101w Wobbling? (1 Viewer)

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Captain Midnight

SatelliteGuys Pro
Sep 16, 2019
447
297
Greers Ferry, Arkansas
I am watching 101w and noticing the last hour, my signal has been fading in and out. I've been able to get it back by bumping the dish a few counts east, then west. It's like the satellite is moving back and forth. Anyone else notice this?
 
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mr_rye89

SatelliteGuys Family
Pub Member / Supporter
Jul 5, 2020
119
114
Central New Mexico
Haven't noticed, or I don't think I have...... I've had to bump it west due to high winds I think. 101 is close to the top of the arc for me and is pretty stable (for me)
 

iBoston

SatelliteGuys Pro
Jul 15, 2014
2,103
1,396
North Central
101w has been problematic for me for years. I gave up and this year played satellite musical chairs and put my 12' on it. Problem finally solved, but I wish they would junk the Sat too!
 

Inclined Orbit

SatelliteGuys Pro
Jan 2, 2018
420
249
Los Angeles
You can always call the satellite provider and ask if there are any problems with the spacecraft that would cause the symptoms you are seeing. I've called Intelsat in the past and it turned out there were problems with the satellite. Its best to call and say something like "this is Bob from XYZ cable TV in Podunk and we have been experiencing varying signal strength on several downlinks", etc.
 
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johnnynobody

Star Trek fan
Aug 2, 2009
6,748
1,237
USA
I am watching 101w and noticing the last hour, my signal has been fading in and out. I've been able to get it back by bumping the dish a few counts east, then west. It's like the satellite is moving back and forth. Anyone else notice this?
Last time I checked, the satellites move in a figure of 8 pattern known as "the box". There might be enough movement to cause this to be a problem on "small" dishes. We had a lot of problems with Ku back in the 80's because of this - even with 6 meter dishes.
 
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Comptech

SatelliteGuys Pro
Jun 26, 2006
3,003
2,222
Travelers Rest SC
!0 foot unimesh perforated here and can promise the sat's have not moved. Looking into a forest 101 and 103 both are at 15+SNR and all with -21 to -24 Dbm.
 

Inclined Orbit

SatelliteGuys Pro
Jan 2, 2018
420
249
Los Angeles
Last time I checked, the satellites move in a figure of 8 pattern known as "the box". There might be enough movement to cause this to be a problem on "small" dishes. We had a lot of problems with Ku back in the 80's because of this - even with 6 meter dishes.
Yes they go in a figure 8 pattern that gets larger and larger then about every 2 weeks they perform maneuvers to put it back in center of box. If fuel is getting low the pattern may get larger as the spacecraft owner tries to extend its life and conserve fuel. Small dishes up to a few meters are not a problem for a healthy satellite but larger dishes around 6-7 meters and up usually need to track. I had a 7m Ku dish at a low look angle that I locked down at center of box and it ran for years without tracking. The beacon levels varied about a half dB here and there worst case. I had larger dishes, 11 and 13m that had to constantly track otherwise they could drop a couple dB in level over 8hrs when the spacecraft is at its worst inclination before station keeping maneuvers. I think the half power beamwidth on the 13m at Ku was around .11 degrees.
 
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