverage" to caculate a GEO satellite's coverage map on earth? Like example lridium Satelite SootBeam Coverage on the US.
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Zora Aria Jade
Zora Aria Jade 2023-12-29
Misuse rfprop.PropagationModel/distancePathloss
Distance between sites must be less than or equal to maximum propagation distance, which is Earth's radius, 6371 km."

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Ashok
Ashok 2024-10-18
编辑：Ashok 2024-10-18
Hey @Zora Aria Jade,
The ‘coverage’ function needs transmitter sites and a propagation model as inputs, as detailed in the documentation:
https://www.mathworks.com/help/releases/R2023b/comm/ref/txsite.coverage.html
Transmitter sites can be created using the ‘txsite’ function, and the propagation model can be selected based on the desired path loss calculations. More information is available here:
The example Iridium Satellite Spot Beam Coverage on the US demonstrates the coverage calculation for an antenna array and can be found at,
https://www.mathworks.com/help/releases/R2023b/phased/ug/iridium-satellite-spot-beam-coverage-on-map-of-us.html
The attached code contains a simplified version of the example. It plots the coverage map for a single satellite with default antenna properties. Note that the ‘Terrain’ property of the ‘siteviewer’ is set to ‘none’, in the attached code. This is necessary for analysing coverage distances greater than 500 km.
I believe this will assist you!
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Zora Aria Jade
Zora Aria Jade 2024-10-21
Thank you for your reply. However, the GEO satellite is about 35786km away from the ground, which exceeds the limit of 6371km, and its coverage map on the Earth cannot be calculated using the coverage function.
Ashok
Ashok 2024-10-29，5:52
Yes, the Earth's radius appears to be the limiting factor for maximum propagation distance in propagation modeling.

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