Re: [amsat-bb] when are TLE's too old to use?

???? Clint, I have been working satellites since Oscar 6, when I was in high school. Worked STS-9 (Owen Garriott, Spacehab-1) when I was in graduate college.

No need for education or evangelizing. 73.

greg, w9gb AMSAT-NA, AMSAT-UK Sent from iPad Air

On May 17, 2018, at 8:43 PM, Clint Bradford clintbrad4d@earthlink.net wrote:

If you are working the ISS (fruitless right now), I would update every week, because they re-position themselves a couple times a month. NOTHING drastic, but that is where the slight difference is from week-to-week.

And since you’re updating already, snag ‘em all (grin).

If not working the ISS - every couple weeks or up to a month is fine.

Clint K6LCS http://www.work-sat.com 909-999-SATS