[Boatanchors] LORAN A Revisited

[J. Forster]

GPS is suceptible to interferance, multipath, attenuation due to foliage,
jamming, and spoofing.

LORAN-C, because of the much higher peak power, is far less at risk.

The only other backup, WWVB, has gone to a BPSK format, requiring all new
gear.

-John

=================


> GPS goes wonky?
>
> I only have it "slip" a gear - per se, *IF* I go through a tunnel.
>
> The remainder of the time it has acquired more than enough satellites.
>
> John - you need to update your GPS.  I'm using a Garmin NUVI 1300.
>
> I also use a Garmin made for flying when I am in a private aircraft.
> NEVER had it go *wonky*, whatever that is.
>
> Bob - N0DGN
>
> On 1/25/2013 12:05 PM, J. Forster wrote:
>> The shutdown of LORAN-C in favor of GPS only is one of the stupidest
>> moves
>> ever. If GPS goes wonky, and it does, there is no backup at all.
>>
>> YMMV,
>>
>> -John
>>
>> ===============
>>
>>
>>> LORAN A used to be the nemisis of 160 meter operation here at one time.
>>> New
>>> Orleans was in a sector of the coast where NO operation was allowed on
>>> 160
>>> meters at all.
>>> The sound is quite familiar but a bit "softer" in sound than I
>>> remember.
>>> Gee it has been maybe 60 years sine I heard that sound!
>>>
>>> After the LORAN A went QRT and LORAN C became popular on 100 khz. it
>>> was
>>> used a lot by helicopters to fund oil drilling platforms in the Gulf of
>>> Mexico, until the serious advent of GPS, which torpedoed all the other
>>> navigation systems which paled in comparison.
>>>
>>> 73,
>>>
>>> Sandy W5TVW
>>>
>>> -----Original Message-----
>>> From: Drew P.
>>> Sent: Thursday, January 24, 2013 10:46 PM
>>> To: boatanchors at mailman.qth.net
>>> Subject: [Boatanchors] LORAN A Revisited
>>>
>>> Hi All,
>>>
>>> A while back there was a thread in this forum starting with GPS
>>> interference
>>> from LightSquared, progressing to LORAN A, and culminating in wistful
>>> recollections of the sound of LORAN A as heard in a radio receiver.  As
>>> we
>>> know, the LORAN A system in the US went dark over 30 years ago.  One
>>> forum
>>> participant expressed a wish that he had a recording of LORAN A so
>>> heard.
>>>
>>> I have found an audio clip of a simulation of the sound of LORAN-A. It
>>> has
>>> the "flanging" characteristic of a channel having 2 stations of
>>> differing
>>> pulse repetition rates.  Even though the timbre is a little off
>>> (probably
>>> from ringing in the IFT's of the various tube radios I used back in the
>>> day)
>>> from the way I remember it, it is still quite good. Here it is for your
>>> edification and enjoyment.
>>>
>>> http://alancordwell.co.uk/radio/soundclips/Loran_A_sim.mp3
>>>
>>> Drew
>>>
>
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