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Topic # 59202 29-Mar-2010 23:15
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would a bigger dish prevent sun outage or am i wasting my time?

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  Reply # 312677 29-Mar-2010 23:17
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No.




Ross

 

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  Reply # 312693 30-Mar-2010 00:33
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Can sky fix the outages and have 2 sat up there running at the same time




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  Reply # 312748 30-Mar-2010 09:59
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Go Hawks!
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  Reply # 313152 30-Mar-2010 21:38
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freitasm: Two satellites wouldn't solve this. It's a technology problem.


Similar to the air gap problem if you are still connecting things via cables ... 



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  Reply # 313215 30-Mar-2010 22:28
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So much for the sun outage, at 1.30pm (as stated in the skywatch magazine) there should have been a sun outage? Well not for me, not at 1.30pm, the sun wasnt even far enough around for it to happen, if it was going to happen it would be at 2.30pm, thats when the sun was lined up with my dish. I dont think sky have taken into account daylight saving when they published skywatch? Yes that time of 1.30pm would have been correct a few years ago but daylight saving times have since been shifted by a few weeks. Even at 2.30pm I never got sun outage, picture didnt pixilate not one bit, the signal level only dropped by about 3% during that 10min period and im using just a normal skydish.

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  Reply # 313241 30-Mar-2010 23:06
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The solar outages start out with little affect and over several days the affect on the signal grows until it reaches a peak, then subsides slowly over a few days. Basing your assumption on one solar outage at the beginning of the period isn't accurate.




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  Reply # 314084 2-Apr-2010 01:36
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I sort of understand but not fully

If the sattelite is 160 degreees ( 0 degrees longatude ) would this only happen when the sun and the sattelite are in line - differnt times depending on where in NZ you are and only in June where the sun is at the most northern point but as NZ is below the tropics I cant understand why

Example dish points at optus D1  ( northerly direction from NZ ) so sun need to be behind that and at say 35 degress ( average for some kiwis ) would the sun have to be directly between the sattelite and the earth receiving dish ?

what sky print in the web site in my opinion should only happen if your longade is 0 degrees

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  Reply # 314099 2-Apr-2010 09:21
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The sun cannot go between the satellite and earth, some basic understanding of the location and distance of these things would show you that.

The issue is the sun appears directly behind the satellite as seen by each dish, so the exact time is different for each dish by some minutes. The mechanism of the outage is that the noise from the sun in the frequency band of of the satellite service will exceed the signal from the satellite when the sun is directly behind the satellite and in the direct bore sight of your dish. The end result is that your satellite recivers LNB on the dish is overpowered by the noise from the sun totally drowning out the signal from the satellite.

Cyril



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  Reply # 314137 2-Apr-2010 12:20
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During summer the sun sits high in the sky and its path across the sky crosses above D1's position, its the opposite during winter, the suns path is below D1, obviously this path of the sun will change and at some point the suns path will cross directly behind D1, this happens during equinox. Sun outtage wont just happen on D1/Skytv. It will happen on every geostationary satellite as the sun moves across the sky, sun outage will occur at different times depending on the satellites position, D1 is at 160d so it happens at approx 2.30pm. If your dish happened to be a concave mirror you would find that when sun outage was due to occur, it would burn a hole in your lnb as the suns rays would be focused instead of the sat signal.

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  Reply # 314375 3-Apr-2010 12:57
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So if sky using 2 sat one at 165 and other one at 164 will that work? Or bit more fait to about 162 or 160




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  Reply # 314439 3-Apr-2010 17:42
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If Sky uses two sats, you would need either two dishes or two LNBs, and then switch between them manually. It would cost both you and Sky a ludicrous amount of money just to avoid an outage of like half an hour a year total during the middle of the day.



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  Reply # 314454 3-Apr-2010 18:47
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i dont really care about 10 mins loss of sky during the day as im never home, im at work.

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  Reply # 314617 4-Apr-2010 10:18
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Jarno: If Sky uses two sats, you would need either two dishes or two LNBs, and then switch between them manually. It would cost both you and Sky a ludicrous amount of money just to avoid an outage of like half an hour a year total during the middle of the day.


Sky has the option of using two satellites.
They are 8° apart in the orbital slot , so the sun wont be lined up behind them both.
You dont need two dishes , but they also dont have enough capacity to transfer all of D1
over to D3 even temporarily , so it's a moot point

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  Reply # 314628 4-Apr-2010 10:48
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As I understand it that currently if D1 was to fall over their is no way the current boxs (due to lack of firmware strategy) can swap to D3 without user intervention, so D3 as a backup is a bit of a moot point all round.

Cyril

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  Reply # 314917 5-Apr-2010 11:26
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gareth41: i dont really care about 10 mins loss of sky during the day as im never home, im at work.


Same here, and if you were home - hell, make a coffee and read the paper for 10 mins. It's not the end of the world.

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