[amsat-bb] Orbital Decay and Atmospheric Density

[John Heath]

Hi Gents,
 
I have been working on an excel spreadsheet regarding ARISSat-1, orbital decay and atmospheric density.
Its a small workbook with some calculations and a  chart.
 
The idea is to work out the volume that ARISSat-1 sweeps through per orbit, then calculate the mass of atomic material it will colloid with. 
Math is NOT my best subject
.
Is there a math guru on the list willing to take a quick look and tell me if I am on the right lines.
 
Let me know and I will send it off list.
 
Thanks
 
John 
G7HIA