What does this tell me?

[roaniecowpony]

Well now I have to go look because I'm 99% sure I do not have an active aircard. I added a 8.4" uConnect setup after the fact and my navigation works fine. Jeep doesn't want to activate my Guardian system as it was not factory installed. I know one of the first steps is to activate that aircard.

Just a reference point. My 2014 GMC has not had a paid cell service or Onstar account other than the freebee when new. Yet, when I push the red emergency button, an Onstar operator answers with "Onstar emergency services. How can I help you?" I test it about once a year to see if it's cut off.

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[TimmH]

GPS signals do not track anything, they are signals that are received by a device/receiver, that can help that device/receiver identify it's location based on those signals it receives.

It is the end user device and or software in such device that may or may not send tracking data to a third party.

Most GPS map devices/software will store maps of your local area, for times when a data connection is interrupted, and therefore allow you to maintain a "map background" to the display. Depending on the device and internal memory you could outdrive the locally store maps and therefore drive into blank space.

 

[BDinTX]

Green bars are part of GPS and blue bars are part of GLONASS

That may be the case, but why do you say that?
I observed the "Available" number staying in lockstep with the number of green bars.
It started with 9 green bars, three blue and it showed Available: 9
A few seconds later 11 green bars, 1 blue and it showed Available: 11

If what you're saying is correct it would imply that it is only able to track 12 satellites and it ignores the GLONASS ones. I don't see the value in tracking a satellite it can't use.

 

[RAMSTEEL]

That may be the case, but why do you say that?
I observed the "Available" number staying in lockstep with the number of green bars.
It started with 9 green bars, three blue and it showed Available: 9
A few seconds later 11 green bars, 1 blue and it showed Available: 11

If what you're saying is correct it would imply that it is only able to track 12 satellites and it ignores the GLONASS ones. I don't see the value in tracking a satellite it can't use.

It may have to do with the position relative to your location but I suspect it's operations in Ukraine that have turned those off for our use? No clue. I would have to research that but I suspect it's related to current events or supports Jeeps that are outside the US. The system should be reseeking whatever satellites are available to improve accuracy.

Global Navigation Satellite Systems (GNSS)
A GPS is considered to be a Global Navigation Satellite System (GNSS) — meaning it is a satellite navigation system with global coverage. As of 2020, there are two fully operational global navigation satellite systems: the U.S. navigation signal timing and ranging (NAVSTAR) GPS and Russia’s Global Navigation Satellite System (GLONASS). The NAVSTAR GPS consists of 32 satellites owned by the U.S. and is the best-known and most widely-utilised satellite system. Russia’s GLONASS consists of 24 operational satellites with three remaining as spares or in testing.

Source - https://www.geotab.com/blog/what-is-gps/

 

[Nitehawk92]

An undercover NSA agent would say...

Ask Alexa and see want she says about this...

 

[JeepFiend]

Ask Alexa and see want she says about this...

So I can find out what something actively working for the NSA would say?

 

[RAMSTEEL]

I checked mine and it's tracking 11 to 12 with the occasional GLONASS sat showing on the 12th position. I suspect it's only appearing because of strength and is not available. Probably programmed to use any of the three major sat systems in the event US deals with Russia on it.

Last note, you only need 4 satellites to have GPS function correctly so the rest is gravy.

 

[Spank]

Well now I have to go look because I'm 99% sure I do not have an active aircard. I added a 8.4" uConnect setup after the fact and my navigation works fine. Jeep doesn't want to activate my Guardian system as it was not factory installed. I know one of the first steps is to activate that aircard.

The aircard doesn't have to be connected to any services to function. I don't have any subscriptions or services active either and my free trial of Guardian expired years ago. However, when I replaced my faulty alternator just a couple months ago, my radio phoned home and sent data to Mopar which e-mailed me about a fault in the charging system.

 

[BDinTX]

It may have to do with the position relative to your location but I suspect it's operations in Ukraine that have turned those off for our use? No clue. I would have to research that but I suspect it's related to current events or supports Jeeps that are outside the US. The system should be reseeking whatever satellites are available to improve accuracy.

Global Navigation Satellite Systems (GNSS)
A GPS is considered to be a Global Navigation Satellite System (GNSS) — meaning it is a satellite navigation system with global coverage. As of 2020, there are two fully operational global navigation satellite systems: the U.S. navigation signal timing and ranging (NAVSTAR) GPS and Russia’s Global Navigation Satellite System (GLONASS). The NAVSTAR GPS consists of 32 satellites owned by the U.S. and is the best-known and most widely-utilised satellite system. Russia’s GLONASS consists of 24 operational satellites with three remaining as spares or in testing.

Source - https://www.geotab.com/blog/what-is-gps/

Hmm good info. Still trying to makes sense of the numbers at the bottom of each bar in the chart. Was trying to map it to either SVN or PRN but neither works. Thx for sharing that.

 

[RAMSTEEL]

Hmm good info. Still trying to makes sense of the numbers at the bottom of each bar in the chart. Was trying to map it to either SVN or PRN but neither works. Thx for sharing that.

https://www.gps.gov/systems/gps/space/#generations

Lots of good stuff here and they rotate operational satellites so not all of them are online at once.

I think the numbers are the SVN, and those numbers appear to be reused as the older sats are retired. Not sure who is updating the list and how frequent.

Update: I'm with you, not sure about numbers. Found an updated site and doesn't match up.

 

[roaniecowpony]

https://www.gps.gov/systems/gps/space/#generations

Lots of good stuff here and they rotate operational satellites so not all of them are online at once.

I think the numbers are the SVN, and those numbers appear to be reused as the older sats are retired. Not sure who is updating the list and how frequent.

The U.S. Space Force operates the GPS system.

 

[TX_Ovrlnd]

Just a reference point. My 2014 GMC has not had a paid cell service or Onstar account other than the freebee when new. Yet, when I push the red emergency button, an Onstar operator answers with "Onstar emergency services. How can I help you?" I test it about once a year to see if it's cut off.

Any device capable of cellular communication has to have the ability to always reach emergency services regardless of subscription. You'd have to yank the device to get rid of it permanently.

That may be the case, but why do you say that?
I observed the "Available" number staying in lockstep with the number of green bars.
It started with 9 green bars, three blue and it showed Available: 9
A few seconds later 11 green bars, 1 blue and it showed Available: 11

If what you're saying is correct it would imply that it is only able to track 12 satellites and it ignores the GLONASS ones. I don't see the value in tracking a satellite it can't use.

Countries have the ability of denying the navigational system code from being received by systems without encryption which could be the case with Russia being at war and denying adversary use to location services. They can jam GPS from the ground and turn off GLONASS to non military systems. (For more info related to this look up SAASM and GPS.) For our own system there are satellites up in the constellation kept as spares. The numbers look to coincide with the PRN. Russia does what Russia wants, but maybe add a 7 in front of the blue numbers and it might be theirs.
Here's the active GPS constellation.
https://celestrak.com/cesium/orbit-...at=/pub/satcat.txt&orbits=32&referenceFrame=1

Here's GLONASS constellation.
https://celestrak.com/cesium/orbit-...at=/pub/satcat.txt&orbits=25&referenceFrame=1

The U.S. Space Force operates the GPS system.

It was ran by the Air Force prior to Space Force taking over.

 

[sherpaJL]

What does this tell me?

Tells me you were on Greenwood Place and parked in a driveway

 

[roaniecowpony]

Any device capable of cellular communication has to have the ability to always reach emergency services regardless of subscription. You'd have to yank the device to get rid of it permanently.


Countries have the ability of denying the navigational system code from being received by systems without encryption which could be the case with Russia being at war and denying adversary use to location services. They can jam GPS from the ground and turn off GLONASS to non military systems. (For more info related to this look up SAASM and GPS.) For our own system there are satellites up in the constellation kept as spares. The numbers look to coincide with the PRN. Russia does what Russia wants, but maybe add a 7 in front of the blue numbers and it might be theirs.
Here's the active GPS constellation.
https://celestrak.com/cesium/orbit-...at=/pub/satcat.txt&orbits=32&referenceFrame=1

Here's GLONASS constellation.
https://celestrak.com/cesium/orbit-...at=/pub/satcat.txt&orbits=25&referenceFrame=1

It was ran by the Air Force prior to Space Force taking over.

I think the origin has ties to system that the navy started in the 60s.

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