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Possible GPS blackout next two weeks in Western US
541 12 2018-1-26
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GrangerFX
First Officer
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Return to home may not work suddenly if you are flying your drone in the Western USA over the next two weeks. Please be cautious.
https://www.zerohedge.com/news/2 ... -ever-air-war-drill
2018-1-26
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Labroides
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Australia
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Does it have any effect on Glonass?
If not later DJI drones should be unaffected.
2018-1-26
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GrangerFX
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Labroides Posted at 2018-1-26 19:55
Does it have any effect on Glonass?
If not later DJI drones should be unaffected.

Good point. I wonder if Glonass can work for navigation without any GPS signals? Reading that article makes me think that the military will block all navigation siganls not just GPS. After all if this is a battlefield simulation, you would not want the enemy to switch to Glonass if you block GPS.
2018-1-26
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Genghis9
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Labroides Posted at 2018-1-26 19:55
Does it have any effect on Glonass?
If not later DJI drones should be unaffected.

This is a signals based jamming technology that could effect GLONASS.  However, I suspect for OPSEC purposes they will not intentionally jam those signals unless they are close to the USAF GPS constellation bands.
I would be cautious inside the stated zones identified in the article and ensure you are receiving a good solid signal and homepoint is registered.  One thing that you wont be able to fully determine prior to liftoff is what effect those actions will have when airborne and at higher altitudes.
2018-1-26
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Genghis9
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Thanks for posting this information
2018-1-26
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GrangerFX
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Genghis9 Posted at 2018-1-26 22:29
This is a signals based jamming technology that could effect GLONASS.  However, I suspect for OPSEC purposes they will not intentionally jam those signals unless they are close to the USAF GPS constellation bands.
I would be cautious inside the stated zones identified in the article and ensure you are receiving a good solid signal and homepoint is registered.  One thing that you wont be able to fully determine prior to liftoff is what effect those actions will have when airborne and at higher altitudes.

I get the impression that it could get shut off suddenly, or worse, spoofed. That would make your home point either useless or a huge liability when the drone thinks it is ten miles away from its true location.
2018-1-26
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Genghis9
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Well if you are saying the signal will get cutoff due to jamming yes it could, however, they are not going to turn off the constellations for obvious reasons.  Which is why operating with caution is advised.
Also you are correct, you wont know when these actions will be employed, which makes planning difficult.  The greatest challenge will be anyone attempting to use GPS near Vegas and the NTTR off to the north and northeast of Vegas.  
As to spoofing, the article did not indicate GPS signals may not be accurate so it does not sound like they will be employing those techniques.  While spoofing has some obvious benefits it is also very easy to determine if it is being employed, USAF aircraft do just rely on GPS for navigation and any difference can be realized pretty quickly.  Granted a tasked saturated pilot or crew could get turned around or confused but they would have to ignore several indicators and solely focus on GPS to get spoofed.  All this is to say that spoofing sounds good for a james bond film but in practice it is almost wasted effort when jamming can have a much more direct effect on navigation and weapons employment.
2018-1-26
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RedHotPoker
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Canada
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Flying in ATTI mode with device in Airplane mode... ;-)



RedHotPoker
2018-1-26
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Genghis9
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RedHotPoker Posted at 2018-1-26 22:51
Flying in ATTI mode with device in Airplane mode... ;-)

True
2018-1-26
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RedHotPoker
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Never fear the reaper... Ha

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RedHotPoker
2018-1-26
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Genghis9
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Big Boy Toy
2018-1-26
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RedHotPoker
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It looks fairly easy to assemble. Missiles last... ;-$



RedHotPoker
2018-1-26
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solentlife
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Having been involved in 'exercises' and also sailing in areas that are subject to this interruption ... UK coast has this more often than realised.

The US GPS signal can be either 'offset with serious errors' or signals switched off .... the offset is the more common one.

As to Glonass - as long as the exercise is using disruption of US GPS - then GLONASS should not be affected, unless jamming techniques are used.  But remember that Glonass is heavily influenced by Russian operations, ie during Chechen conflict - coverage was re-aligned to improve that region ..

Not many people know that USA tried to force Europe's Galileo system to be in line with US GPS - that if US Govt required it switched off - Europe would comply without question. As far as I am aware - this was rejected and Galileo (although still not fully operational) will continue operating unless real situation occurs requiring its switch off. Galileo can be picked up by various GPS recvrs ... at this time - most manufacturers do not list if compatible.

At this time .. China, India and Europe are increasing their Satellite navigation coverage - one of the main reasons is that they do not want to rely on another countries system. Particularly that US funding has fallen seriously short on the satellite replacement / maintenance program.

Final point - all these systems have two transmissions ........... one for civilian and not g'teed continued transmission, second is Military and not available to civilian users unless engaged in contract work.

Just pointing out a few things ...

Nigel
2018-1-27
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