[amsat-bb] Chinese Lunar sats

[Scott]

Very good point, Larry.  Thanks for mentioning that.

Before I had a computer dedicated to linux-only, on numerous past projects
that required GNU Radio I used a bootable CD and it works great.  Your base
operating system is untouched.

There are performance advantages to having linux installed on a dedicated
computer, but to learn what linux & GNU Radio is about, the bootable CD is
a great option.

-Scott,  K4KDR


=======================



On Tue, May 22, 2018 at 4:26 PM, Larry Howell <larry.howell.47 at gmail.com>
wrote:

> 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?
>>
>