Weather Satellite Software and Other Stuff
The picture was from my METEOSAT weather satellite reception
system. The key element of the system is the DEM1691-to-137MHz
downconverter. (Actually, since I moved back to the USA in 1998,
I haven't had a chance to set it up here...)
- Realtime: A Win95/NT
program to run other programs at elevated priority.
- Setmix: A Win95/NT command-line
program to set a soundcard's recording input level and L/R balance.
- R139.ZIP: A PIC16F84 program
that provides carrier-controlled scanning for a Hamtronics R139 Weather
Satellite receiver. (Includes a lovingly hand-crafted schematic
diagram...) Here are a couple of pictures of
the circuit, as installed in my R139. The PCI circuit is built in
a little prototyping board from Micro
Engineering Labs, and it connects to the R139 main board by a DIP
header plug that replaces one of the ICs. Correction: A missing resistor
was added to the schematic on 1/31/2003. Thanks to Todd
WD6DFH for noticing the error!
- An improved feed circuit for the
"turnstile"-style weather satellite antenna that Cirkit in the U.K. sell.