Automatic Picture Transmission - the analogue transmission standard used on the 137MHz band from polar orbiting satellites.  A simple omni-directional antenna will pick up these broadcasts.

satellite pass crossing the equator from south to north.

Advanced TIROS Operational Vertical Sounder.  Data from multi-channel thermal and microwave sensors carried on the polar orbiters.  By providing multiple channels, some information about the profile o [..]

typically typically on spectral channel (q.v.) derived from detecting radiation at a certain well-defined wavelength.  The 12 Meteosat-8 channels are described here.

Digital Video Broadcasting.  A standard for video broadcasting with variants for cable (DVB-C), satellite (DVB-S) and terrestrial (DVB-T) methods.  The DVB-S system is used for EUMETCast from the Euro [..]

DVB satellite TV and data receiver which is external to (not requiring installation  inside) your computer which plugs into a USB port.  

European ATOVS Retransmission Service.  Service operated by EUMETSAT which takes data from the polar orbiting satellites and broadcasts it over EUMETCast.  This means that you do not need a complex tr [..]

EUMETSAT Key Unit - a USB-based eToken which plugs into your PC's USB port to allow access to EUMETCast data streams.  You can purchase an EKU from EUMETSAT.

European Space Agency responsible for satellite launches.

 system for sending a digital data stream over a DVB link.  Operated by EUMETSAT, the current broadcasts include data from the geostationary Meteosat-8 and GOES satellites, ATOVS data from the polar o [..]