VHF Antenna
High quality weather proof construction

Crossed Dipole, turnstile design

For receiving images from the `Polar orbiting satellites', which transmit
Automatic Picture Transmission (APT) signals in the 137MHz band. Current
satellites include the American NOAA series and Russian Meteor or Sich
series. These tend to be sun-synchronous, with two orbits passing at or near
overhead at the same times each day, 12 hours apart. APT resolution is about
4km per pixel and two channels are usually transmitted, Visible and Infra
Red.

The 137MHz band is a fairly easy band in which to build your own equipment
and is relatively inexpensive as a band to start with. Provided you own a PC
then it is possible to get started receiving APT signals for a little as
Receiver kit and antenna by using shareware to decode the signal, using the
power of your computer sound card.



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