[aprssig] some questions about APRS queries
Michael Conrad
do5mc at friggleware.de
Sun Oct 5 06:50:20 EDT 2008
Hi all,
I'am implementing a query module for my APRS software, but have some trouble with
the ?APRSD and ?APRSH queries (page 79 of APRS Spec 1.0.1).
APRSD:
1. How long after the last beacon a station should be reported as heard direct ?
(Using net cycle time of 10 minutes could be to short.)
2. What happen, if more stations were heard direct, than fitting into one response ?
(In average about 30 stations would fit into one response message.)
APRSH:
3. Is one hour counted from 00 to 59 OR 60 minutes back from the time the query was received
by the station ?
(The first one is much easier to implement (but requires a absolute clock), the last one is more exact.)
Reading the spec, I assume the first one is right ("in each of the last 8 hours").
Thanks in advance
Michael, DO5MC
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