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Guest Message by DevFuse

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D* requests FCC OK for 7S sat. move


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24 replies to this topic

#21 OFFLINE   moonman

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Posted 06 July 2006 - 08:49 AM

Just for fun :)

Geo orbit, ie R: ~22.000 miles
One round at the orbit L: ~138160 miles (2p*R)
One degree diff: d: ~380 miles
.15 of this ~ 57 miles

.05 of 1 degree ~19 miles

Now tell me again about 'debries' or 'blocking signals' :D

------------------
The Dish Network "AMC 16 & EchoStar" is also in the 119 slot.
The FFC has to keep track of possible interference with other communications. The azimuth offset between the three LNBFs is fixed on the receive dish--pan one to the left or right, you pan them all. Declination can be adjusted to match the arc and therefore align that somewhat independantly, but not AZ/EL.
Geo orbit is 23,000 miles=60 miles movement.
Many people are reporting poor reception from this bird via D* service.
I don't have the answer as to why they are requesting to move it, unless
they have discovered after the fact that the multi sat dishes were actually designed for 119.05 originally.(just a thought not factual statement). A move
beyond what they requested, would degrade reception, not improve it as they
have stated the move would do. (they would have to realign everone's dish,
an expensive result)

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#22 OFFLINE   P Smith

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Posted 06 July 2006 - 11:41 AM

"Geo orbit is 23,000 miles=60 miles movement" - what is that mean ? Other wrong numbers ?
You can't give straight answers, so the discussion come to the end.

#23 OFFLINE   moonman

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Posted 06 July 2006 - 12:15 PM

Thank Goodness for the "Ignore" button...........:)

#24 OFFLINE   aegrotatio

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Posted 06 July 2006 - 12:40 PM

The move is intended to place 7S closer to where the older multi-satellite dishes can get better gain. The gain on the ParaTodo/Phase2/Phase2-with-SATC is not particularly good (think of it as DirecTV's version of the DiSH 1000 mistake). The new DirecTV "Phase 3" is more forgiving and has a wider focus for both 110 and 119. Moving the 7S its new location is intended to help customers on ParaTodos/Phase2/Phase2-with-SATC get better gain by slightly reducing the spread. This will especially help those areas close to the fringe of spotbeams on 7S. Phase 3 dishes will just see a better signal overall. ParaTodos/Phase2/SatC Mod dishes will get much higher SQ and less rain fade.

No re-aiming will be necessary but it will make peaking for 119 much more easy--perhaps some customers with complaints after the move will be re-peaked.
There is some concern about neighboring Echostar but not at 119-degrees (it was specifically with 110).
All this talk about space debris, neighboring objects, etc. is nonsense.

#25 OFFLINE   moonman

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Posted 06 July 2006 - 12:52 PM

The move is intended to place 7S closer to where the older multi-satellite dishes can get better gain. The gain on the ParaTodo/Phase2/Phase2-with-SATC is not particularly good (think of it as DirecTV's version of the DiSH 1000 mistake). The new DirecTV "Phase 3" is more forgiving and has a wider focus for both 110 and 119. Moving the 7S its new location is intended to help customers on ParaTodos/Phase2/Phase2-with-SATC get better gain by slightly reducing the spread. This will especially help those areas close to the fringe of spotbeams on 7S. Phase 3 dishes will just see a better signal overall. ParaTodos/Phase2/SatC Mod dishes will get much higher SQ and less rain fade.

No re-aiming will be necessary but it will make peaking for 119 much more easy--perhaps some customers with complaints after the move will be re-peaked.
There is some concern about neighboring Echostar but not at 119-degrees (it was specifically with 110).
All this talk about space debris, neighboring objects, etc. is nonsense.

--------------------------
Well at least this makes some sense of it all.....I have the oval with sat c kit
added and as you say, reception can be marginal at best..thanks for the
clarify......




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