Just reading up on EO-79, trying to understand it. The Amsat website says: "The transponder will commence operation 27 minutes after the spacecraft enters sunlight and will stay on for a period of 25 minutes."
I take that to mean that the transponder will stay ON for 25 minutes regardless of whether the satellite is in sunlight or darkness during that 25 minute period. Is that correct?
I also read: "This schedule may be modified over the forthcoming weeks as a result of experience."
Have there been any changes to the schedule?
73 and many thanks in advance!
Ken Alexander VE3HLS
Hi Ken. You are correct.
Exits eclipse into sunlight with transponder off. counts 27 minutes -This is over Antarctica and the southern Ocean, so not many users. - Battery charging. Switches on transponder. After 25 minutes of transponder operation it switches off. Then it has a short period in sunlight to add a little charge to the battery Enters next eclipse.
Since implementing this schedule it has not been modified. We continue to monitor the orbit / the coverage area of the satellite and the power budget as the seasons change.
So far.....so good.
73
David G0MRF
-----Original Message----- From: Ken Alexander k.alexander@rogers.com To: amsat-bb amsat-bb@amsat.org Sent: Thu, 23 Mar 2017 16:38 Subject: [amsat-bb] EO-79
Just reading up on EO-79, trying to understand it. The Amsat website says: "The transponder will commence operation 27 minutes after the spacecraft enters sunlight and will stay on for a period of 25 minutes."
I take that to mean that the transponder will stay ON for 25 minutes regardless of whether the satellite is in sunlight or darkness during that 25 minute period. Is that correct?
I also read: "This schedule may be modified over the forthcoming weeks as a result of experience."
Have there been any changes to the schedule?
73 and many thanks in advance!
Ken Alexander VE3HLS
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Thanks David,
I'll keep this in mind and give it a try this weekend!
73,
Ken Alexander VE3HLS
On 2017-03-23 12:53 PM, David G0MRF wrote:
Hi Ken. You are correct.
Exits eclipse into sunlight with transponder off. counts 27 minutes -This is over Antarctica and the southern Ocean, so not many users. - Battery charging. Switches on transponder. After 25 minutes of transponder operation it switches off. Then it has a short period in sunlight to add a little charge to the battery Enters next eclipse.
Since implementing this schedule it has not been modified. We continue to monitor the orbit / the coverage area of the satellite and the power budget as the seasons change.
So far.....so good.
73
David G0MRF
-----Original Message----- From: Ken Alexander k.alexander@rogers.com To: amsat-bb amsat-bb@amsat.org Sent: Thu, 23 Mar 2017 16:38 Subject: [amsat-bb] EO-79
Just reading up on EO-79, trying to understand it. The Amsat website says: "The transponder will commence operation 27 minutes after the spacecraft enters sunlight and will stay on for a period of 25 minutes."
I take that to mean that the transponder will stay ON for 25 minutes regardless of whether the satellite is in sunlight or darkness during that 25 minute period. Is that correct?
I also read: "This schedule may be modified over the forthcoming weeks as a result of experience."
Have there been any changes to the schedule?
73 and many thanks in advance!
Ken Alexander VE3HLS
Sent via AMSAT-BB@amsat.org mailto:BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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