[time-nuts] eLORAN will be on the air GRI 99600

[Bob kb8tq]

Hi

> On Aug 6, 2020, at 4:40 PM, jimlux <jimlux at earthlink.net> wrote:
> 
> On 8/6/20 9:17 AM, Taka Kamiya via time-nuts wrote:
>> Someone in this thread mentioned "at least 2 satellite time and frequency solutions" exists already.  I only know of GPS (GNSS) constellations.  What's the other?
> 
> Transit?
> 
> I don't believe they are still operational, though.
> 
> 
> I wonder if one might be able to pick up time/frequency from a commercial TV broadcast transponder.  The transponders on the satellite are typically bent pipes (for C-band anyway), I would assume that the uplinks may or may not have stability comparable to terrestrial broadcast.
> 
> One problem is, of course, that the satellites aren't in a stable location (at least on a "meters" scale) - but one could certainly do "common view" kinds of time transfer.

Another couple of “up in the air” question:

Some of the systems transmit “stand alone” signals in each of two or three different bands. Does each
band count as a separate time source? 

If you know your location already, each sat in these systems can be a time source all by it’s self. Do they 
each count?

I guess is depends a lot on just how you look at redundancy ….

Bob


> 
> 
> 
> 
>> ---------------------------------------
>> (Mr.) Taka Kamiya
>> KB4EMF / ex JF2DKG
>>       On Thursday, August 6, 2020, 12:01:27 PM EDT, paul swed <paulswedb at gmail.com> wrote:
>>    Magnus
>> Its honestly by luck that I know anything. From the bits I have read Europe
>> seems far closer to eLORAN then we are. Perhaps 6 months ago the US
>> performed a series of tests 2 eLoran solutions and something like 6 or more
>> satellite solutions. I know the old Iridium satellites were in the tests
>> and some other LEO satellites.
>> But thats about it.
>> What we need is a cheap SDR LORAN C sniffer. Low power runs 24 X 7 and
>> turns a LED on if the stations active.
>> Oh well another project in the someday pile.
>> Regards
>> Paul
>> WB8TSL
>> On Thu, Aug 6, 2020 at 2:42 AM Magnus Danielson <magnus at rubidium.se> wrote:
>>> Hi Paul,
>>> 
>>> I only ask as you seem to track this thing the best here on time-nuts,
>>> as far as I have seen, such that it is your emails that keeps me best up
>>> to date with the progress.
>>> 
>>> Cheers,
>>> Magnus
>>> 
>>> On 2020-08-05 19:21, paul swed wrote:
>>>> Hi Magnus been a while since have emailed.
>>>> Its one site that was a test transmitter. Its in New Jersey, USA.
>>>> The goal of the testing I believe is to establish the viability of an
>>>> alternate PNT reference to GPS. Additionally the ability to communicate
>>>> some level of message broadcast. This should be identical to proposals I
>>>> have heard of in Europe.
>>>> But I have no direct relationship to any of this. Like you, a very
>>>> interested observer and hope that eLORAN wins the battle.
>>>> Unfortunately there are many alternate proposals such as using other
>>>> satellites. Hmmm if I wanted to advance my career in the Air Force or
>>> Space
>>>> Force (Yes thats actually real now).
>>>> Would I select the lowly reliable as heck eLORAN at sub $100 M/year to
>>>> operate. Or the glorious space based proposals in $B region. Never mind
>>>> that at least 3 countries now have demonstrated killer satellites.
>>>> Sorry for that editorial.
>>>> Regards
>>>> Paul
>>>> WB8TSL
>>>> 
>>>> On Wed, Aug 5, 2020 at 11:04 AM Magnus Danielson <magnus at rubidium.se>
>>> wrote:
>>>> 
>>>>> Hi,
>>>>> 
>>>>> Do you know that they would do test with two actual transmitter sites?
>>>>> 
>>>>> Cheers,
>>>>> Magnus
>>>>> 
>>>>> On 2020-08-05 16:00, paul swed wrote:
>>>>>> Hello to fellow time nuts.
>>>>>> Warm up those old Austrons. eLORAN out of New Jersey has been on the
>>> air
>>>>>> intermittently prior to a test run next week. Due to the storm they
>>> have
>>>>>> lost power and should have it back today or tomorrow.
>>>>>> The intention will be on the air operation till the 20th. That's a long
>>>>>> run. Nice.
>>>>>> Seems the Austron 2100s can be had for reasonable money these days
>>> also.
>>>>>> Enjoy.
>>>>>> Paul
>>>>>> WB8TSL
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