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eastham / tar1090

Provides an improved webinterface for use with ADS-B decoders readsb / dump1090-fa
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Does a local tar1090 instance show replay history instantly, or is there a 30 minute delay? #4

Open eastham opened 5 months ago

eastham commented 5 months ago

there's a delay on adsbexchange.com, not sure about the local version.

harpermann commented 5 months ago

Individual aircraft show instantly (on refresh) in the left hand column history on my local version. BUT, for the main display at http://rpi4/tar1090/?replay, the page refreshes on 30 minute intervals. So you could be within a minute or so if you happen to refresh the page near the refresh time.

harpermann commented 5 months ago

adsbexchange.com works the same way. Looks like if we can figure out the icao designation of the aircraft we want, we can see instant replay but I don't see a way to discover the aircraft if it disappears prior to the main screen 30 minute update. So we could have to wait 30 if timing is not optimal for a replay we want and we don't know what icao it is. This doesn't seem like a show-stopper. Next we need to try restoring the history to a fresh version to verify we can tar or otherwise save the directory for history. Fortunately, it's only somthing like two weeks of data.

I'm guessing tar1090 only actually writes history every 30 minutes. The instant we see on an individual aircraft may be in memory. Wonder why you couldn't include that in the main replay page. I may take a look at the code our of curiousity.