in reply to print to match multiple pattern
Use of uninitialized value $t7 in pattern match (m//) at ./program_2.pl line 14.
So, have you looked at the contents of @t? Have you verified that it contains what you want? Perl starts counting array indices at 0. Are you sure that the data in the eighth column is what you want?
the data in the 8th column that shows "HIGH", "LOW", "LRR"
The ISS (or other satellites)
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