Every half hour ???
Andy
On 2 December 2015 at 21:00, <[email protected]> wrote:
> Hi Paul,
>
> That's very helpful. The oscillator needs some work to improve
> our chances.
>
> In the mean time, how about a longer message, more power and shorter
> symbols. 9K19A 1 Second symbols 25 characters 500 watts. 2100 UTC.
>
> 73
> Joe
>
> On Wed, 2 Dec 2015, Paul Nicholson wrote:
>
>>
>> Given a 3 hour VO/VK window,
>>
>>
>>
>> http://abelian.org/ebnaut/calc.php?sndb=15&snbws=92e-6&code=16K21&sp=10&L=1&nc=5&submit=1
>>
>> shows you need to reach 15dB S/N in 92uHz to get a 5 char message
>> across, and
>>
>>
>>
>> http://abelian.org/ebnaut/calc.php?sndb=12.5&snbws=92e-6&code=16K21&sp=12.5&L=1&nc=3&submit=1
>>
>> 12.5dB for a 3 char message.
>>
>> This assumes the path remains stable for 3 hours which is probably
>> optimistic.
>>
>> A 2 char message with 14 second symbols needs S/N 11dB in 92uHz.
>>
>> Everything hinges on that carrier measurement.
>>
>> Markus wrote:
>>
>>> Fewer and weaker decodes than the night before:
>>
>>
>> Here it was better than the previous night,
>>
>> VO1NA 2015-12-01/02 8K19A 2S 5C
>>
>> start Eb/N0 BER rank
>>
>> 19:00 1.0 35.2% 684
>> 20:00 3.4 30.7% 0
>> 20:30 13.0 6.5% 0
>> 21:00 10.4 12.9% 0
>> 21:30 11.4 10.4% 0
>> 22:00 9.2 16.2% 0
>> 22:30 11.7 9.6% 0
>> 23:00 14.0 4.3% 0
>> 23:30 12.6 7.2% 0
>> 00:00 6.5 23.6% 0
>> 00:30 10.5 12.7% 0
>> 01:00 0.2 36.3% 6893
>> 01:30 8.3 18.8% 0
>> 02:00 4.5 28.3% 0
>> 02:30 -1.0 38.1% 47236
>> 05:00 4.2 29.1% 0
>> 05:30 11.0 11.3% 0
>> 06:00 4.5 28.3% 0
>> 07:00 7.2 21.7% 0
>> 08:00 7.2 21.7% 0
>> 08:30 6.3 24.0% 0
>> 09:00 0.2 36.3% 84968
>>
>> --
>> Paul Nicholson
>> --
>>
>>
>
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