Doesn't matter which row or column in Table 5?

[CarlosPindle]

Ed & Rumata,

Table 5 in Pub. No. 249 gave me the same results you're describing. 

Thanks to Rumata, Pub. No. 229 gives the basic formula as seen below.  After running a few examples through the calculator the correct results were obtained every time using the formula.

So far....so good.

Thanks for the ideas men.

Roland

Now I'm really confused!  What "altitude difference"?  Is that the altitude difference between the uncorrected Hc found in Pub No. 249 (or  229) and Ho?

Thanks fellas,

Carlos