The soviet Meteor 3-5 is a low-orbit polar orbiting satellite. The period is approximately 109 minutes. This satellite is not sun-synchronous: each day a slight shift occurs in the pass schedule, which makes it difficult to observe phenomena at one location, as the lighting changes continually. Still, as it uses the entire 0.5 second interval to send just one line, the resolution is very good.
Meteor 3-5 was launched on August, 15 1991. Regretably, it stopped functioning in 2002, leaving only the NOAA series, after initial problems with the mechanical scanning system, and later problems with the power supply.
One audio line:
|Name before launch||
|Actual name||METEOR 3-5||