Re: Foton 12 R/B

Dale Ireland (
Sat, 25 Sep 1999 10:09:36 -0700

I am curious if anyone knows if a very large surface high barometric
pressure area causes increased atmospheric density up to 90 or more Km
high or if solar activity affects high atmospheric density in localized

Dale Ireland
Astronomy Page
Comets, Satellites, Eclipses, Photography, Fabrications
----- Original Message -----

From: Ted Molczan <

that satellites
> begin to glow at a height of about 90 km. I imagine that the exact
> depends on the object's orbital velocity and the local atmospheric
density at
> perigee.