TLEs – Line Number

This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here.

Line Number

Did you really need detail on this one?

This is the line number of the data. As the data is supplied in two lines, this value can either be 1 or 2. The title line (in three line sets) does not have a line number.

Examples:

1
2

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