Originally Posted by
klintE
Worth to notice that time interval between reported positions on that screen is up to above two min.
Even if there were some intermediate points not shown on graph, generally it doesn't work continuously but in rather large intervals.
Therefore, no "ping" between FL240 and impact, doesn't implicate (for me) in-flight break up.
The base of radar cover for secondary radar is higher than the base of reception for ADS-B. The SSR was out of line of sight several seconds before the ADS-B was out of line of sight. This is precisely what would be expected even with collocated receivers.