This is a multi-part message in MIME format. ------=_NextPart_000_0029_01BE85ED.13547CC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable the constellation's seam is a kind of constellation's reference, it's the point where the first orbital plane and the latest orbital plane = are adjacents;and they go in contrary directions. (sorry , my english it's not good) Who Know where is the iridium seam? How can I do to calculate its position? thanks for your cooperation in my investigation Regards=20 Marcela Botero ------=_NextPart_000_0029_01BE85ED.13547CC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">