Editing Automatic picture transmission (section)

== Future ==
With improvements in electronics, analog transmission systems have given way to digital transmissions systems. [[NOAA-19]], called [[NOAA-N']] prior to its launch on 6 February 2009, is the last satellite to carry an APT system.<ref>{{Cite web |url=http://noaasis.noaa.gov/NOAASIS/ml/future.html |title=Future NOAA Polar Orbiting and Geostationary Satellite Systems - NOAA Satellite Information System (NOAASIS); Office of Satellite and Product Operations |access-date=2015-04-27 |archive-url=https://web.archive.org/web/20150502135907/http://noaasis.noaa.gov/NOAASIS/ml/future.html |archive-date=2015-05-02 |url-status=dead }}</ref> The [[MetOp]] program, a collaboration between [[NOAA]] and [[EUMETSAT]], has switched to [[Low Rate Picture Transmission]] (LRPT) for its new polar-orbit satellites.

Since the [[NOAA-20]] satellite, most of the NOAA satellites have their lowest transmission frequency at 7812 MHz in the [[C band (IEEE)|C Band]], making reception by the general public impractical since unlike older schemes (APT, LRPT, [[LRPT|HRPT]]) they require a [[dish antenna]] with a specialised [[antenna feed]] etc.