[OZAPRS] APRS.fi

[Gary Stern]

Woops,

I might add that only occurs with a few station, and I cannot see a 
pattern in it. EG: oct/2014 I haven't seen it, but sept I did several times.


On 14-Oct-14 21:51, Owen Duffy wrote:
> Hi,
>
> On 14/10/2014 21:37, Gary Stern wrote:
>> The problem.
>>
>> Quite often I will see that I have gated a station and not have it
>> appear in my "directly heard list", yet I will appear in their list.
> Are you saying you KNOW you heard it directly, but aprs.fi doesn't show
> it as heard direct?
>
> If you receive a packet directly originally sent with say WIDE2-1 and
> gate it, aprs.fi (incorrectly) assumes it was originated with WIDE2-2
> and therefore you did not hear it direct. Perhaps the cases you mention
> are in this category.
>
> The whole WIDE / TRACE / RELAY thing is not uniformly implemented, and
> there isn't a guaranteed reliable method of determining number of hops a
> packet has had in general. The AX.25 protocol should have included a
> mandatory hop count in the header, but it didn't and probably never will
> because it is mostly carried by outdated infrastructure that cannot
> /will not be upgraded.
>
> I do not use WIDE2-1 during trials where I want to use the aprs.fi reports.
>
> Owen
>>
>> Another interesting aspect, is that after the end of month roll over
>> the numbers will match.
>>
>> Any ideas ?
>>
>>
>> Gary
>> VK2LV-1
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