Slow scan televison is a way of sending video over a voice bandwidth channel--this can make it practical to send video over thousands of miles via ionospheric propagation.  Modern computers make this once rare and expensive mode readily available to the average ham. Other ways to work with images over radio are discussed on the Image Modes page.

TV on 10  QST April 2001, pp. 68-71  Swap pictures on 10 meters around the world.

Slow-Scan TV - It Isn't Expensive Anymore! John Langer WB2OSZ QST Jan 1993, pp. 20-30
This old article has a glossary of definitions and contemporary standards. Includes the Pasokon SSTV hardware interface schematic.

• Slow Scan images transmitted by the International Space Station.
• SSTV - the basics using MMSTV113A.exe MM Hamsoft Amateur Radio Freeware.  Be careful about what you download from the page.