It is often written that attempts to establish radio contact with the Progress was only when it flew within sight of Russian ground stations. But why ground stations of other countries could not make this, such as the US stations?
Quote from: asmi on 05/05/2015 05:49 pmQuote from: Chris Bergin on 05/05/2015 05:29 pmT.S. Kelso @TSKelso 5m5 minutes agoLatest Space Track decay prediction is May 8 at 1217 UTC +/-48 hours. That puts prediction time over NE Africa:This statement doesn't make sense to me - ±48 hrs is ~64 orbits - which means it can be anywhere.Its perigee on each orbit will limit to some degree where reentry can occur
Quote from: Chris Bergin on 05/05/2015 05:29 pmT.S. Kelso @TSKelso 5m5 minutes agoLatest Space Track decay prediction is May 8 at 1217 UTC +/-48 hours. That puts prediction time over NE Africa:This statement doesn't make sense to me - ±48 hrs is ~64 orbits - which means it can be anywhere.
T.S. Kelso @TSKelso 5m5 minutes agoLatest Space Track decay prediction is May 8 at 1217 UTC +/-48 hours. That puts prediction time over NE Africa:
Latest Space Track decay prediction (dated May 7 at 0310 UTC) is May 8 at 0332 UTC with a "window" of 1080 minutes (18 hours). AFAIU this means a decay possible from May 7 at 1832 UTC to May 8 at 1210 UTC
Note that the data do appear to indicate that the Progress vessel is experiencing a very fast rotation rate of around one revolution every 1.8 seconds.
Quote from: Jester on 05/07/2015 09:47 amNote that the data do appear to indicate that the Progress vessel is experiencing a very fast rotation rate of around one revolution every 1.8 seconds.The spin of the Progress spacecraft has been accelerating?
More precise decay prediction from Space Track (NORAD) dated May 7 at 1304 UTC:Decay expected May 8 at 0136 UTC +/- 60 minutes (so May 8 from 0036 UTC to 0236 UTC)
Quote from: input~2 on 05/07/2015 02:20 pmMore precise decay prediction from Space Track (NORAD) dated May 7 at 1304 UTC:Decay expected May 8 at 0136 UTC +/- 60 minutes (so May 8 from 0036 UTC to 0236 UTC)That's within one orbit. Did the prediction include median point co-ordinates?