Originally Posted by
mm43
In this particular case and others that went before it, the FR24 range of this station was at its limit. Corrupt data due to that alone is more likely the case.
No. Read up on altitude encoding/decoding.
No matter how many bits of the AC may have been corrupted, if any, it will still only resolve to an altitude that's a multiple of 25' or 100', depending on which encoding schema is used. There simply aren't enough bits in the ADS-B packet to encode altitudes to the nearest foot, despite what the FR24 data implies.