Not more than 400 km. The conversion period is 90 minutes. Yes, look at yourself http://re-actor.net/space/992-iss-live-stream.html NASA camcorders link is blocked by the decision of the project administration. lizard-tail. com / isana / tracking / the real position of the ISS (here the Spaces clean after the points)
The height of the ISS orbit is constantly changing. Due to the remnants of the atmosphere, there is a gradual braking and decrease in altitude. All incoming ships help raise the height at the expense of their engines. At one time they were limited to compensating for the decline. Recently, the height of the orbit has steadily increased. 10 Feb 2011 The altitude of the International Space Station flight was about 353 kilometers above sea level. 15 June 2011 increased by 10,2 kilometer and amounted to 374,7 kilometer. 29 June 2011 orbit height was 384,7 km. In order to reduce the influence of the atmosphere to a minimum, the station had to be raised to 390400 km, but the American shuttles could not rise to such a height. Therefore, the station was kept at altitudes of 330350 km by periodic correction by engines. Due to the end of the program of shuttles, this restriction has been lifted.