GPS satellites
- Thread starter MaKrak
- Start date
Hi, welcome to the forum. I would suggest that you try Google Search and Google Scholar and talk to your local library who should be able to help you locate appropriate texts.
- Thread Starter Thread Starter
- #3
Thank you for your response, but I have reviewed many books and wasn't found anything. That's why I asked for help on this forum.
No probs. If that's the case then the information must be restricted and as such would not be available publicly. In that case it most definitely would not be discussed in this forum.
2007yellow430
Active Member
You might start here. Use the reference section to see what has been published. Hope this helps:
https://en.m.wikipedia.org/wiki/GPS_satellite_blocks
Art
https://en.m.wikipedia.org/wiki/GPS_satellite_blocks
Art
2007yellow430
Active Member
pm me. One of my clients and friends was instrumental in establishing the satellite system. I'll ask him if he'll agree to chat with you.
Art
John Fedup
The Bunker Group
Another interesting project by SpaceX, Starlink, a constellation of low orbit small satellites for worldwide access to the internet. It would be a potential entry through China’s “Great Firewall”. The system could also be a backup to GPS as described in the link.
https://www.realcleardefense.com/ar..._the_strategic_satellite_solution_113273.html
https://www.realcleardefense.com/ar..._the_strategic_satellite_solution_113273.html
John Fedup
The Bunker Group
Although LM is launching a new generation of GPS satellites which are 8 times more resistant to jamming, the US is working on backup technology. The link below discusses some options.
No GPS? No problem, there are increasingly more options - SpaceNews.com
No GPS? No problem, there are increasingly more options - SpaceNews.com
John Fedup
The Bunker Group
This article discusses recent GPS disruptions and the civilian consequences of GPS warfare. I was not aware of the cheap commercial GPS jammers. I guess we shouldn’t be surprised as there must be a huge market consisting of employees who don’t want their movements micromanaged by employers.
The GPS Wars Are Here
The GPS Wars Are Here
Earl B. Doolittle
New Member
I recommend the
Global Positioning System
Signals, Measurements, and Performance book
i think this book would be very helpful for you.
G'day @Earl B. Doolittle Welcome to the forum. Please read the rules. Do you have the authors name etc., for that book? It just makes it easier for people to track down.
John Fedup
The Bunker Group
Apparently DoD and most commercial GPS users are upset about the FCC’s decision to allow Ligado to use the L-band spectrum for their terrestrial 5G network. This is claimed to be a real noise problem for GPS reception. If this is the case then it is beyond that the FCC signed off on this request.
breakingdefense.com
DoD Pushes To Reverse FCC OK Of Ligado 5G Network - Breaking Defense
"The impact is significant, and it's unacceptable," Gen. Jay Raymond told the Senate Armed Services Committee.
breakingdefense.com
buffy9
Well-Known Member
Apparently DoD and most commercial GPS users are upset about the FCC’s decision to allow Ligado to use the L-band spectrum for their terrestrial 5G network. This is claimed to be a real noise problem for GPS reception. If this is the case then it is beyond that the FCC signed off on this request.
DoD Pushes To Reverse FCC OK Of Ligado 5G Network - Breaking Defense
"The impact is significant, and it's unacceptable," Gen. Jay Raymond told the Senate Armed Services Committee.
US military is furious at FCC over 5G plan that could interfere with GPS
FCC accuses military of “baseless fear-mongering” in fight over Ligado network.
arstechnica.com
Another article on the situation. It would seem concessions will have to be made for 5G, barring any major breakthrough in technology. The FCC is going to be hard pressed to argue with major departments, including the DoD.
I imagine the situation would hinder the roll-out of 5G elsewhere also if the decision did go ahead. It's hard to sell 5G infrastructure to a country when they risk losing GPS as a result.
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John Fedup
The Bunker Group
I would think the blowback from private auto users of GPS will be enormous if their systems are screwed with. Some cars can use cell towers for navigation but I believe this requires a data plan. In Canada this is about $60-$90 per month whereas GPS is zero. Cell coverage is minimal for large regions of the country. Mind you, 5G here is a ways off. Maybe better solutions will emerge.
Todjaeger
Potstirrer
Unfortunately some of the approaches to 5G have also been shown to be problematic with the uplink between some NASA and NOAA satellites, with those depts. also complaining to the FCC I believe. Which is both concerning and disconcerting since some of the impacted satellites are weather surveillance satellites that are used to collect data on storms, storm formation, and probable storm tracks. Imagine if all of a sudden, the NWS suddenly could no longer give residents of a region an advisory that in a week they were likely to be impacted by a major storm. Instead, this gets replaced by a much smaller window were residents are only given maybe 72 or 48 hours notice that a major storm was about to hit. And when I mean a major storm, I mean things like a large area (multi-state) blizzard, or a hurricane.
@Todjaeger Can't the FCC ruling be overturned on national security grounds?
Todjaeger
Potstirrer
Hard to say. I cannot think of a comparable example which would provide guidance. It could potentially turn into legal battle in the Federal court system, possibly between impacted gov't agencies and departments like DOD, NRO, NSA, NASA, et. al. and the FCC, or between those impacted and companies trying to roll out 5G systems, or a combination of the above.
The FCC is the body with authority for the US of RF spectrum in the US, and this includes spectrum used for national security. What I am wary of is whether or not ties between some of the FCC commissioners and potential 5G vendors/operators will influence the decisions.
John Fedup
The Bunker Group
Here’s an article describing the utilization of earth’s magnetic field as an alternative to GPS. Although accuracy is 10 meters versus GPS’s 3 meters, this alternative should be less vulnerable to jamming and no worries about kit being destroyed.
www.defenseone.com
The Air Force’s Latest GPS Alternative: Earth’s Magnetic Fields
Officials just launched a public challenge to help create the artificial intelligence needed to turn the planet’s magnetic fields into readable maps.
www.defenseone.com