Recently I've been looking into what sort of digital signals I can
monitor with my scanner and computer. I'm in Windsor, Ontario,
Canada, near Detroit, Michigan, USA.

I've monitored POCSAG and FLEX with PDW software. That's easy. There
are *lots* of frequencies, they're easy to find, the decoding is
reliable and there's a lot of stuff being transmitted, including a lot
of text.

Then there's MOBITEX. There are a few of those frequencies just below
940 Mhz. They are easy to find, the decoding is reliable, but the
vast majority of messages are encoded or encrypted or something, only
containing the text PCMIME or PCICAL. Is there software to decode
these?

ACARS is pretty simple to monitor too, though the messages are often
difficult to understand and actual english text messages are very
rare.

There's another pager format at 940.225, but PDW doesn't decode it
well and I don't see any cleartext.

I tried to find MDT frequencies for use with MDTMON but I wasn't able
to. Some things sound a lot like MDT but nothing happens in MDTMON.

I'd love to decode SSTV but my scanner doesn't go below 25 Mhz and
there's nothing on the SSTV frequencies above that.

Same with weather satellites... nothing... though perhaps my dipole
antenna isn't good enough.

The software I found can do RTTY and various other text formats but
that's below 25 Mhz generally.

What else can I monitor?

--
Boris