Author Topic: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION  (Read 122922 times)

Offline shooter6947

  • Full Member
  • *
  • Posts: 101
  • Idaho
  • Liked: 72
  • Likes Given: 266
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #360 on: 11/02/2017 08:50 PM »
The atmosphere doubles in density roughly every 20 km
Actually the pressure increases by a factor of e=2.81828 every 10 km or so -- Earths' scale height.  Density increases commensurately for same temperature, but varies as PV=nRT otherwise.  So much steeper than you suggest -- density goes up more like a factor of 8 for every 20 km.

Offline FutureSpaceTourist

  • Senior Member
  • *****
  • Posts: 4451
  • UK
    • Plan 28
  • Liked: 3018
  • Likes Given: 999
Re: SpaceX Falcon 9 : BulgariaSat-1 : June 23, 2017 : DISCUSSION
« Reply #361 on: 11/03/2017 08:18 AM »
Quote
Falcon 9 stage 2 from the Bulgariasat-1 launch reentered at 1813 UTC Oct 31 over Parana, Brazil. Earlier estimate of Oct 27 decay was wrong

https://twitter.com/planet4589/status/926314875227385856

Tags: