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Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color. A literal term for SSTV is narrowband television .
It is also possible to send digital data to the ISS via laptop computers, similar to an email communication, using radio frequencies instead of telephone or cable connections [citation needed]. On November 12, 2000 the first amateur radio contacts were made from the International Space Station during Expedition 1.
The TV photos were displayed back on the Earth on a slow-scan TV monitor that was coated with a long-persistence phosphor. Its persistence had been selected to match the nominal maximum frame rate . One frame of TV identification was received for each incoming TV photo, and the picture was displayed in real-time at a rate compatible with that ...
There are three ways to reduce the bandwidth of a video signal: reduce the scan rate, reduce the image size, and/or (with digital television) use heavier compression.When the scan rate is reduced, this is referred to as slow-scan TV or, in the most extreme cases when the scan rate is too slow to simulate motion, freeze frame television.
Propagation is similar to the lowest UHF TV broadcast channels. Additionally, this band can be easily received by simply tuning any cable-ready analog television or cable-box to the cable TV channels below and connecting an outdoor TV antenna. Amateur TV signals are much weaker than broadcast TV, so a preamplifier is often used to improve ...
The television images were displayed on Earth on a slow-scan monitor coated with a long persistency phosphor. The persistency was selected to optimally match the nominal maximum frame rate. One frame of TV identification was received for each incoming TV frame, and it was displayed in real time at a rate compatible with the incoming image.
Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
A frame taken from an animation of slow scan TV images taken on a flyaround inspection of the station by the shuttle. Pettit and Kimbrough used the station's Canadarm2 to move Leonardo from the Harmony module and placed in the shuttle's cargo bay at 21:52 UTC.