Update README.md

README.md

@@ -87,4 +87,5 @@ The report TSV file contains the following columns:
 <b>seq_length</b> : the length (in nucleotides) of the consensus sequence generated by FluViewer
 
 <b>sequenced_bases</b> : the number of nucleotide positions in the consensus sequence with sufficient depth of coverage (set by -D argument) and a succesful base call (e.g. A, T, G, or C)
-<b>segment_cov</b> : the length of the consensus sequence divided by the typical length of this genome segment (as a percentage).
+
+<b>segment_cov</b> : the number of sequenced bases in the consensus sequence divided by the typical length of this genome segment (as a percentage). The typical segment length is determined by finding the median length of the segment/subject reference sequences whose contig alignments have the highest bitscore.