[OZAPRS] Higher beacon rate HF versus VHF?

[David and Justine Olsen]

Richard

I should qualify that with- under current solar minimum conditions

David

On 30 Mar 2009, at 20:36, David and Justine Olsen wrote:

> Hi Richard
>
> My email answer may have seemed a bit short, that wasn't my intention.
>
> I was just thinking that for HF APRS where the maximum range must  
> surely be limited compared to voice, that a worldwide standard on  
> beacon rates that seems like a good idea in heavily populated areas  
> may not be such a good idea in VK.
>
> I was just contributing to the discussion that not only arrives at  
> such agreements, but also varies them in the same way as the Wide  
> n.n  change came about.
>
>
> David
> VK4MDX
>
>
> On 30 Mar 2009, at 20:00, Richard Hoskin wrote:
>
>>
>> Hi Dave,
>>
>> I'm not really asking for agreement.
>>
>> I was pointing out the recommended mobile HF beacon rate world  
>> standard that
>> has been in place for over 15 years, and the reasons why.
>>
>> We have a very good VHF APRS Network in Australia that is based on  
>> standards
>> and cooperation.
>>
>> Cheers
>> Richard
>> VK3JFK
>>
>>> -----Original Message-----
>>> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs- 
>>> bounces at aprs.net.au] On
>>> Behalf Of David and Justine Olsen
>>> Sent: Monday, 30 March 2009 8:12 PM
>>> To: Australian APRS Users
>>> Subject: Re: [OZAPRS] Higher beacon rate HF versus VHF?
>>>
>>> Richard,
>>>
>>> I am not sure I agree <snip snip>
>>>
>>>> this results in a maximum of 7 stations being able to transmit per
>>>> minute.
>>>
>>>
>>> You sure? They can transmit all they like. Given the poor Rx success
>>> rate, they aren't going to cause a whole lot of problems if they
>>> aren't heard by anyone.
>>>
>>>> Lets see, HF APRS increases the coverage area from roughly 200,000
>>>> Sq Km
>>>> using 3 hops to potentially 75 Million SQ KM.
>>>
>>>
>>>
>>> Australia is different to elsewhere most that space has nobody in  
>>> it.
>>>
>>>
>>>> the maximum number of
>>>> stations that can be in a single APRS Gate's coverage area is 70
>>>> stations.
>>>
>>> I wonder how many times you have seen 70 HF stations on APRS at  
>>> once,
>>> let alone in one iGate's coverage area.
>>>
>>>
>>> David
>>> VK4MDX
>>> _______________________________________________
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>>> Ozaprs at aprs.net.au
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>>
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