In a message dated 98-10-14 19:03:31 EDT, you write: harry<< The first observation will be recorded at 1800-1900 UT and each succeeding observation will occur four minutes earlier each day. >> For comparison purposes and other unexpected surprises, you might want to start recording around 1800 and end 2000 UT? I think you would have better coverage during these two hours? George Zay