Re: AO-27 lives indeed (bootloader packets captured)
Just listened to the 0035 UTC West Coast pass, the TX was on! I also checked the AO-27 web site and noted under news "TOPR schedule is now running" Congratulation's to the control...AO-27 is Back!!!
Howard Stephenson K6IA
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
The _last_ time AO-27 was running under TOPR schedule, the satellite turned on on ascending passes at roughly 30 degrees N lattitude for 360 seconds. Should be similar this time.
73, Drew KO4MA
----- Original Message ----- From: "Robert Bruninga" [email protected] To: "'Howard Stephenson - K6IA'" [email protected]; [email protected] Sent: Thursday, January 18, 2007 9:07 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 [email protected]. 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
Just followed the 15.55 - 16.09 AO-27 pass. Am I correct in saying that it is in V/U mode for half the pass and then reverts to TLM? I remember years ago working it regularly from EL96 and it used to send TLM for the first 20 seconds and then it was open to V/U.
Just wondering thats all, nice to have it back in any condition as there are precious few easy sats left!
Andrew Glasbrenner wrote:
The _last_ time AO-27 was running under TOPR schedule, the satellite turned on on ascending passes at roughly 30 degrees N lattitude for 360 seconds. Should be similar this time.
73, Drew KO4MA
----- Original Message ----- From: "Robert Bruninga" [email protected] To: "'Howard Stephenson - K6IA'" [email protected]; [email protected] Sent: Thursday, January 18, 2007 9:07 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 [email protected]. 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
Sent via [email protected]. 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
Hi David (and the list)!
Just followed the 15.55 - 16.09 AO-27 pass. Am I correct in saying that it is in V/U mode for half the pass and then reverts to TLM? I remember years ago working it regularly from EL96 and it used to send TLM for the first 20 seconds and then it was open to V/U.
Approximately half the pass, since the repeater is on for only 6 minutes at a time. Just like you remember it, you'll hear about 20 seconds of data and then the repeater is on. After 6 minutes, you'll hear another data burst as the repeater is switched off.
Looking forward to trying it again this weekend. My current work schedule is not compatible with working AO-27 passes, but it is nice to hear the reports that it is back with us. Between December 2005 and early May 2006, about half of my QSOs were on those 6-minute AO-27 passes. Fun!
73!
Patrick WD9EWK/VA7EWK - Phoenix, Arizona USA http://www.wd9ewk.net/
The _last_ time AO-27 was running under TOPR schedule, the satellite turned on on ascending passes at roughly 30 degrees N lattitude for 360 seconds. Should be similar this time.
Drew, thanks. I am reading email in reverse order, so sorry about not seeing this email first. Thanks. This gives the needed bits to infer the "rule" that is driving the schedule. That is, 1) ascending pass. 2) passing approximately 30 deg N latitude
Thanks! This is easy to see on any satellite tracking program... I wonder if it could be added to the AO-27 web page...
Bob, WB4APR
----- Original Message ----- From: "Robert Bruninga" [email protected] To: "'Howard Stephenson - K6IA'" [email protected]; [email protected] Sent: Thursday, January 18, 2007 9:07 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 [email protected]. 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
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" [email protected] To: "'Howard Stephenson - K6IA'" [email protected]; [email protected] 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 [email protected]. 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
Subject: [amsat-bb] Re: AO-27 Schedule driver?
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.
Ah, thanks. Now we are getting close. That is exactly one orbit, so they are turning it on for 6 minutes at the same "latitude" every orbit. Now, if I just understood what that target latitude is, then again, that is all anyone needs to know to always predict when AO-27 is intended to be on, without having to refer to any special programs or tools. Thanks, Bob, WB4APR
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 [email protected]. 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
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings:
participants (6)
-
Andrew Glasbrenner -
David M0ZLB -
George Henry -
Howard Stephenson - K6IA -
Patrick STODDARD (WD9EWK/VA7EWK) -
Robert Bruninga