[OZAPRS] Higher beacon rate HF versus VHF?

Ray Wells vk2tv at exemail.com.au
Mon Mar 30 21:09:05 EST 2009


I think the HF network also has a proven record, again, based on agreed 
standards.

Ray vk2tv

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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>   

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