[ARC5] A-10 Radios

[Brooke Clarke]

Hi:

The problem is that all these sat nav systems work in what used to be called L-band (1 - 2 GHz) and it's pretty easy to 
make a receiver deaf by noise jamming with low power. and an antenna that's a few inches in size.  The mil receivers 
know they are being jammed and roughly the bearing where it's coming from, but they still are jammed.

LORAN-C, operating at 100 kHz and with the eLORAN updates would be close to GPS in capability and is virtually jam 
proof.  The transmitters are running hundreds of megawatts into a 1000+ foot antenna.  Hard to generate a signal at the 
receiver that can compete with that received power.

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.

-------- Original Message --------
> Hi
>
> Glonass ( the “Russian GPS”) has been running for almost 20 years now. The latest modernization phase started roughly
> 10 years back. It has been fully functional for quite a while. The European Galileo is still in the “get enough sats up there”
> phase. What they have up works ( with a few failures of various sub-systems causing the backups to come on line). The
> Chinese system is a bit further back than that. The Japanese system is up and running with coverage only in a limited area
> (by design). The Indian government is still making noises about doing their own system. We’ll see how that all works out.
>
> Without much effort you can get $10 GPS / Glonass receivers on eBay (USB sticks). They will happily give you a nav solution
> based on either system or on both at once. Many also will do the Chinese and Japanese systems in the part of the world where
> there is coverage. Finding cheap stuff that tosses Galileo into the mix is a bit harder. You probably will have to spend $20 to $30.
>
> If you have the money, you can get multi band (L1/L2/L5) deuces that will work with the big three ( GPS, Galileo, Glonass). That’s
> been true for about 5 years. Why you would pay for the European system when it’s not fully deployed .. hmmm…. ( = that add-on
> may cost about $7,000 alone). If you want to really make it tough on a bad guy, run multi band / multi system. It just costs a
> (gulp ..) little more.
>
> So no, we are not living in a world with only one sat nav system.
>
> Bob
>
>> On Jul 12, 2018, at 9:19 PM, Peter Gottlieb <kb2vtl at gmail.com> wrote:
>>
>> At this point it seems the govt believes that science and reason are not to be trusted so all decisions must be opposite what the subject matter experts say.  So I have close to zero faith they will do the right thing.
>>
>> Is the Russian Glonast system up and running yet?  Is that more robust?  I would think that relying on multiple independent satnav systems would improve the odds that jamming would be detected, etc.
>>
>>
>> On 7/12/2018 8:13 PM, Robert Downs via ARC5 wrote:
>>> So does everyone else with good sense.  Which doesn't mean it won't be done
>>> that way.
>>>
>>> Robert Downs
>>>
>>>
>>> -----Original Message-----
>>> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
>>> Behalf Of Kenneth G. Gordon
>>> Sent: Thursday, July 12, 2018 17:38
>>> To: Francesco Ledda
>>> Cc: 'To: ARC-5'
>>> Subject: Re: [ARC5] A-10 Radios
>>>
>>>
>>> Personally, I think it is a big mistake to put all our navigation eggs in
>>> one basket.
>>>
>>> Ken W7EKB
>>>
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