As near as I can tell, it is now on a strictly time-driven, repeating schedule lasting 1:40:48, with the analog mode starting 20 seconds into the schedule and lasting 6 minutes.
If you haven't already, download the AO-27 Scheduler program my son wrote for me from http://www.cs.rit.edu/~cjh9783/programs/satsched.php ... it's a very handy way to see at a glance what mode the bird is in, and to predict future passes when it will be in analog mode while in view of your station. I just do a side-by-side comparison of SatPC32's WinAOS output with the AO-27 Scheduler output for the next week. The calendar even lets you look ahead as far as you want (assuming the schedule or epoch data don't change in the meantime).
George, KA3HSW
----- Original Message ----- From: "Robert Bruninga" bruninga@usna.edu To: "'Howard Stephenson - K6IA'" hlstephenson@gmail.com; amsat-bb@amsat.org Sent: Thursday, January 18, 2007 8:07 AM Subject: [amsat-bb] AO-27 Schedule driver?
Regarding AO-27:
Fantastic news about AO-27. Gives us something to use at schools to demo AMSATS...
I think I have read most of the pages, but I cannot find the one thing I am looking for, and that is the top-level "rules" that are driving the new scheduling. I am not talking about code or epoc or anything like that, but simply, the human logical "rules" that tell the schedule, what to schedule...
In the past, the TEPR algorithm was very simple and could be explained as "time since entering the sun". This was easy to interpret and anyone could easily visualize or "see" what this meant realitive to his time of day, and location. Nothing needed to be consulted... Just look at the track of the satellite on the map and your relation to the terminator, and you know if it is useable..
The TOPR schedule seems to be wholy "time" driven from EPOC, but I have not been able to find what the top-level "rules" are that drive that algorithm so that I can learn to visualize it. The new on-line "schedules" are teriffic, and a good example of computer dissimination of live info, but it requires detailed consultation of printed schedules daily and having to match times with orbits, I'd rather just understand what the scheduler "intended".
Is this new schedule system still driven by the simple rule of "turning it on for X minutes after entering the sun"? Or is it a smarter rule that says "turn on over USA, Europe, Australia and Japan?" or, "turn on over those countries only while in the sun", or, turn on for 10 minutes out of every hour, or what?
So, can someone point me to this top-level "rule" that is used to drive the schedule? For routine operations, it is easier to learn the rule, than to have to look at a schedule every day...
Thanks Bob, Wb4APR
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb