OBSERVATION
The expected interval arrived.
No signal was detected.
The archive remained active
for several minutes afterward.
No explanation was recorded.
OBSERVATION
The recovered sequence
ends one frame earlier than expected.
The missing frame cannot be restored.
No corruption was detected
in the surrounding data.
OBSERVATION
A second interval was recorded
immediately after the signal ended.
No transmission was detected
during that interval.
The archive has no explanation
for the additional record.