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Added image of the SAME aircraft displaying the same behavior at a later day, to re-confirm problems w/ that specific plane
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KORD4me
KORD4me
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I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

Tail # N657UA Boeing 767-300 Typical route between EGLL and KORD

Time of occurrence is approximately: 3/16/2014 6:09pm CST

I have also verified FlightAware is ALSO showing the same weird glitch.

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

UPDATE:

This seems to be related to THIS aircraft. The explanations given (GPS->INS->GPS switching) still applies in my opinion, but wanted to give another screen shot. Here it is today (3/30/2014) and again displaying this behavior - should their maintenance department be alerted to adjust their GPS antenna?? enter image description here

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

Tail # N657UA Boeing 767-300 Typical route between EGLL and KORD

Time of occurrence is approximately: 3/16/2014 6:09pm CST

I have also verified FlightAware is ALSO showing the same weird glitch.

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

Tail # N657UA Boeing 767-300 Typical route between EGLL and KORD

Time of occurrence is approximately: 3/16/2014 6:09pm CST

I have also verified FlightAware is ALSO showing the same weird glitch.

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

UPDATE:

This seems to be related to THIS aircraft. The explanations given (GPS->INS->GPS switching) still applies in my opinion, but wanted to give another screen shot. Here it is today (3/30/2014) and again displaying this behavior - should their maintenance department be alerted to adjust their GPS antenna?? enter image description here

Post Closed as "Duplicate" by Jan Hudec, Danny Beckett, casey, SSumner, egid
Tweeted twitter.com/#!/StackAviation/status/445857434964623360
added 208 characters in body
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KORD4me
KORD4me
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I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

Tail # N657UA Boeing 767-300 Typical route between EGLL and KORD

Time of occurrence is approximately: 3/16/2014 6:09pm CST

I have also verified FlightAware is ALSO showing the same weird glitch.

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior.

  1. Does anybody have any thoughts as to what may be happening???
  2. Why is the "skew" at seemingly same angle? Is that anything?
  3. In light of MH370, does this happen often, how reliable is that GPS data?

Tail # N657UA Boeing 767-300 Typical route between EGLL and KORD

Time of occurrence is approximately: 3/16/2014 6:09pm CST

I have also verified FlightAware is ALSO showing the same weird glitch.

See below "yellow" highlighted airplane: enter image description here

Same A/C from FlightRadar24: enter image description here

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Danny Beckett
Danny Beckett
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KORD4me
KORD4me
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