Red Dot - Defined!

Lynn Deffenbaugh

I was in an APRS QSO with M6XSD-1 this morning and was asked what the "red dot" is that "appears sometimes". That was such a good question that I figured I'd answer it here.

Short Answer: The red dot is a visual indicator of the Genius Beaconing's Forecast Error.

Genius Beaconing's Forecast Error works by calculating where an outside observer would think you are based on your last beaconed speed and heading. It takes that last information and extends it by the time it has been since your last beacon to arrive at an expected lat/lon. This is compared to your actual lat/lon (which, of course, only you know at this point) to derive an error vector (distance and direction). The red dot is plotted inside the circle in that direction and scaled such that the circle is the configured Genius Forecast Error distance.

When the red dot hits the circle, the configured Forecast Error distance has been reached and a new beacon is sent (provided that at least the Min Time has been reached).

So, if you're driving along in a straight line at a steady speed, you won't see the red dot. (It's actually bouncing around a bit underneath your icon in the center of the circle).

If you slow down, that outside observer will still think you're driving fast and will have you further ahead of where you are and the red dot will start moving towards the top of the screen. If you then resume your original speed, the red dot will freeze at that distance ahead. If you go faster than your last beaconed speed the red dot will drift back to the center and will then start falling towards the bottom of the screen as your actual location gets ahead of where the elapsed-time forecast would place you.

Slight heading changes are even more fun. If you turn to the left (by less than the configured Heading Change or that will trigger a new beacon), the red dot will begin drifting to the right. Veer right and it will drift to the left. Resume straight line motion in the new heading and the dot will continue to drift as your actual location continues to get further away from the course indicated by the previously beaconed speed and heading.

Now, if I could only find a free Wiki to start putting all of these short notes into, we'd end up with a documentation set to which new users could be pointed! Anyone know of one?

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

Re: Keeping Map Centered on Me?

Lynn Deffenbaugh

Lynn W. Deffenbaugh wrote:
Jason Tuggle, K2ENG wrote:

As a side note, the check-mark is now always on and cannot be turned off for
some reason. In older versions, this is how I centered on my own station.
Actually, I disabled that on purpose. I can't tell you how many times I popped up the menu on the station that was being tracked and accidentally unchecked the Center and WHAM, I was back at the middle. So, it no longer toggles off. That's why I moved it to double-clicking
But wait, I just re-tested it and I can still uncheck the Center and it puts me back to the middle. This is both on Win32 and Windows Mobile and works regardless of whether or not I've panned off of the centered station. Go figure! They say the memory is the first thing to go so.....What was I talking about again?

Lynn (D) - KJ4ERJ

Re: Keeping Map Centered on Me?

Lynn Deffenbaugh

Jason Tuggle, K2ENG wrote:

As a side note, the check-mark is now always on and cannot be turned off for
some reason. In older versions, this is how I centered on my own station.
Actually, I disabled that on purpose. I can't tell you how many times I popped up the menu on the station that was being tracked and accidentally unchecked the Center and WHAM, I was back at the middle. So, it no longer toggles off. That's why I moved it to double-clicking the heading box. It'll make more sense when I figure out an icon to put on the screen indicating that you've dragged the map, or are tracking someone else, or are tracking yourself.

More to come and a new release coming within the next day or two.

Lynn (D) - KJ4ERJ

Re: Keeping Map Centered on Me?

>If you double-click on the Heading box (beside or below the large speed
>box), it will first re-center the map on some other station that you
>were tracking. The next time you double-click it, it will return the
>center to you.

This suggestion fixed it.  It is now tracking me/centering on station.

>Alternatively, if you click on your own station ("Me"),
>it should have a check-mark and the Center option checked. If not,
>check it and the map should stay centered on your station again.

I tried this way first and it didn’t work.  That’s what prompted the first message.
As a side note, the check-mark is now always “on” and cannot be turned off for
some reason.  In older versions, this is how I centered on my own station.

>If this doesn't get the tracking restored, let me know and I'll see what
>else I can figure out.
>
Lynn (D) - KJ4ERJ

All good, now! Thanks!

Jason, K2ENG

Re: TT\$

Robin Williams <phonetech@...>

Hi Lynn,
The tt4 is connected up to a Tait T500 comercial radio.
Works well. 25 watts
Cheers,
Robin.

-----Original Message-----
From: aprsisce@yahoogroups.com [mailto:aprsisce@yahoogroups.com] On Behalf
Of Lynn W. Deffenbaugh
Sent: Friday, 12 February 2010 3:35 p.m.
To: aprsisce@yahoogroups.com
Subject: Re: [aprsisce] TT\$

Robin Williams wrote:
I have connected up to my TT4 and all is receiving fine.
Managed to shift all my tiles over to the laptop and seems fine.
Messaging working well ZL3REW-8.
Thanks Lynn,
You're welcome. Glad to know it's all working. What's the TT4 connected to

Lynn (D) - KJ4ERJ

------------------------------------

Re: messages

Lynn Deffenbaugh

Robin Williams wrote:
On RF.
just tried sending message to and from aprsis.Worked fine.
As I live in an area where I hear a lot of digi's etc I recieved 5 ACK'S back.
(unexpected redundant ack from zl3rew-1.)
Is there a way to block out duplicate ack's.
Right now, no. But I'll see if I can move them into the .LOG file in the next release. I'm loath to make them completely disappear just yet. I agree with you though, they get old in the presence of multiple radio paths.

Lynn (D) - KJ4ERJ

Re: TT\$

Lynn Deffenbaugh

Robin Williams wrote:
I have connected up to my TT4 and all is receiving fine.
Managed to shift all my tiles over to the laptop and seems fine.
Messaging working well ZL3REW-8.
Thanks Lynn,
You're welcome. Glad to know it's all working. What's the TT4 connected to radio-wise?

Lynn (D) - KJ4ERJ

messages

Robin Williams <phonetech@...>

Hi Lynn,
On RF.
just tried sending message to and from aprsis.Worked fine.
As I live in an area where I hear a lot of digi's etc I recieved 5 ACK'S back.
(unexpected redundant ack from zl3rew-1.)
Is there a way to block out duplicate ack's.
Cheers,
Robin.

TT\$

Robin Williams <phonetech@...>

Hi Lynn and all,
I have connected up to my TT4 and all is receiving fine.
Managed to shift all my tiles over to the laptop and seems fine.
Messaging working well ZL3REW-8.
Thanks Lynn,
Robin ZL3REW

Re: APRSIS32 Tracking

Jerome Lofton <LoftonJ@...>

Lynn,

Just tried the "buddy" filter feature ... works great for filtering down to
just the desired SSID(s).

I added your SSID b/KJ4ERJ* and expanded the display map to all the
southeast US see my station in Atlanta and yours in Palm Bay.

Two Questions:

(1) Is there a limit to the number of SSIDs that can be added in the filter
field?

(2) As a future feature, would it be possible to add the ability to create
User Definable Filters that would automatically add to the "VIEW"
drop-down menu (or if not add perhaps fixed User1, User2, User3, to the

Thanks,

Jerome
WD4CWG

From: "Lynn W. Deffenbaugh" <kj4erj@arrl.net>

To: aprsisce@yahoogroups.com

Date: 02/11/2010 09:04 AM

Subject: Re: [aprsisce] APRSIS32 Tracking

Sent by: aprsisce@yahoogroups.com

Jerome Lofton wrote:

I Just used the "Click --> Center" Tracking" functionality today for
the first time ... great feature to be able to lock onto a specific SSID.
Actually, on APRSIS32, you can just right click on a station and it
start tracking center on him. Either way, the client also adds a Friend
Range filter when you're tracking someone using the normally configured
range. That way if s/he/it travels beyond your normal circle, you'll
still get the updates as well as stations around them.

where CALL is the prefix of the call you want to track or the entire
callsign without the *), the client will reverse-video those stations in
the scrolling station window.

For instance, here's the filter I run on KJ4ERJ-AP:

b/KJ4DXK* b/KJ4ERJ* b/KJ4OVQ* u/APWW*/APWM* b/W4SGC* b/AF3K

I was tracking a friends progress on his flight in his airplane.
That AF3K in my buddy filter is a cool boat that I was tracking as it
went down the Intercoastal Waterway on the Atlantic side of Florida.
Really a cool boat. We had dinner with the owners when they were here
after I tracked them down the coast from Jacksonville. See their boat
at: http://lnvt.wikidot.com/hull-63

Is there a way to save the tracking log so that I can forward it to
him as reference for his speed & path ?
Unfortunately no. But that's a really good idea! The program actually
buffers tracks for ALL stations which is why you see the lines all the
time and get dots for the recent positions of the centered station.
Maybe just a new popup menu option to "Save Track" that's only there if
there's a sufficiently interesting number of points. I'll add that to
the list right after I learn how to write out GPX files of your own
track! It'd be a simple extension of that one.

Lynn (D) - KJ4ERJ

PS. Sneak peek for those that read this far. I'm planning to support
"track in separate window" in some future release of the Win32 client.
The additional window would be only a map and scale bar, but will
otherwise behave like the main window. Then you can keep one window
zoomed out for the local APRS picture while putting up a "picture in
picture" (if you position the windows correctly) of the details of one
or more interesting stations.

Thanks,
Jerome
WD4CWG

Newbie on the lose

Stan Coleman - N0YXV

Just downloaded APRSISCE Monday for the first time. Installed just fine (or sort of) on my HTC SNAP. So far I've only noticed a couple of things.

1.) If I leave the GPS on and walk into a building were I can not get GPS my phone gets warm and eats batteries like popcorn.

2.) I don't have a touch screen so any 'double click' or 'right click' doesn't work. Made for an interesting time setting up the software as I couldn't get to all the options.

3.) I can't change my icon. I like the phone icon that shows up but I'd rather show the guy walking icon.

Re: Keeping Map Centered on Me?

Lynn Deffenbaugh

Jason Tuggle, K2ENG wrote:
I am running the first recent update. Now for some reason (even though the "center" is checked) it will no longer keep my station centered on the map. I have to keep clicking on my station and selecting center.
If you double-click on the Heading box (beside or below the large speed box), it will first re-center the map on some other station that you were tracking. The next time you double-click it, it will return the center to you. Alternatively, if you click on your own station ("Me"), it should have a check-mark and the Center option checked. If not, check it and the map should stay centered on your station again.

Anyone else having that issue? Perhaps it's something I'm not doing correctly?
I'm trying to figure out some visual cue what mode the client is in. It might be a) statically centered because of a drag, b) statically centered at your "Preferred" view, c) Tracking center on some arbitrary station, or d) Tracking center on itself. If there's an artist out there that can come up with some small visual icon that shows these four states (or the first 3 and the lack of the icon is the fourth), I'd be interested in their ideas. I'm thinking to add such an icon somewhere at the edge of the map which will toggle through the various states when double-clicked until it gets back to state d.

If this doesn't get the tracking restored, let me know and I'll see what else I can figure out.

Lynn (D) - KJ4ERJ

Jason, K2ENG

Keeping Map Centered on Me?

Lynn,

I am running the first recent update. Now for some reason (even though the "center" is checked) it will no longer keep my station centered on the map. I have to keep clicking on my station and selecting center.

Anyone else having that issue? Perhaps it's something I'm not doing correctly?

Jason, K2ENG

Sent from my Windows Mobile® device.

Re: Max distance

Lynn Deffenbaugh

It won't be a port of this one, but a friend of mine, KJ4HPQ, is working on a native BlackBerry client. He's not happy about what it does to his battery, but as those of us on Windows Mobile know, that's the price you pay for keeping a live data connection and hot GPS running. That's why we all have car chargers!

Lynn (D) - KJ4ERJ

b a wrote:

any chance porting this application into a blackberry application.

On Thu, Feb 11, 2010 at 8:07 AM, Lynn W. Deffenbaugh <kj4erj@arrl.net <mailto:kj4erj@arrl.net>> wrote:

b a wrote:
> excellent software using a pda bluetoothed to my d700 inthec ar

Thanks. What callsign-SSID is the APRSISCE/32 station? Or is it
receive-only from the d700 which I assume is using KISS mode on the
internal TNC?

Lynn (D) - KJ4ERJ

Re: Max distance

b a <kc9gqr@...>

any chance porting  this application into a blackberry application.

On Thu, Feb 11, 2010 at 8:07 AM, Lynn W. Deffenbaugh wrote:

b a wrote:
> excellent software using a pda bluetoothed to my d700 inthec ar

Thanks. What callsign-SSID is the APRSISCE/32 station? Or is it
receive-only from the d700 which I assume is using KISS mode on the
internal TNC?

Lynn (D) - KJ4ERJ

Re: APRSIS32 Tracking

Jerome Lofton <LoftonJ@...>

Lynn,

Great ... I look forward also to the next updates.

Best regards,

Jerome
WD4CWG

From: "Lynn W. Deffenbaugh" <kj4erj@arrl.net>

To: aprsisce@yahoogroups.com

Date: 02/11/2010 09:04 AM

Subject: Re: [aprsisce] APRSIS32 Tracking

Sent by: aprsisce@yahoogroups.com

Jerome Lofton wrote:

I Just used the "Click --> Center" Tracking" functionality today for
the first time ... great feature to be able to lock onto a specific SSID.
Actually, on APRSIS32, you can just right click on a station and it
start tracking center on him. Either way, the client also adds a Friend
Range filter when you're tracking someone using the normally configured
range. That way if s/he/it travels beyond your normal circle, you'll
still get the updates as well as stations around them.

where CALL is the prefix of the call you want to track or the entire
callsign without the *), the client will reverse-video those stations in
the scrolling station window.

For instance, here's the filter I run on KJ4ERJ-AP:

b/KJ4DXK* b/KJ4ERJ* b/KJ4OVQ* u/APWW*/APWM* b/W4SGC* b/AF3K

I was tracking a friends progress on his flight in his airplane.
That AF3K in my buddy filter is a cool boat that I was tracking as it
went down the Intercoastal Waterway on the Atlantic side of Florida.
Really a cool boat. We had dinner with the owners when they were here
after I tracked them down the coast from Jacksonville. See their boat
at: http://lnvt.wikidot.com/hull-63

Is there a way to save the tracking log so that I can forward it to
him as reference for his speed & path ?
Unfortunately no. But that's a really good idea! The program actually
buffers tracks for ALL stations which is why you see the lines all the
time and get dots for the recent positions of the centered station.
Maybe just a new popup menu option to "Save Track" that's only there if
there's a sufficiently interesting number of points. I'll add that to
the list right after I learn how to write out GPX files of your own
track! It'd be a simple extension of that one.

Lynn (D) - KJ4ERJ

PS. Sneak peek for those that read this far. I'm planning to support
"track in separate window" in some future release of the Win32 client.
The additional window would be only a map and scale bar, but will
otherwise behave like the main window. Then you can keep one window
zoomed out for the local APRS picture while putting up a "picture in
picture" (if you position the windows correctly) of the details of one
or more interesting stations.

Thanks,
Jerome
WD4CWG

Fixed Stations w/GPS Settings

Lynn Deffenbaugh

Greetings, especially to those using a GPS on a fixed station,

I've learned in my testing that Genius Beaconing, in the default configuration, isn't really a good idea for a fixed station with a GPS that drifts around quite a bit. It can generate LOTS of position updates as the heading swings back and forth and/or the forecast position's error gets large.

I've found that if I simply set the Min Time in the Genius Beacon Settings dialog to something like 300 (5), 600 (10), or 900 (15) seconds (minutes), it really dampens down the position beacons.

Of course, if you'll be taking your station mobile, you'll want to go back and set that min time back to something more responsive like the default of 15 seconds or possibly more.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

PS. For my mobile installation (KJ4ERJ-12), I just toggle the phone off when I go indoors and toggle the GPS off, but keep the phone on, when I get home and re-tether it to my laptop.

Re: Max distance

Lynn Deffenbaugh

b a wrote:
excellent software using a pda bluetoothed to my d700 inthec ar
Thanks. What callsign-SSID is the APRSISCE/32 station? Or is it
receive-only from the d700 which I assume is using KISS mode on the
internal TNC?

Lynn (D) - KJ4ERJ

Re: APRSIS32 Tracking

Lynn Deffenbaugh

Jerome Lofton wrote:

I Just used the "Click --> Center" Tracking" functionality today for the first time ... great feature to be able to lock onto a specific SSID.
Actually, on APRSIS32, you can just right click on a station and it start tracking center on him. Either way, the client also adds a Friend Range filter when you're tracking someone using the normally configured range. That way if s/he/it travels beyond your normal circle, you'll still get the updates as well as stations around them.

If you add b/CALL* filters to your Add Filter string (space delimited where CALL is the prefix of the call you want to track or the entire callsign without the *), the client will reverse-video those stations in the scrolling station window.

For instance, here's the filter I run on KJ4ERJ-AP:

b/KJ4DXK* b/KJ4ERJ* b/KJ4OVQ* u/APWW*/APWM* b/W4SGC* b/AF3K

I was tracking a friends progress on his flight in his airplane.
That AF3K in my buddy filter is a cool boat that I was tracking as it went down the Intercoastal Waterway on the Atlantic side of Florida. Really a cool boat. We had dinner with the owners when they were here after I tracked them down the coast from Jacksonville. See their boat at: http://lnvt.wikidot.com/hull-63

Is there a way to save the tracking log so that I can forward it to him as reference for his speed & path ?
Unfortunately no. But that's a really good idea! The program actually buffers tracks for ALL stations which is why you see the lines all the time and get dots for the recent positions of the centered station. Maybe just a new popup menu option to "Save Track" that's only there if there's a sufficiently interesting number of points. I'll add that to the list right after I learn how to write out GPX files of your own track! It'd be a simple extension of that one.

Lynn (D) - KJ4ERJ

PS. Sneak peek for those that read this far. I'm planning to support "track in separate window" in some future release of the Win32 client. The additional window would be only a map and scale bar, but will otherwise behave like the main window. Then you can keep one window zoomed out for the local APRS picture while putting up a "picture in picture" (if you position the windows correctly) of the details of one or more interesting stations.

Thanks,
Jerome
WD4CWG

Re: Max distance

b a <kc9gqr@...>

excellent software using a pda bluetoothed to my d700 inthec ar

On 2/11/10, Lynn W. Deffenbaugh <kj4erj@arrl.net> wrote:
Robin Williams wrote:
I notice that the max distance is 9999. i suspect that this is 999 miles.
Can this be expanded to cover the whole world.
Robin ZL3REW
If you mean on the Configuration Range number, just click in (or tab to)
the field and type whatever you want. I just didn't want the spin
button to go on and on and on and on like the EverReady Bunny,.

BTW, Note to all: Some configuration options require you to close and
restart the client to have full effect (like changing your callsign or
password). Others require at least a toggle of their respective enable
off and back on (like port changes on NMEA, KISS, or AGW). Others have
immediate effect (like the range number and Genius beaconing parameters).

I really need to work on some documentation, but adding new features and
tweaking performance is much more fun (and rewarding!).

Lynn (D) - KJ4ERJ

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