Thread: DRM in USA
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Old May 25th 04, 08:33 AM
starman
 
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Brenda Ann Dyer wrote:

"Telamon" wrote in message
...
Rain is not the only problem for satellites. How about when they line up
with the Sun? Doesn't that also cause problems?


Indeed it does... and this is one of the times of the year that this happens
in the northern hemisphere. It also affects uplinks, though not so badly.
Having a larger dish doesn't necessarily help in this case, since it tends
to amplify the noise along with the signal.


Since geosyncronous satellites are located in relatively stationary
orbits above the equator, solar interference can only happen when the
position of the sun is also near the (celestial) equator. This happens
near the equinoxes in March and September. The sun is currently nearing
the June solstice point (+23/deg above the equator) which puts it well
above the apparent positions of geosyncronous satellites.


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