[amsat-bb] JY1-sat dashboard

[Hasan al-Basri]

I noticed JY1SAT Dashboard is not decoding as easily as the others ...by
that I mean freq tracking. This morning I lost a bunch of frames because
the doppler is not tracking perfectly yet. Even though I was set to
autotune from 0 to 7500 Hz, as the sat freq leaked down (tones became
lower), I lost lock. When they leaked up, later in the pass, lock was not
lost.

Neither NAYAF-1 nor, FC-1 Dashboards behave that way.

BTW, the signals from JO-97 were a LOT stronger this morning. LOS was about
5 seconds early.

73, N0AN
Hasan


On Fri, Dec 7, 2018 at 6:17 PM Kevin <wa7fwf at gmail.com> wrote:

> Hi Hasan,
>     I first noticed this on my original lash up of
> airspy>sdr#>vbcable>dashboard and I was manually tuning and as doppler
> marched the signal through the passband  I learned that moving it back
> up too quickly would lose lock and seemed to have trouble re-locking, so
> I ignored this as being on my end and manual tuning.
>    I now have it running on a funcube dongle and still see it, I'm still
> getting a feel for the real downlink and doppler swings so my range may
> be set a little wide, I will try closing it in and see if that helps.
>
> Thanks
> Kevin
>
>
>
> On 12/7/2018 12:44 PM, Hasan al-Basri wrote:
> > Hi Kevin,
> > I did a TLM run with JY1SAT about 90 min ago and left the decoder running
> > (as I do with all my TLM programs)
> > AOS in about 9 minutes here, and assuming the TLM is on, I'll let you
> know
> > if JY1 Dashboard takes off or not.
> >
> > 17:19z , JY1SAT came right up, and it Dashboard is locked and decoding
> > fine. I have about 11 frames and am at 9 deg EL.
> >
> > Just for comparison purposes, I have my AutoTune range enabled, and set
> for
> > 0 and 3500
> > 73, N0AN
> >
> > Also, the signal has been considerably weaker and with a lot more QSB
> than
> > I see on either AO-73 or EO-88. I'm seeing a LOT of polarization fading
> as
> > I switch back and forth between a RHC Eggbeater and an X200 Colllnear.
> Even
> > at 40 deg EL, seeing polarization fading on the RHC EB.
> >
> > Also noted, doppler tracking is not as "perfect" as it i s on AO-73 and
> > EO-88. I assume this is due to some slight error in the TLE's
> >
> > I also just adjusted my tracking Auto-Tune high end to 6000, as it lost
> > some decodes with the high end set to 3500
> >
> > Hasan
> >
> >
> > On Fri, Dec 7, 2018 at 9:39 AM christy hunter <cchunter3 at mindspring.com>
> > wrote:
> >
> >> Kevin,
> >>
> >> Yes,  I was also running simultaneously the telem software latest
> version.
> >>
> >> 73 Christy KB6LTY
> >>
> >>
> >>
> >> *Kevin* wa7fwf at gmail.com
> >> <mailto:amsat-bb%40amsat.org
> >>
> ?Subject=Re%3A%20%5Bamsat-bb%5D%20JY1-sat%20dashboard&In-Reply-To=%3Ce3eb2ee8-a2ef-097a-c556-1ff77b689b2f%
> >> 40gmail.com%3E>
> >> /Fri Dec 7 07:41:06 UTC 2018/
> >>
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> >>
> >>
> >> ------------------------------------------------------------------------
> >>
> >> Hi All,
> >>       Is anyone else noticing any  issues with the JY1-sat dashboard? I
> >> can start it with the sat present and it will instantly lock and track,
> >> next pass it will ignore the signal, kill it and restart it and bam
> >> instant lock.
> >>
> >>     73 Kevin WA7FWF
> >>
> >> ------------------------------------------------------------------------
> >>
> >>
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