[aprssig] APRS DF reporting

Bob Bruninga bruninga at usna.edu
Tue Nov 21 22:27:08 CST 2006

>> BUT TO SOMEONE ON any map scale larger than about 
>> the 8 mile range scale, my infinately long bearing 
>> lines looked like random OUTWARD bound bearing
>> lines in all directions of the compass!
> This seems like a non-issue to me.  If there's 
> more than one report, anyone with any sense at 
> all will look at the intersection and not  
> the ends of the lines.

Then I dont think you have seen what I am talking about.  There is no intersection at large maps scales.  All the bearing lines appear to be radiating outward.  As you say, "anyone with any sense" may see that as "typical garbage" from yet another person playing with their new doppler DF box and so will ignore the junk when maybe it is something he should look at.

We dont want someone on a fox hunt in California with bearing lines crossing the USA into New York just because someone is looking at a map of the USA.  

I disagree, it is a very improtant issue.  Bearing lines have an estimated length relative to the knowledge of the person doing the bearing line.  That information must be included in the DF report.  Else it is just more well intentioned, but useless missinformation regurgitated onto APRS...

de Wb4APR 

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