BUD alignment (1 Viewer)

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johnnynobody

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Aug 2, 2009
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42N 103W
This is odd - my location is 103.6W longitude so I figured that I should pick up 103W (SES3) to the east of true south. However, I'm picking it up to the west of true south. Am I right that the dish should point to east of true south when looking at 103.0 W from my location? The pole is plumb and the feed is centered. dishpointer.com says the dish should be pointing at azimuth 179.0 degrees true which is east of true south - am I right or am I wrong?
 

goaliebob99

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Supporting Founder
Aug 5, 2004
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Correct it should be looking east. Perhaps your dish was moved a bit as that tends to happen with wind over time. I have had mine move on the pole like that. I had to re-adjust it.
 

johnnynobody

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Aug 2, 2009
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42N 103W
Well, I realigned the antenna today & SQ has greatly increased and the antenna, so far, is tracking the arc. I haven't checked all viewable sats from my location but the SQ meter in Kaffeine is showing SQ's greater than 80 on all sats. During realignment 2 sats were showing SQ greater than 75 on my Birdog. So, this is a mystery to me as to why I'm picking up SES3 west of true south instead of east. I've confirmed the longitude of my location with Google maps, Sportrac Map GPS receiver, and the coordinates put into dishpointer.com shows my location. Strange.
 

Titanium

AI6US
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May 23, 2013
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Meadow Vista, Northern California
Use a solar calculator to provide the date and time the sun is at the apex for your location. The feedhorn shadow will indicate the true dish orientation. Here is an example screen capture from an iOS app "Mr. Sun" showing the exact sun position for a given date, time and location.
IMG_5137.JPG



My guess is that the magnetic declination may be slightly off in your area. Quite common to have magnetic variances.
 

a33

SatelliteGuys Pro
Feb 4, 2015
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netherlands europe
Also when the LNB arm is not exactly perpendicular to the dish, you would receive a satellite at an unexpected angle.
Might that be the case?
I've seen it once in a topic...

Greetz,
A33
 

wvman

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Sep 19, 2014
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N. Central WV
Use a solar calculator to provide the date and time the sun is at the apex for your location. The feedhorn shadow will indicate the true dish orientation. Here is an example screen capture from an iOS app "Mr. Sun" showing the exact sun position for a given date, time and location.
View attachment 124267


My guess is that the magnetic declination may be slightly off in your area. Quite common to have magnetic variances.

I just tried to get it and it said it's no longer available. :)
 

johnnynobody

Thread Starter
SatelliteGuys Master
Pub Member / Supporter
Aug 2, 2009
6,643
1,202
42N 103W
Use a solar calculator to provide the date and time the sun is at the apex for your location. The feedhorn shadow will indicate the true dish orientation. Here is an example screen capture from an iOS app "Mr. Sun" showing the exact sun position for a given date, time and location.
View attachment 124267


My guess is that the magnetic declination may be slightly off in your area. Quite common to have magnetic variances.

When the sun comes back I'll give it a try. But, it appears that my dish is tracking the arc OK which is something I wouldn't expect if something wasn't correctly aligned.
 
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wagonman76

Well-Known SatelliteGuys Member
Nov 11, 2006
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Are you by chance using the arc only one side of center? If so then the arc can be tracked pretty well (good enough for most reception) even if the dish rotation on the pole is off. Of course the other adjustments will be off as well to compensate. Mine was set up this way at the old house for many years and since I couldn't see the east half, I never knew. 85W was center and that's where the woods cut off the view. I got 80 quality across the arc but that's all my Traxis would show. 99 quality on the old 4DTV. At the new house I can see more to the east, and have a much easier way of making adjustments, so I took more time to make sure I see the arc better.
 
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