[OZAPRS] Higher beacon rate HF versus VHF?

[David and Justine Olsen]

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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>
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