Re: [amsat-bb] PSAT Elements are 6 minutes early (Which satellite?)
Was PSK TLLM channel on 315 Hz or 375 Hz? Were you also hearing PSAT 1200 baud packets on 145.825 at same time?
AL0I suggests some of us might be hearing BRICsat (TLM on 375 Hz) While others (me) are hearing PSAT (TLM on 315 Hz) simultaneouisely with PSAT packets on 145.825
Bob
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ken Swaggart Sent: Saturday, May 23, 2015 12:13 PM To: AMSAT BB Subject: Re: [amsat-bb] PSAT Elements are 6 minutes early
The keps certainly look good here in Oregon. I had a predicted PSAT AOS out over the Pacific Ocean at 16:02:01Z and picked up the first PSK-31 beacon at 16:02:16Z.
Ken, W7KKE
-----Original Message----- From: Robert Bruninga Sent: Saturday, May 23, 2015 07:51 To: AMSAT BB Subject: Re: [amsat-bb] PSAT Elements are 6 minutes early
Today, (over USA) I am finding satellite to be 8.5 minutes behind the ULTRAsat3 TLE. And get a very good match. I am listening to the PSK31 *FM* downlink on 435.350 +/- 5 KHz and swinging the beam and watching Doppler to confirm I am tracking well.
But Nico (below) sees it on time in Europe. I cannot explain the difference... I am using the elements with an EPOC of 15 140.6701389 (shown below) which were released at separation. There have been no updates yet. As soon as I get them I will post them.
I did just turn on 3 USA and 3 European packet bulletins. And adjusted the MA spacecraft counter so that the right bulletins will come on over the right continents. DIGI will remain off since PSK31 is working so well!
Bob, Wb4APR -----Original Message----- From: Nico Janssen Sent: Saturday, May 23, 2015 10:24 AM
Yesterday and today I performed detailed doppler measurements on high PSAT passes, both on 70 cm and on 2 m. I found that yesterday the satellite was 10 seconds early and today 14 seconds early, compared to the ULTRASat3 TLE set.
I wonder why you think it is 6 minutes late. Maybe you were confused by the ASCII telemetry transmissions on 145.826 MHz of UoSAT-OSCAR 11, which passed about 6 minutes after PSAT?
73, Nico PA0DLO
On 2015-05-22 20:21, Robert Bruninga wrote:
I am finding that PSAT is 6 MINUTES behind the predictions of the previously provided original Launch TLE :
ULTRASat3 1 99993U 15140.67013889 .00040043 00000-0 10235-2 0 00009 2 99993 055.0004 339.9238 0251027 182.3314 074.3075 15.12517086000014
So until I get new ones. Just point at AOS and wait 6 miuntes.
Also, I had said not to TX PSK31 on the 10m u plink until you heard the downlink. Well, that was dumb advise, because the transponder does not come up unless it hears PSK31!
So the new rule is, Listen first. If not heard, TX anyway. If not heard then, Fix your problem, and try again?
We don’t know how the power budget will work out. So all we can do is watch.
Bob, WB4APR _______________________________________________ Sent via [email protected]. 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
_______________________________________________ Sent via [email protected]. 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
_______________________________________________ Sent via [email protected]. 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
For the 17:41Z pass - First packet seen, but not decoded, at 17:42. PSK-31 was at 311 Hz. Partial PSK decodes: B 022 25 22 803 248 +4 23 825 242 +1 W3ADO-r beacon B 024 00 23 860 241 +0 – t
Ken
-----Original Message----- From: Robert Bruninga Sent: Saturday, May 23, 2015 10:36 To: AMSAT BB Subject: Re: [amsat-bb] PSAT Elements are 6 minutes early (Which satellite?)
Was PSK TLLM channel on 315 Hz or 375 Hz? Were you also hearing PSAT 1200 baud packets on 145.825 at same time?
AL0I suggests some of us might be hearing BRICsat (TLM on 375 Hz) While others (me) are hearing PSAT (TLM on 315 Hz) simultaneouisely with PSAT packets on 145.825
Bob
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ken Swaggart Sent: Saturday, May 23, 2015 12:13 PM To: AMSAT BB Subject: Re: [amsat-bb] PSAT Elements are 6 minutes early
The keps certainly look good here in Oregon. I had a predicted PSAT AOS out over the Pacific Ocean at 16:02:01Z and picked up the first PSK-31 beacon at 16:02:16Z.
Ken, W7KKE
-----Original Message----- From: Robert Bruninga Sent: Saturday, May 23, 2015 07:51 To: AMSAT BB Subject: Re: [amsat-bb] PSAT Elements are 6 minutes early
Today, (over USA) I am finding satellite to be 8.5 minutes behind the ULTRAsat3 TLE. And get a very good match. I am listening to the PSK31 *FM* downlink on 435.350 +/- 5 KHz and swinging the beam and watching Doppler to confirm I am tracking well.
But Nico (below) sees it on time in Europe. I cannot explain the difference... I am using the elements with an EPOC of 15 140.6701389 (shown below) which were released at separation. There have been no updates yet. As soon as I get them I will post them.
I did just turn on 3 USA and 3 European packet bulletins. And adjusted the MA spacecraft counter so that the right bulletins will come on over the right continents. DIGI will remain off since PSK31 is working so well!
Bob, Wb4APR -----Original Message----- From: Nico Janssen Sent: Saturday, May 23, 2015 10:24 AM
Yesterday and today I performed detailed doppler measurements on high PSAT passes, both on 70 cm and on 2 m. I found that yesterday the satellite was 10 seconds early and today 14 seconds early, compared to the ULTRASat3 TLE set.
I wonder why you think it is 6 minutes late. Maybe you were confused by the ASCII telemetry transmissions on 145.826 MHz of UoSAT-OSCAR 11, which passed about 6 minutes after PSAT?
73, Nico PA0DLO
On 2015-05-22 20:21, Robert Bruninga wrote:
I am finding that PSAT is 6 MINUTES behind the predictions of the previously provided original Launch TLE :
ULTRASat3 1 99993U 15140.67013889 .00040043 00000-0 10235-2 0 00009 2 99993 055.0004 339.9238 0251027 182.3314 074.3075 15.12517086000014
So until I get new ones. Just point at AOS and wait 6 miuntes.
Also, I had said not to TX PSK31 on the 10m u plink until you heard the downlink. Well, that was dumb advise, because the transponder does not come up unless it hears PSK31!
So the new rule is, Listen first. If not heard, TX anyway. If not heard then, Fix your problem, and try again?
We don’t know how the power budget will work out. So all we can do is watch.
Bob, WB4APR _______________________________________________ Sent via [email protected]. 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
_______________________________________________ Sent via [email protected]. 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
_______________________________________________ Sent via [email protected]. 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 _______________________________________________ Sent via [email protected]. 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
participants (2)
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Ken Swaggart -
Robert Bruninga