Author Topic: LIVE: Long March 5 maiden flight - SJ-17 - WSLC - November 3, 2016 (12:43 UTC)  (Read 74334 times)

Offline input~2

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People on Chinese forums are active discussing (with serious calculations using burn time data as seen from the webcast, the leaked flight profile posted here earlier and NORAD orbital data) that the 2nd stage might have some apparent performance issues during its 2nd burn which left the upper stage in a lower orbit than planned, forcing it to burn longer to geostationary orbit. I don't have time to translate the notes yet but here's the source if you want to read them: http://bbs.9ifly.cn/forum.php?mod=viewthread&tid=14326&extra=page%3D1&page=96 (roughly from page 96 onwards to the end of that thread right now)
Is that related to second burn of 2nd stage being 11.3s short as mentionned above

Online gosnold

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Isn't the 2nd stage dangerously close to the GEO belt?

Offline input~2

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SJ-17 drift rate further reduced down to 0.9/day.
First potential GEO position: 163E
Position confirmed: The most recent TLE published after this post indicates that SJ-17 has been stabilized at 162.8E

Offline input~2

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Isn't the 2nd stage dangerously close to the GEO belt?
You mean YZ-2 (its in 35647 x 39968 km x0.4)
2nd stage is in an orbit much lower than the GEO belt and could decay soon (185 x 29055 km x 19.4)

Offline weedenbc

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Is there a good summary of satellite space surveillance and/or satellite inspection programs by the major space powers?
I've found individual listings on Gunter's Space Page.

I've written pretty extensively about Russian, Chinese, and American rendezvous and proximity operations programs, including satellite inspections, here:
http://www.thespacereview.com/article/1689/1
http://www.thespacereview.com/article/2839/1
---
Brian Weeden

Online Phillip Clark

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During April 25-May 2 this year the orbital period of Shijian 17 was raised to 1,437.5 minutes, then 1,437.6 minutes and most recently to 1,437.8 minutes, resulting in the satellite drifting westwards, away from its "home" over ~162 deg E.

Offline input~2

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During April 25-May 2 this year the orbital period of Shijian 17 was raised to 1,437.5 minutes, then 1,437.6 minutes and most recently to 1,437.8 minutes, resulting in the satellite drifting westwards, away from its "home" over ~162 deg E.
Now 1,438.9 minutes

Online Phillip Clark

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Since around June 21 Shijian 17 has been stationed over ~124-125 deg E.

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