What is the vacuum at the Karman line?

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SUMMARY

The vacuum at the Karman line, located at 100 km altitude, is approximately 2.4 x 10-4 Torr, according to a calculator linked in the discussion. However, other sources indicate a pressure range between 1.09 and 0.0075 Torr. The consensus among participants suggests that the pressure at this altitude is around 0.03 Pa or 2 x 10-4 Torr. Discrepancies in data highlight the need for reliable calculators that accommodate high altitudes accurately.

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  • Understanding of atmospheric pressure and vacuum concepts
  • Familiarity with pressure units such as Torr and Pascal (Pa)
  • Knowledge of altitude effects on pressure
  • Basic proficiency in interpreting scientific charts and graphs
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Aerospace engineers, atmospheric scientists, students studying physics, and anyone interested in high-altitude pressure measurements will benefit from this discussion.

mesa
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Hey guys, what is the vacuum at the Karman line (100km straight up).

I found conflicting sources on this. Wikipedia links to a calculator that states it is ~2.4*10^(-4)T, while another chart I found says it is in between 1.09 and .0075 Torr:

http://www.orbitec.com/documents/Orbitec_Vacuum_Reference.pdf

I always thought it was around 10^(-3)T.

Any help would be appreciated!
 
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That calculator is massively wrong for high altitudes, the other two calculators linked here don't allow those heights.

Going by this chart, pressure is 0.03 Pa or 2*10-4 torr.
Note that the graph agrees well with the "mm Hg" and kg/(sq cm) columns for 45 km and 200 km. The torr entry in the 200 km row seems to be wrong, it does not agree with mm Hg column.
 

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