Tag Archives: aprs

HuntsvilleHamfest2010

HH logo

"The" Hamfest

As expected, this year the Huntsville Hamfest is a blast. Last year a schedule conflict resulted in the hamfest having to split the vendors and the flea-market into two areas. This year they are back together where it has been before, and everyone is much happier. It appears to be a big crowd this year, and everyone says they are having a wonderful time. I won’t go into too much detail this morning, as I need to Continue reading

WB8ELK flying this weekend

Bill Brown – WB8ELK has announced this weekend’s Amateur Radio High Altitude Balloon (ARHAB) activities.

Balloon 1

Launch around 9:15 am Saturday March 27th
for the Space Hardware Club’s balloon
from near UAH Huntsville, AL at the NSSTC building.
34.73N 86.64W

APRS on 144.39: KJ4NKE-11
APRS on 144.34: KJ4NKE-12

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Balloon 2

Around 10 am, the second balloon will lift
with a Science Fair camera project:

APRS on 144.39: WB8ELK-11

DominoEX22 on 144.36 MHz FM: WB8ELK (top of each minute)
300 baud ASCII RTTY (200 hz shift) follows the DominoEX
(decode with FL-digi under “custom RTTY”
300 baud, 200 hz shift, 8N1)

Every 5 minutes the ASCII will be followed by either a CW message
or Hellscreiber mode (on the carrier freq – SSB mode).

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Predicted landing zone is near Cleveland, TN

Details from some of Bill’s previous adventures, on his website http://home.hiwaay.net/~bbrown/

WB8ELK screen shot

WB8ELK home page screen shot

More comments and links to follow…
/;^)

N4OFA :: New Blog

Mike has a new blog. OK, so I’ve helped him get it started – I’m sure he will be adding more stuff as it becomes more familiar to him. I kicked it off with a post detailing a soundcard interface that I built into an Altoids tin box. This is a simple to make, easy to use gadget to connect your radios with your computers for digital messaging… You have heard of APRS ? Winlink ? PSK-31 ? There is a lot more – and this little thingy can get you going quickly.

new blog : N4OFA

N4OFA's new blog - click here


Go check it out, and save a bookmark (or a Favorite if you use IE)…
Mike will surely have some good stuff here.
73 for now /;^)

APRS tactical objects

With the recent winter weather we had some road closures. (This is old news from January, but I’m trying to clean out the draft folder)… While the 2m voice net was active helping collect and relay traffic reports on road conditions, I was trying to think of a way to use APRS to indicate where the roads were closed. Using UI-View I was able to create an object in one location, and thought I’d just move it around now and then – to sort of cover the extend of the closure (the elevated portions of I-565 and Memorial Parkway around central Huntsville). When using the http://aprs.fi web site to monitor APRS activity, the default view is to show recent tracks within the last hour – so my repositioning of the object had an interesting effect. Check this display . . . .

APRS map with object

Strange object obstructing traffic ?


An interesting side-effect tho, for those watching on a mobile display, or anyone who clicked the object for the details, saw the relative speed as determined by differencing the previous position – which sometimes showed over a hundred mph…

Anyway, the object of this posting is to show the idea/concept and open the question – ‘Is there a better way ?‘ If you have an event that is not isolated to one specific coordinate, what is a good way to represent that on the APRS system. It is not quite like a severe weather watch box, but perhaps a narrow box could be created that indicates the area of road closure… The next day as the roads were still closed – I noticed that John – K4JCH had created some objects, each with a number, that indicated the extent of the closures. In other words, one at each end of the closure, or each on-ramp… Have you tried anything like this ?

Any one else have any good ideas ?
Thanks /;^)