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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 .
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.
Apollo 7 slow-scan TV, transmitted by the RCA command module TV camera. NASA decided on initial specifications for TV on the Apollo command module (CM) in 1962. [2] [ Note 1] Both analog and digital transmission techniques were studied, but the early digital systems still used more bandwidth than an analog approach: 20 MHz for the digital system, compared to 500 kHz for the analog system. [2]
N2YO provides real time tracking and pass predictions with orbital paths and footprints overlaid on Google Maps. [6] It features an alerting system that automatically notifies users via SMS and/or email before International Space Station crosses the local sky. The N2YO.com system powers ESA's, Space.com's and many other's satellite tracking web ...
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Slow-scan television, a picture transmission method Sun Siyam TV , a Maldivian television channel Submerged Shock Test Vehicle - weaponry test to discover Weapon-Induced (Near Miss) Shock, meaning shock motions (displacement) experienced by any part of weapon itself or its assembly, i.e. while testing of SLATACMS .
The image is miscaptioned. It's from 2021 and not new or "breaking." It also doesn't show a bus crash. It shows a fire at an Illinois chemical plant.
(The Center Square) – Illinois correctional officers have reported overdose symptoms after handling inmates' mail, and now Republicans are calling to suspend or electronically scan incoming mail ...