From: Willie Strickland <cwskas@earthlink.net>

Date: November 22, 2009 2:50:09 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: measuring brightness

Here are the formulas

G2  =B1802-B2

H2  =AVERAGE(D2:D1802)

I2  =MEDIAN(D2:D1802)

If anyone can assist me with this, lets take the discussion off-list.  Please, contact me via email.

Willie

willie@igc.org