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FW: [aprssig] APRS Field Day on 145.01

Robert Bruninga bruninga at usna.edu
Sun Jun 19 15:40:20 UTC 2005


>What MORON wants to do full APRS on 145.010 ?

Its not "full APRS", its human operators using a digital
channel to make a quick contact.  I proposed it.  Since 
the ARRL rules prohibit the use of existing infrastructure 
during Field Day for packet operation.  Choosing 145.01 
seemed to make sense as a place to make packet 
contacts.

1) Its the national digital channel
2) Its only a 1 day event
3) The total load might be  2 or 3 stations in range
    of any given BBS
4) The duty cycle of APRS in this context is less than
    say 5% of channel capacity and would not interfere
    in any noticible way with BBS forwarding
5) During a forwarding connection, no APRS operator
    is going to try to send any packets (self defeating)
6) The BBS activity is very low and probably
    minimal on Field Day when eveyone should be out
    in the field doing HAM radio.

7) Getting the FD messages via established BBS is
   not valid for points on FD either, because packets 
   must use a non established infrastrucutre to count.
   So there should not be an unusual rise in BBS 
   forwarding that day either...

I think that one packet per 10 minutes (0.02 of
channel capacity) per FD station packet would
be quite unnoticed on any typical BBS channel.

Remember, we are not talking about moving what
you hear on 144.39 over to 145.01.    That contains
95% stuff that you would never hear on FD on
a different channel.  The only thing that would 
move to 145.01 would be human operators and that
is typicaly less than 5% of what you hear.  And
even then my guess is few will go to the trouble.

So I dont think it will be a problem for BBS operators
on that day...

de Wb4APR, Bob


Herb Gerhardt <hgerhardt at wavecable.com> wrote:
145.01 is not my idea but Father Bob's. I still prefer doing it all on
144.390 but I did not want to waist my time fighting it like I did last
year. So, Jerry, if you want us to go for that 100 points, I will let you
figure out the rules. I hate stupid rules and I am sure these are stupid.

I think I told Scott about it the first time Bob opened his mouth about it a
couple of months ago.

Herb

-----Original Message-----
From: aprssig-bounces at lists.tapr.org 
[mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Robert Bruninga
Sent: Saturday, June 18, 2005 6:54 AM
To: aprssig at lists.tapr.org 
Subject: [aprssig] APRS Field Day on 145.01


Field Day is the epiphany of APRS.
Under field conditions, creating an AD-HOC digital
network for sharring commuications with all around
you is-was-and always has been the main objective
of APRS.

I have only fielded one or two questions about how
to set up APRS for this FD on 145.01, and this either
means that everyone is fully ready to go and under
stands the challenges or very few are actually going
to make the effort. See:

http://www.ew.usna.edu/~bruninga/aprs/fd2005.html 

I suggest that the easy way to see what is going to
happen is for everyone NOW till FD to place objects
on their maps representing their intended FD ops
AND frequency. Remember it must be on a different
freq and use different assets from 144.39 to count
under the ARRL FD rules. I suggest the national
digital channel of 145.01 for that day.

1) Everyone use the TENT/CAMP/PORTABLE symbol
to make them easy to search by symbol

2) Indicate 145.01 text to show you will actually do APRS
(I see several FD obj, but no idea if they will be APRS)

3) Everyone with a D700 or Home station with KPC-3
or Software that can digipeat UITRACE, set to support
"TEMPn-N" by setting their UITRACE to TEMP,28
(D700 uses just UITRACE TEMP.)

4) On FD, everyone QSY to 145.01 and set up TEMPn-N
stations and digis, the more the better!

NOTICE that you can put UITRACE TEMP into ALL
your systems NOW including your mobile AND leave it
their PERMANENTLY even while you are on 144.39
because it will not hurt anything. THink of it as a sleeping
capability that can be used at any time for testing but
can be instantly QSY'ed on FD.

This dependence on TEMPn-N as the universal APRS
ad-hoc path does have a disadvantage in that only
TNC's that can support it can be used as digis. Thus,
you have to plan ahead on what to make your portable
stations from. But UIVIEW operating with a KISS
TNC can support UITRACE TEMP too, so would someone
please publish exactly the minimum steps needed to
make UIview act as a TEMPn-N digi?

Now till then, see my home station Posit text saying:
"Will be FD on 145.01 TEMPn-N digi"

Which shows up nicely on the Kenwood as:

WB4APR:
Will be FD
on 145.01
TEMPn-N

See ya on FD! Where everyone is a digi!

de Wb4APR, Bob

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