NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunars barometric pressure correction
From: Bill B
Date: 2005 Apr 22, 18:48 -0500
From: Bill B
Date: 2005 Apr 22, 18:48 -0500
> Yes, and given today's cheap computing, might as well use the exponential > formula. By the way, you can also use it to answer the question "where does > space begin?" Just set the equation for density of the air: > density = exp(-altitude/34,000feet) > equal to 0 and solve for the altitude. :-) Frank Got it, mostly. In nautical miles 2.718281828^altitude=(1/x)^5.595786702 Plug in the smallest number my TI register will handle for density (x): x= 0.000000001 Answer 116 nm What do you get with x=0 :-) Thanks for the growth exercise. Bill