(amsat-bb より転載)
Roscosmos has announced the ISS will be reboosted 3.7 km tomorrow.
Since the orbital period changes _roughly_ 1.2 seconds for each 1 km
of altitude, we should see almost 5 seconds of change. Usual caveats
about tracking program ISS discrepancies until the Keps catch up.
http://www.federalspace.ru/main.php?id=2&nid=11541&lang=en
Alan, WA4SCA