[EAS] FW: False tsunami alarm - analysis of more than one event

[Rich Parker]

One very interesting thing about that is how little 'padding' is
involved in making sure it is flagged as a 'test'  (the /T).

If you read some of the early literature regarding turn of the century
telegraph messages, one thing that stands out is the fact that while
senders tried very hard to reduce cost by abbreviating and otherwise
reducing characters, there were notable occasions where
misunderstandings occurred, with significant consequences (like 'buy'
instead of 'sell').

Something as important as these kinds of transmissions should probably
have a lot more 'padding' for redundancy and 'error correction' - and
we can see from last week's event here that it can have serious
consequences.

But it also does not fully answer the question your raise regarding
why it 'leaks out' sometimes and not others when the /T is missing.
That is a rather interesting outcome as well.

Rich Parker
Director of Engineering
CoastAlaska

On Mon, May 14, 2018 at 6:20 AM, Ed Czarnecki
<ed.czarnecki at monroe-electronics.com> wrote:
> Rich - this is from Rob Dale, in a mirror discussion on another list.  This might clarify things a bit on the inadvertent tsunami alert from last week.
>
> Ed