You're welcome!
--
Cheers and 73 - Jon N7UV

As for the age times, those are the times since an ADS-B sentence was last successfully heard for a given aircraft. Note that keyword "successfully"; if there is a bit error in a received sentence causing a checksum failure, the sentence will be discarded and not counted as received. Distant aircraft will probably have higher error rates, causing slower updates.

The View>Aircraft list/table shows many dozens of a/c updating at intervals of 0-1 second. I'm fairly sure that it's not due to dropped or discarded packets. My point was about the somewhat random intervals between screen refreshes, sometimes a few seconds and other times over 30 seconds. I don't know what causes that randomization. As I said, it doesn't appear to be processor issues, as the list updates seemingly at 1 second intervals. Maybe it's the map refresh that gets bogged down? The refresh certainly takes a good fraction of a second, at least for this pc, so maybe there's just so many calls to rewrite the screen that something can't respond that quickly? The dashboard pseudo-LED for ADS-B RF is always green with short flashes of black. The ADS-B receiver is an RPi 4 so it can feed data pretty rapidly. Using a browser interface, I'm getting 400-600 decoded messages per second.

Anyway, I'll be out in the middle of nowhere over the weekend and will see how the refresh behaves in a less intense receiving environment.

Cheers and 73 - Jon N7UV

Thank you for pointing this out. I used to allow people to download the plugin distributions manually from the website by hyperlinks here, but I noticed in my web server logs that the vast majority of such downloaders were web spiders, and not the "good" ones like Google or DuckDuckGo, but the evil ones looking for free data or code to profit on. Plus I was handling too many trouble tickets from people who couldn't figure out how to manually install the plugins. It became easier to eliminate the hyperlinks and have people install the plugins automatically through the Help->Install Plugins menu choice in YAAC.

I will fix the web page to eliminate this confusion.

Andrew, KA2DDO
author of YAAC

________________________________________
From: yaac-users@groups.io <yaac-users@groups.io> on behalf of Jon Adams <n7uv.jon@...>
Sent: Wednesday, May 22, 2024 5:19 PM
To: yaac-users@groups.io
Subject: [yaac-users] KA2DDO website links missing?

I actually noticed this some time back, but forgot to ask about it.
[cid:attach_0_17D1EC57078E2ED0_15797@groups.io]
The instructions highlighted in yellow suggest that there are links for each of the plugin names. However, at least on my Chrome and Firefox browsers, there's no link. I had to go to sourceforge and find the adsbplugin.jar independently of this page's instruction.

Thanks again for creating and maintaining such a nice program.
--
Cheers and 73 - Jon N7UV

Duh. The easiest thing was the most obvious. I went to View>Layers>Show Dead Reckoning and turned it off. My bad.
--
Cheers and 73 - Jon N7UV

I actually noticed this some time back, but forgot to ask about it.

The instructions highlighted in yellow suggest that there are links for each of the plugin names. However, at least on my Chrome and Firefox browsers, there's no link. I had to go to sourceforge and find the adsbplugin.jar independently of this page's instruction.

Thanks again for creating and maintaining such a nice program.
--
Cheers and 73 - Jon N7UV

Hi Andrew -

Thanks for the info. I went to port setup and dialed it down to 1 min, and that seemed to help.



My mobile ADS-B setup is fairly sensitive. I don't worry about random a/c at extreme range, more that stuff in the area is reliably received.

The snail-trail/skidmark/dead reckoning is really messing things up. I live near many airports with significant traffic, and can hear hundreds of a/c within a 20 nm range. The problem seems to be that when a/c destinate at a particular airport, dead reckoning assumes they're still moving at some runway taxi speed (except for Sky Harbor KPHX, an ADSB-X field, where they are required to keep ADS-B on until they arrive at the stand). Though even that doesn't explain the long trails coming off the west end of the dual runways (they're landing/taking off to the west currently).?

I just changed the behavior to

and dialed down the maximum age to view to 30 min and time to keep to 1 hour.

Let's see what that does for me.

--
Cheers and 73 - Jon N7UV

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Thanks for the update, Andrew, especially for the attention to ADS-B.

In searching through the new version, I haven't located the part about?

"11. in the ADS-B plugin, set the inactive station time interval separately
for aircraft, with a default inactive-before-purge time of 5 minutes
and a maximum of 60 minutes."

Where is that located? I went to View>Aircraft>Filter but it appears to be the standard filter settings for all stations, which I have set to 1 hour.?

This is in the truck, running a Win 11 box. The truck is parked. I have a/c that are now well over an hour old and (what i think is dead reckoning?) still showing as giant skidmarks %^)



Another thing I notice is that updating the screen seems to be at random times (the following is seconds after the top of the minute): 50 55 02 35 58 08 15 20 52 55 17 35 44 56 07 20 28 38 47?
Since there are sometimes as little as 3 seconds (52 to 55) and other times as much as 33 seconds (02 to 35) between screen updates, it doesn't seem to be a matter of processor overloading.?
--
Cheers and 73 - Jon N7UV

next beta build#198 of YAAC ("Yet Another APRS Client"), created 2024-May-21

downloadable from
or

changes and updates include:
1. assorted changes to improve performance and reduce JVM heap fragmentation
and garbage collection overhead by reducing the number of transient
objects created.
2. update Javadocs to indicate in which Provider API version number new
functionality was added.
3. ensure that packets originated by the local station are not digipeated
or Tx I-gated by the originating station.
4. update the ?YDBG query handler to add an option for listing the plugins
in use by the queried station.
5. clean up port beacon name selector so duplicate beacon types don't get
registered to a port.
6. fix the Heard Station table view to optionally use the current filter
settings to calculate the table contents.
7. fix the line-of-sight window to use smaller units for lines of sight
over a short distance.
8. when saving and loading polyline definitions in the Draw layer, actually
honor the control that identifies whether the CSV file is in lat,lon
order versus lon,lat order, and report an error if the user picked
the wrong ordering (identifiable by a latitude exceeding +/- 90 degrees).
9. re-optimize the OSM importers to reduce the likelihood of excessive
garbage collection crashes on faster systems by reducing the number
of transient objects being created.
10. improve the documentation for timeslottable APRS ports.
11. in the ADS-B plugin, set the inactive station time interval separately
for aircraft, with a default inactive-before-purge time of 5 minutes
and a maximum of 60 minutes. Also display the distance and direction
of the aircraft relative to the YAAC station and the current
transponder squawk code.
12. in the AIS decoder plugin, ensure stale vessels are properly purged
from the system the same way stale APRS stations are purged. also
improve map symbols for some types of marine vessels and navigation
aids.
13. in the AREDN plugin, fix issues with AREDN nodes whose names exceed
the maximum length of APRS Objects, so that there aren't problems
with similarly named AREDN nodes on the map. also fix errors in the
calculation of line-of-sight obstructions.
14. correct error in Maven assembly of the distribution ZIP file.
15. add debugging support for sounds plugin playback of recorded .wav files.

In addition, the imported version of the 2024-May-12 snapshot of the
OpenStreetMap database is now available for download.

Enjoy!

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Thank you all for your replies.

I did not realize I needed a software TNC as well.? I will work on this.

Again, thank you !

73 Eric

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Hi All,

I have a iCom IC-8000 and Digirig interface on a Windows10 box, and I am having trouble getting YAAC to work.? I have set up a port for Serial_TNC in KISS Only and TX is locked on.? I have set RTS on and YAAC throws java errors.

Has anyone met with success using a Digirig on Win10?

73 Eric

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It’s a conspiracy - I blame Big Geography?

--
Cheers and 73 - Jon N7UV

This is what I'm seeing...



Best

Jeremy

Hi Andrew -

View>Layers>Show age was and remains on. The time since last position update is always displayed in small text below the main label. However, the value rarely changes.?

If I do Locate>(some a/c callsign)>OK then for the time during which the locate arrows are flashing all the on-map and in-range a/c icons on the screen update every second or so, consistent with my ADS-B browser window display. Once the arrows stop flashing, everything goes back to static.

And by static, I mean irregular but significant durations of time (120 sec? More?) pass between map updates. I assume that's either some process YAAC is doing for its own reasons or perhaps since I tell the map to stay centered on me. Even when I'm parked, the GPS dithers a bit, maybe it's enough to force a map re-center. But the a/c generally move several miles during that time.

Something else that would be nice would be to be able to set the persistence since last position update. Right now I think the ADS-B items may persist as long as any other thing, in most ADS-B instantiations 50-60 seconds without an update tosses the object off the list.

Oh, hey, one more item. While I can change the displayed font size, which is helpful especially on my mobile display, is there a way to bold the icon text? The text line widths are about the same as the background map lines and they all blend together. Maybe bolding would help me.?

I look forward to any enhancements!
--
Cheers and 73 - Jon N7UV

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CATS?