Curious GPS Interference- Possible causes

Discussion in 'General Announcements' started by KB0MNM, Jun 14, 2020.

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  1. K6CLS

    K6CLS Ham Member QRZ Page

    I hope no one considers the thread closed or done, I'd like folks to post new updated and more specific info as it becomes available.
     
    KO4LZ likes this.
  2. KB0MNM

    KB0MNM Ham Member QRZ Page

    The reason that I was considering 'done' was because other than the latest replies, *Only KA0HCP* was good enough to comment on the theories that I expected might apply. If this were to be moved over to "News", rather than "General Announcements"- some folks might complain that it is not truly amateur radio. Yet the news of developments in the "Curious GPS interference" falls in three categories: 1. Reports of activities which might be classified as interference ( either intentional or by new sources ) to GPS reports through AIS ( or for that matter- any positioning system which generally works unless the antenna is shielded ). 2. Reports of the sources along with evidence given through official or independent observers. Note: the ARRL had/has a program of independent observers for amateur radio concerns. 3. Actions of groups approaching the F.C.C. and other authorities in the matters of frequency allocations in the GPS "L-band" /"Guard Band" range. Since #2 above includes the word evidence, it might be a much larger burden to provide- yet some of that is already found in the form of a table in the cited article. There are plenty of reports that the overall RFI/EMI 'noise floor' continues to increase worldwide, which is not what this 'thread' was supposed to be seeking- rather to explore what a few folks can monitor and report on.
    Maybe there is someone ( such as yourself ) that would care to 'restart this thread', given the same initial information. It seems safe to say that both the older ( non-crypto coded ) Global Positioning Systems in the L-Band and AIS systems in the VHF band are being intentionally interfered with. The real crux of the matter is whether or not there is something that we as amateur radio operators can do to preserve the GPS system as viable APRS reference. Since many are already providing weather reports and assisting public safety in 'parade' type events, I am certainly with K6CLS on preserving the thread- just not sure that someone else should 'restart' it , given what has been said about AIS having been 'hacked' or 'spoofed'.
     
  3. KB0MNM

    KB0MNM Ham Member QRZ Page

    As requested:
    https://www.gpsworld.com/year-long-ocean-cruise-finds-gnss-interference-everywhere/ ( Related to efforts 2 years ago, not the specific 'circling', yet related positioning interference info )
    and
    https://www.gpsworld.com/fcc-grants-e911-galileo-request-to-att/ ( Pertains to cellular location and other than USA GPS systems for location accuracy )
    and
    https://www.gpsworld.com/u-blox-technology-platforms-support-beidou-3/ ( Pertains to one other positioning system- not the same as USA GPS, same purpose - vendor )
    and
    https://www.gpsworld.com/white-house-office-asks-what-to-research-to-protect-gps/ ( No comment here- reminder- we try to stay neutral on politics.... )
    Go for it ( feel free to keep posting... ). Or start again...
     
  4. KB0MNM

    KB0MNM Ham Member QRZ Page

    I have locked a private discussion group on this subject for cause ( no way to drop a single member who did not want additional information ). Please let me know if any of you know of funding regarding that last link. There should be a way to use the pre-existing GPS (the U.S. based one, not Beidou, Glonass, Magellan, etc.) system in a way that affords more immunity to interference. Since surveyors also use land stations for D.G.P.S., why not see about adding additional reference stations and better dual-frequency receivers for all authorized users? Cost.
     
  5. KB0MNM

    KB0MNM Ham Member QRZ Page

    Today's report on Fox26 regarding hidden prisons and COVID-19 C/O Marie Baritromo(sp) could get things started... There is a time for everything.... (plagerism from Ecclesiastes). Be careful what you wish for. They seldom call us 'old fossils' back in the first 'draft'. Numbers 6, 24-26.
     
  6. K6CLS

    K6CLS Ham Member QRZ Page

    Hi Jon, I was intrigued by the discussion group. I thought you chose a good bunch of fellows. I looked forward to some thoughtful. informative responses, and a vigorous discussion.

    The one who didn't want more info has repeatedly demonstrated he is immune to facts and logic. Curiously for someone with a post graduate degree, also seems to be unwilling or unable to read.

    For your part, when posting ... paragraphs are your friend. Put blank lines between each idea. Much easier to read. Many people are defeated by the "wall of text" and don't even try.

    OK back on topic .... it's good to document GPS interference., seems to occur much more frequently these days. More coinstellations won't help (GLONASS, Galileo, Baidu).

    I like the idea of reviving LORAN, especially e-LORAN. It was very short sighted to dismantle the transmitting sites. That cost the USCG more than several years of operation al costs. $0.01 wise, $1.00 foolish.
     
    KB0MNM likes this.
  7. KB0MNM

    KB0MNM Ham Member QRZ Page

    The irony of that last one: https://www.gpsworld.com/white-house-office-asks-what-to-research-to-protect-gps/

    And then I noted the spelling of Baidu. If I am not mistaken, that goes with an actress/singer name: Erika Baidu or similar. As we draw near to 'All Hallowed Eve', I remember her in some haunting roles. That too ( re: Beidou Positioning, sponsor country ) and politics might be ironic. Many may fail to see that connection, because the history goes back...
     
  8. KB0MNM

    KB0MNM Ham Member QRZ Page

    The name that I thought K6CLS was using for Beidou would be Erykah Badu*. Prior to various awards, she acted in certain movies Which might make folks believe in the occult. In truth, no one is without sin- and that was some pretty good acting- though the reviews were mixed. Name changed from Erica... of course!

    Getting back to the subject at hand, the first post here ( interference ) had a second link ( FCC actions ) which also borders on the political. The testimony reported/reporting is the ironic part.
     

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