[lxgr]

> Erm mate, have you tried looking at different days ? Those cells you find so suspicious in Australia are not there on other days !

That kind of disproves the "no data" hypothesis though, no?

One explanation could be they have a simplistic algorithm like "if uncertainty > (something indicating more than 5 minutes of GNSS-to-INS fallback) on more than 50% of all flights of a day", and there's only one flight per day in that region.

> Seriously, given the largely community-based nature of FR24 data I would not expect too much in term of accuracy.

Flightradar24 data is accurate enough for some commercial entities to rely on it. Also, in case of a lack of ADS-B receiver data we'd also expect a grey square, not a red one, right?

[trollian]

I thought it might have been Square Kilometer Array interference but that's to the north of those spots.