[amsat-bb] Chinese Lunar sats

Tue May 22 20:26:41 UTC 2018

Scott and the other Windows users,

Windows is completely ignored.  The live Linux CD is live!  You insert it
in your DVD/CD drive and reboot your PC.  Linux will load into RAM and run
exclusively from RAM.  It has a desktop not much different from a Windows
PC or an Apple Mac.  Give it a try.  My mother started using Linux when she
was 84, and she certainly didn't have an IT background!

Larry AC8YE

On Tue, May 22, 2018 at 1:50 PM, Jean Marc Momple <
jean.marc.momple at gmail.com> wrote:

>
> Scott,
>
> Thanks and my greetings to you also.
>
> Very clear and thank you for the insights.
>
> Unfortunately I don’t have the required skills about linux and IT, in
> spite having quite a good RF knowledge (some 40 years professionally in
> SATs, Mobile, PMR, microwave and mobile up to 5G now), i just know how to
> install the APP’s o a PC and to do some basics settings…
>
> Also, my station is quite average as yours, as the Longjiang experiment is
> quite interesting will continue to watch out and try receive some signals
> from these birds. But again wish to stress that the project managers would
> have much more audience and feedback if sharing more info (basic
> marketing), just a honest comment for improvement in such future projects.
> This seems always to be the case in such HAM sat ventures, that the direct
> stakeholders are so taken with urgent matters (fully understood) that they
> fail to communicate well to get the best feedback after launch from the HAM
> community which actually would help them a lot in assessing there bird
> performance.
>
> Hope my comments will help to improve our beloved projects.
>
> 73
>
>
> Jean Marc (3B8DU)
>
>
> > On May 22, 2018, at 8:42 PM, Scott <scott23192 at gmail.com> wrote:
> >
> > Greetings!
> >
> > The software on github  (https://github.com/bg2bhc/gr-dslwp) is for use
> in GNU Radio on linux, so a Windows computer would not be helpful for that.
> >
> > In the hours after launch, several Amateurs (http://lilacsat.hit.edu.cn/
> dashboard/pages_en/contribute.html) successfully decoded the 70cm
> telemetry using those GNU Radio flowgraphs (I got some partial decodes but
> low SNR here prevented me from getting complete packets - but I was still
> very pleased!).
> >
> > Last night (U.S. time), I'm not aware of anyone receiving any of the
> 70cm telemetry.  We were asked to watch for JT4 as well, but I'm not aware
> that any was received.
> >
> > As mentioned earlier in this thread, the team has lost S-Band contact
> with one of the cubesats.  I'm not setup to receive those frequencies but
> others are watching for the signals.
> >
> > For an average station like myself, the plan will be to continue to
> watch for 70cm telemetry with the GNU Radio software & JT4 with a second
> SDR.
> >
> > Hope that helps!
> >
> > -Scott,  K4KDR
> >
> >
> > ===========================================
> >
> > -----Original Message----- From: Jean Marc Momple
> > Sent: Tuesday, May 22, 2018 12:21 PM
> > To: Nico Janssen
> > Cc: AMSAT BB
> > Subject: Re: [amsat-bb] Chinese Lunar sats
> >
> > Nico,
> >
> > I have been trying to capture the signals from the both Longjiang sats
> for the past 2 days.
> >
> > On Monday it seems that I receive a carrier on the right frequency but
> was not able to confirm that it was from Longjiang 1.
> >
> > I used the initial Keppler’s and now using Celestrac in SatPC32 which
> seems to be OK when comparing with N2YO ele/az. I have been monitoring on
> the announced FX and having also JT4G “on” for about this evening without
> any results.
> >
> > For sure I am doing something wrong but cannot figure it out due to the
> lack of information.
> >
> > Also, trying to get a decoder software for the GMSK telemetry is quite
> difficult for a non-IT geek, I don’t have clue how to have the published
> GITHUB decoder to work on my Windows computers…
> >
> > Here we are this side.
> >
> > Quite frustrating that the communication is not that good, as if the
> project team want the maximum of feedback and TLM they should provide a
> minimum of info. Just a personal opinion.
> >
> > Anyway will try hard to receive these birds as a real opportunity for
> HAM to learn more on outer space com, if anyone can help and share,
> particularly the guys who already decoded the birds, it would be more
> welcomed.
> >
> > 73
> >
> >
> >
> > Jean Marc (3B8DU)
> >
> >
> >
> >
> >
> >> On May 22, 2018, at 5:03 PM, Nico Janssen <hamsat at xs4all.nl> wrote:
> >>
> >> After their launch on 2018-05-20 at 21:28 UTC, LJ 1 and LJ 2 were
> >> maneuvered onto a track to the Moon. Several amateurs received
> >> telemetry from the satellites. But now LJ 1 appears to encounter
> >> problems.
> >>
> >> Quoting Wei BG2BHC:
> >> "Can you help to find amateurs in the US to help to monitor DSLWP-A
> >> on 435.425 and 436.425 now?
> >> We lost the contact of satellite A on S band after an orbit adjustment.
> >> We just tried to switch on UHF, but we don't know if it works or not.
> >> The sat is just above South America.
> >> If it works, 435.425 should be 500bps GMSK and JT4 alternately.
> >> 436.425 should be 250 bps GMSK.  Bothtransmit once in 5 minutes.
> >>
> >> Thank you very much!
> >>
> >> Wei"
> >>
> >> 73,
> >> Nico PA0DLO
> >>
> >> On 22-05-18 12:15, Mike Seguin wrote:
> >>> Any word on the two Chinese microsats LongJiang 1 & 2?
> >
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> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
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