10.2.1 Broadcast Products Not Received

I have mentioned the same issue regarding the SIGMETs and AIRMET products not being received in one of the 10.2.1.0 threads. In past month, most flights have had one or the other (sometimes both) flagged. I have had a few flights that have received both SIGMETs and AIRMETs and consequently no advisory message.

I emailed Avidyne Tech support regarding this issue a few weeks ago; it was raised to engineering with no official reply as of today. As best as I can determine, I am getting the broadcast products fine (all other FIS-B and TIS-B are received). It appears sw10.2.1.0 is more aggressive about letting the user know that these products are not being receive as I too, never saw these messages in the two years prior to upgrading to sw10.2.1.0.

I found an ADSB reference that indicates that SIGMETs and AIRMETs are broadcast every 5 minutes if they are within 100NM of the ADSB tower. Effectively, this means SIGMETs and AIRMETs are received within 100 NM to 500 NM of the aircraft depending on how many ADSB towers the airplane is receiving (altitude). Based on the general weather I flew most of my flights in (VFR 3500 AGL and below), it appears my MLB100/SkyTrax100 and IFD540 was actually functioning properly; however, I agree there seems to be a change in the IFD540 reporting behavior. 

I just installed 10.2.1 today but was getting those messages fairly frequently with 10.2 also.  In each case, it seemed to be the Sigmets that were not being received.

I was going to mention your channel setup also but stopped because I saw you also have AIRINC 429 traffic from the MLB100 on your IFD440; however, no apparent RS-232 channels to/from your MLB100 on your IFD440. I would think CrossSync would deliver that info from the IFD540 as it essentially does with the IFD100. I only have a single IFD540 in my setup which makes a little unfamiliar with all of the nuances of CrossSync.

Thanks!

I’ve also seen the stale indications for AIRMETs, SIGMETs, and TFRs.

AviSteve wrote: The 10.2.1 release notes mention "Improved AIRMET/SIGMET decoding".  Part of the improvement was in the tracking of report reception in order to determine whether data is stale.  The IFD is supposed to receive SIGMETs every five minutes.  If 20 minutes go by without the IFD having received a valid report, the alert gets generated.  So what you're seeing now is an accurate indication of that condition.

That makes sense but I wonder why the sigmets are stale on every single flight now.  I realize it could have been like this before 10.2.1 with the IFD just not warning us but it's annoying to see on all my flights.  Is this just a function of ADS-B not putting the report as frequently as it should?

I am getting these SIGMET warnings also since upgrade to 10.2.1

HenryM wrote: I finally got to go flying today after the 10.2.1.0 update and had the same issue. I had an alert I couldn’t get rid of about weather not being received. Traffic from the SkyTrax 100 seemed to be displaying properly. I also saw the flags that represent VFR/MVFR/IFR conditions at at various airports. Playing with the simulator, I believe I found a way to get rid of the issue. When viewing the map, you can press the Wx Overlay LSK and turn off AIR/SIGMET. In the simulator, this gets rid of the alerts. It makes sense that if there are no AIR/SIGMETS but you ask to display them, you get a message that says you are not receiving them. The simulator does this too.

Has a determination been made as to the cause of the "Broadcast Products not Received" message along with the alert when Sigmets are not received 10 min into each flight?  If so, is a fix in the works?

teeth6 wrote: Has a determination been made as to the cause of the "Broadcast Products not Received" message along with the alert when Sigmets are not received 10 min into each flight?  If so, is a fix in the works?