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Author Topic: No mode-S receive for certain ac  (Read 3499 times)

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Levery

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No mode-S receive for certain ac
« on: May 11, 2009, 08:32:48 PM »
Hello all, i just would like any any comments or ideas why am not recieving certain types of aircraft when am at the airport using the supplied antenna. Here are a few types that i don't recieve, EP-3C, AS355 Twin star, SW4 merlin and othe small general aviation ac. etc C172, Piper........  any help would be great, those are the major traffic that we deal with here on my island. Thanks!
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Located 10 km SE Hato Airport (TNCC)

RodBearden

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Re: No mode-S receive for certain ac
« Reply #1 on: May 11, 2009, 08:39:34 PM »
Hi Levery

Most light aircraft, Embraer and similar regional airliners, and helicopters don't broadcast their position, and will therefore never appear on the map.

Many do broadcast a Mode-S code possibly along with their altitude and flight ID, and RB should be picking them up, so they will appear on the list but not on the map.

The next version of the RB software will pick up more of these than the current version does - watch this space!

Hope that helps.

Rod
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Levery

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Re: No mode-S receive for certain ac
« Reply #2 on: May 11, 2009, 09:27:26 PM »
Yes i do understand that they won't appear on the map, but many of them don't show up on the list. I see one but don't see the other even though i can see them in front me, it's not a big deal just was wondering why. Thanks for the quick response.

Larry
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Located 10 km SE Hato Airport (TNCC)

ACW367

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Re: No mode-S receive for certain ac
« Reply #3 on: May 12, 2009, 08:23:52 PM »
Those aircraft will be the ones that do not have a transponder fitted at all or do not have it turned on.  Many GA types and the odd mil type are not even equipped with a transponder.
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DaveReid

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Re: No mode-S receive for certain ac
« Reply #4 on: May 12, 2009, 08:34:31 PM »
Quote from: RodBearden on May 11, 2009, 08:39:34 PM
The next version of the RB software will pick up more of these than the current version does - watch this space!

Sounds intriguing. 

Do you mean that RB will pick up some aircraft that it doesn't pick up at all at the moment, or simply that it will pick up more data on the aircraft it already picks up (e.g. flight IDs that aren't currently being decoded) ?
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tarbat

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Re: No mode-S receive for certain ac
« Reply #5 on: May 12, 2009, 08:37:37 PM »
V2.10 doesn't pick up more aircraft, but does pickup FlightIDs for more aircraft.  And route lookup for those FlightIDs.
« Last Edit: May 12, 2009, 08:40:54 PM by tarbat »
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DaveReid

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Re: No mode-S receive for certain ac
« Reply #6 on: May 12, 2009, 09:00:10 PM »
Quote from: tarbat on May 12, 2009, 08:37:37 PM
V2.10 doesn't pick up more aircraft, but does pickup FlightIDs for more aircraft.  And route lookup for those FlightIDs.

That makes sense - I thought the suggestion that it would pick up more aircraft was too good to be true  :-)
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RodBearden

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Re: No mode-S receive for certain ac
« Reply #7 on: May 12, 2009, 09:02:46 PM »
Yes, as Tarbat says, V2.1 will pick up more Flight ID's, not more aircraft - we've already discussed this here: http://www.airnavsystems.com/forum/index.php?topic=1372.0

Rod
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