FlightAware Discussions

MLAT Client not synchronised

Hi,
I recently started to get ( or recently realised I had ) some issues with the mlat-client reporting it was not synchronised with any servers.
I had a look around this forum, and the RPI power supply was mentioned several times, as was cpu load.
To try to remove that element, I moved piaware to a mini-pc I have, with a mobile celeron processor - as it was Intel, I used two docker images ( mikenye/piaware & mikenye/readsb-protobuf ) in place of the arm binaries.
These turned out to be very easy to setup, but the problem is still there.
I notice it often returns to 400 - 500 servers immediately after failing to sync…

The rest of the setup is a cantenna + 2M cable + flightaware pro-stick plus - it runs indoors in front of a window.
Would you have any advice on what might be the issue or what I might try next?

full mlat-client logs
[piaware] 2021/01/10 23:49:44 mlat-client(3283): Server status: synchronized with 244 nearby receivers
[piaware] 2021/01/11 00:04:44 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 00:19:45 mlat-client(3283): Server status: synchronized with 498 nearby receivers
[piaware] 2021/01/11 00:34:45 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 00:49:45 mlat-client(3283): Server status: synchronized with 449 nearby receivers
[piaware] 2021/01/11 01:04:45 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 01:19:45 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 01:34:46 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 01:49:46 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 02:04:46 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 02:19:46 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 02:34:46 mlat-client(3283): Server status: synchronized with 409 nearby receivers
[piaware] 2021/01/11 02:49:47 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 03:04:47 mlat-client(3283): Server status: synchronized with 478 nearby receivers
[piaware] 2021/01/11 03:19:48 mlat-client(3283): Server status: synchronized with 435 nearby receivers
[piaware] 2021/01/11 03:34:48 mlat-client(3283): Server status: synchronized with 301 nearby receivers
[piaware] 2021/01/11 03:49:48 mlat-client(3283): Server status: synchronized with 391 nearby receivers
[piaware] 2021/01/11 04:04:49 mlat-client(3283): Server status: synchronized with 215 nearby receivers
[piaware] 2021/01/11 04:19:49 mlat-client(3283): Server status: synchronized with 347 nearby receivers
[piaware] 2021/01/11 04:34:49 mlat-client(3283): Server status: synchronized with 524 nearby receivers
[piaware] 2021/01/11 04:49:49 mlat-client(3283): Server status: synchronized with 498 nearby receivers
[piaware] 2021/01/11 05:04:50 mlat-client(3283): Server status: synchronized with 305 nearby receivers
[piaware] 2021/01/11 05:19:50 mlat-client(3283): Server status: synchronized with 522 nearby receivers
[piaware] 2021/01/11 05:34:50 mlat-client(3283): Server status: synchronized with 377 nearby receivers
[piaware] 2021/01/11 05:49:51 mlat-client(3283): Server status: synchronized with 409 nearby receivers
[piaware] 2021/01/11 06:04:51 mlat-client(3283): Server status: synchronized with 526 nearby receivers
[piaware] 2021/01/11 06:19:51 mlat-client(3283): Server status: synchronized with 419 nearby receivers
[piaware] 2021/01/11 06:34:51 mlat-client(3283): Server status: synchronized with 359 nearby receivers
[piaware] 2021/01/11 06:49:52 mlat-client(3283): Server status: synchronized with 412 nearby receivers
[piaware] 2021/01/11 07:04:52 mlat-client(3283): Server status: synchronized with 469 nearby receivers
[piaware] 2021/01/11 07:19:52 mlat-client(3283): Server status: synchronized with 264 nearby receivers
[piaware] 2021/01/11 07:34:52 mlat-client(3283): Server status: synchronized with 499 nearby receivers
[piaware] 2021/01/11 07:49:52 mlat-client(3283): Server status: synchronized with 454 nearby receivers
[piaware] 2021/01/11 08:04:53 mlat-client(3283): Server status: synchronized with 282 nearby receivers
[piaware] 2021/01/11 08:19:53 mlat-client(3283): Server status: synchronized with 410 nearby receivers
[piaware] 2021/01/11 08:34:53 mlat-client(3283): Server status: synchronized with 468 nearby receivers
[piaware] 2021/01/11 08:49:53 mlat-client(3283): Server status: synchronized with 352 nearby receivers
[piaware] 2021/01/11 09:04:54 mlat-client(3283): Server status: synchronized with 448 nearby receivers
[piaware] 2021/01/11 09:19:54 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 09:34:55 mlat-client(3283): Server status: synchronized with 459 nearby receivers
[piaware] 2021/01/11 09:49:55 mlat-client(3283): Server status: synchronized with 330 nearby receivers
[piaware] 2021/01/11 10:04:55 mlat-client(3283): Server status: synchronized with 489 nearby receivers
[piaware] 2021/01/11 10:19:55 mlat-client(3283): Server status: synchronized with 492 nearby receivers
[piaware] 2021/01/11 10:34:56 mlat-client(3283): Server status: synchronized with 502 nearby receivers
[piaware] 2021/01/11 10:49:56 mlat-client(3283): Server status: synchronized with 338 nearby receivers
[piaware] 2021/01/11 11:04:57 mlat-client(3283): Server status: synchronized with 230 nearby receivers
[piaware] 2021/01/11 11:19:57 mlat-client(3283): Server status: synchronized with 507 nearby receivers
[piaware] 2021/01/11 11:34:57 mlat-client(3283): Server status: synchronized with 495 nearby receivers
[piaware] 2021/01/11 11:49:58 mlat-client(3283): Server status: synchronized with 416 nearby receivers
[piaware] 2021/01/11 12:04:58 mlat-client(3283): Server status: synchronized with 429 nearby receivers
[piaware] 2021/01/11 12:19:58 mlat-client(3283): Server status: synchronized with 509 nearby receivers
[piaware] 2021/01/11 12:34:58 mlat-client(3283): Server status: synchronized with 402 nearby receivers
[piaware] 2021/01/11 12:49:59 mlat-client(3283): Server status: synchronized with 308 nearby receivers
[piaware] 2021/01/11 13:04:59 mlat-client(3283): Server status: synchronized with 437 nearby receivers
[piaware] 2021/01/11 13:19:59 mlat-client(3283): Server status: synchronized with 331 nearby receivers
[piaware] 2021/01/11 13:35:00 mlat-client(3283): Server status: synchronized with 469 nearby receivers
[piaware] 2021/01/11 13:50:00 mlat-client(3283): Server status: synchronized with 382 nearby receivers
[piaware] 2021/01/11 14:05:01 mlat-client(3283): Server status: synchronized with 269 nearby receivers
[piaware] 2021/01/11 14:20:01 mlat-client(3283): Server status: synchronized with 356 nearby receivers
[piaware] 2021/01/11 14:35:01 mlat-client(3283): Server status: synchronized with 457 nearby receivers
[piaware] 2021/01/11 14:50:01 mlat-client(3283): Server status: synchronized with 256 nearby receivers
[piaware] 2021/01/11 15:05:01 mlat-client(3283): Server status: synchronized with 326 nearby receivers
[piaware] 2021/01/11 15:20:01 mlat-client(3283): Server status: synchronized with 364 nearby receivers
[piaware] 2021/01/11 15:35:02 mlat-client(3283): Server status: synchronized with 416 nearby receivers
[piaware] 2021/01/11 15:50:02 mlat-client(3283): Server status: synchronized with 322 nearby receivers
[piaware] 2021/01/11 16:05:02 mlat-client(3283): Server status: synchronized with 361 nearby receivers
[piaware] 2021/01/11 16:20:03 mlat-client(3283): Server status: synchronized with 251 nearby receivers
[piaware] 2021/01/11 16:35:03 mlat-client(3283): Server status: synchronized with 284 nearby receivers
[piaware] 2021/01/11 16:50:03 mlat-client(3283): Server status: synchronized with 396 nearby receivers
[piaware] 2021/01/11 17:05:04 mlat-client(3283): Server status: synchronized with 448 nearby receivers
[piaware] 2021/01/11 17:20:04 mlat-client(3283): Server status: synchronized with 385 nearby receivers
[piaware] 2021/01/11 17:35:04 mlat-client(3283): Server status: synchronized with 291 nearby receivers
[piaware] 2021/01/11 17:50:05 mlat-client(3283): Server status: synchronized with 328 nearby receivers
[piaware] 2021/01/11 18:05:05 mlat-client(3283): Server status: synchronized with 255 nearby receivers
[piaware] 2021/01/11 18:20:05 mlat-client(3283): Server status: synchronized with 294 nearby receivers
[piaware] 2021/01/11 18:35:06 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 18:50:06 mlat-client(3283): Server status: synchronized with 565 nearby receivers
[piaware] 2021/01/11 19:05:06 mlat-client(3283): Server status: synchronized with 330 nearby receivers
[piaware] 2021/01/11 19:20:06 mlat-client(3283): Server status: synchronized with 408 nearby receivers
[piaware] 2021/01/11 19:35:07 mlat-client(3283): Server status: synchronized with 228 nearby receivers
[piaware] 2021/01/11 19:50:07 mlat-client(3283): Server status: synchronized with 348 nearby receivers
[piaware] 2021/01/11 20:05:07 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 20:20:07 mlat-client(3283): Server status: synchronized with 205 nearby receivers
[piaware] 2021/01/11 20:35:08 mlat-client(3283): Server status: synchronized with 399 nearby receivers
[piaware] 2021/01/11 20:50:08 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 21:05:08 mlat-client(3283): Server status: not synchronized with any nearby receivers
[piaware] 2021/01/11 21:20:08 mlat-client(3283): Server status: synchronized with 406 nearby receivers

You require ADS-B aircraft being received by other receivers and you to synchronize.
I’d guess no ADS-B aircraft at night? :slight_smile:

Thanks – I guess I’d looked at a couple of spots like 9.15 / 18.35 and assumed that it’s an unexpected drop out. But actually watching things today more closely it seems it does go through very quiet patches… I’ll keep watching
Thanks for the pointer