Mike and  Dimitry  your two posts are exactly what I was looking for  1) The Amsat-UK.org website that has most SQF files  2) SatPC32 users W9KE doppler.sqf editor. These really help a new guy. The SatPC32 manual is ok but seeing the table and knowing what they are helps to understand the program.TNX AGN 73 Mike  K4MIA