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CX2SA > SATDIG 25.05.18 18:52l 907 Lines 29660 Bytes #999 (0) @ WW
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Sent: 180525/1630Z @:CX2SA.SAL.URY.SOAM #:43456 [Salto] FBB7.00e $:AMSATBB13176
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Trouble with LOTW? (skristof@???????.????
2. Maidenhead Grid EL58hx Activation Memorial Day Weekend 2018 -
Rescheduled (Clayton Coleman W5PFG)
3. The VE3HLS Grand Finale Rove! (Ken Alexander)
4. Re: Chinese Lunar sats (Jean Marc Momple)
5. Upcoming ARISS Contact Schedule as of 2018-05-24 06:00 UTC
(aj9n@???.????
6. Re: Trouble with LOTW? (skristof@???????.????
7. User error on Falconsat-3 (Ryan Noguchi)
8. AO73 operations (Graham Shirville)
9. Fw: Athenoxat-1 beacon puzzles round 4 (Roland Zurmely)
10. LongJiang 1 & 2 arrive at the Moon (Nico Janssen)
11. Re: LongJiang 1 & 2 arrive at the Moon (Nico Janssen)
12. Re: LongJiang 1 & 2 arrive at the Moon (Jordan Trewitt)
13. Re: LongJiang 1 & 2 arrive at the Moon (Nico Janssen)
----------------------------------------------------------------------
Message: 1
Date: Wed, 23 May 2018 20:11:50 -0400
From: skristof@???????.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Trouble with LOTW?
Message-ID: <fa38c1d82faa5fd4a0a833859522aa9b@???????.???>
Content-Type: text/plain; charset=US-ASCII
Anybody else having trouble getting a file to upload to Logbook of the
World today? I'm trying to load in some SO-50 QSOs from yesterday and
it's not processing them. I use TQSL and don't usually have a problem.
If I contacted you on SO-50 yesterday and you're waiting for me to
confirm on LOTW, hang in there. I'm trying.
Steve AI9IN
------------------------------
Message: 2
Date: Wed, 23 May 2018 20:40:06 -0500
From: Clayton Coleman W5PFG <tasmac@?????.??>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] Maidenhead Grid EL58hx Activation Memorial Day
Weekend 2018 - Rescheduled
Message-ID: <e091eddd-6a15-1709-168f-a7ebac9286e0@?????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
(Venice, LA, USA) Wyatt Dirks, AC0RA, and Clayton Coleman, W5PFG?s plan
to activate maidenhead gridsquare EL58hx on Memorial Day weekend, 2018,
is rescheduled due to unsafe weather conditions. The National Weather
Service?s National Hurricane Center confirms 70% potential for a
tropical depression to form in the next five days with potential to move
into the Gulf of Mexico this weekend. Rainfall predicted to hit the
Louisiana coast combined with additional moisture from the potential
depression would inhibit safe access to the operating location. The new
dates for the expedition are June 7-9, 2018.
------------------------------
Message: 3
Date: Thu, 24 May 2018 02:20:12 +0000 (UTC)
From: Ken Alexander <k.alexander@??????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] The VE3HLS Grand Finale Rove!
Message-ID: <808281768.4797585.1527128412561@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Get out your highlighter and circle June 15th, 16th and 17th on your
calendars!? You don't want to miss The VE3HLS Grand Finale Rove!? This will
be my final significant rove before I retire from satellite ops and get down
to planning the next chapter of my life as I prepare to retire in Thailand.??
I will follow the St. Lawrence Seaway down from Lake Ontario to the Gulf of
St. Lawrence, activating FN14, FN15, FN24/25, FN35/36, FN46/47, FN57/58 and
FN59/69 along the way down and back.
As always, the inspiration for the rove is a result of a few of you posting
your grids QSLed maps to Twitter.? I read them and base future roves on the
gaps I see in your maps.
I'll work out a basic schedule over the next week or two and post it here
and on Twitter.
73,
KenVE3HLS
------------------------------
Message: 4
Date: Wed, 23 May 2018 23:49:37 +0400
From: Jean Marc Momple <jean.marc.momple@?????.???>
To: "Edson W. R. Pereira" <ewpereira@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Chinese Lunar sats
Message-ID: <C281289D-9AB3-42AE-B2C5-5BBFCF5E35D1@?????.???>
Content-Type: text/plain; charset=utf-8
Edson,
Thanks for the info.
I have a 18 ele yagi therefore hopefully will be able to catch the birds
eventually, worse case with FT4.
Thanks again, it helps to try and experiment.
73
Jean Marc (3B8DU)
> On May 23, 2018, at 10:46 PM, Edson W. R. Pereira <ewpereira@?????.???>
wrote:
>
>
> Jean Marc,
>
> I've used a home-made 4-el LFA tuned for 436.5 MHz. It is the one in
Figure-3 in this article:
>
> http://amsat-br.org/cubesat-serpens-decodificacao-dos-sinais/
<http://amsat-br.org/cubesat-serpens-decodificacao-dos-sinais/>
>
> The preamp used was an ARR SP432VDG (not the one shown in the picture).
The RX hardware was a Nooelec NESDR Smart (RTL-SDR).
>
> 73, Edson PY2SDR
>
>
> On Wed, May 23, 2018 at 3:31 PM, Jean Marc Momple
<jean.marc.momple@?????.??? <mailto:jean.marc.momple@?????.???>> wrote:
> Edson,
>
> My congratulations (and for sure from the the community) for achieving the
reception of the Longjiang and decoding the telemetry.
>
> I would be grateful if you could let me know what antenna you have been
using so far (up to 64K km) just for my learning.
>
> 73
>
>
> Jean Marc (3B8DU)
>
>> On May 22, 2018, at 8:38 PM, Edson W. R. Pereira <ewpereira@?????.???
<mailto:ewpereira@?????.???>> wrote:
>>
>>
>> Jean,
>>
>> I suggest usign the live Ubuntu ISO image with gnuradio and the necessary
OOT modules for monitoring the GMSK signals. While installing gnuradio and
the OOT modules manually can be done, it takes some effort. Running the live
image is much easier. You do need a fast computer with at least four CPU
cores to be able to run all the flowgraphs.
>>
>> I had some difficulties with the doppler correction in my setup during
the first pass. The predictions seemed off and I had to manually adjust the
frequency offset to get the signals into the demodulators' passbands. Once
that was done, I could decode the GMSK telemetry from both satellites up to
64000 km. Above 64000 km, my small antenna was no longer enough. I will get
a better antenna ready and will try monitoring again over the weekend.
>>
>> 73, Edson PY2SDR
>>
>>
>>
>>
>> On Tue, May 22, 2018 at 1:21 PM, Jean Marc Momple
<jean.marc.momple@?????.??? <mailto:jean.marc.momple@?????.???>> wrote:
>> 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@??????.??
<mailto:hamsat@??????.??>> 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?
>> >>
>> >
>> > _______________________________________________
>> > Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. 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
<http://www.amsat.org/mailman/listinfo/amsat-bb>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. 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
<http://www.amsat.org/mailman/listinfo/amsat-bb>
>>
>
>
------------------------------
Message: 5
Date: Thu, 24 May 2018 01:30:17 -0400
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2018-05-24
06:00 UTC
Message-ID: <16390a056e7-c94-1145@?????????????.???.???????.???>
Content-Type: text/plain; charset=utf-8
Upcoming ARISS Contact Schedule as of 2018-05-24 06:00 UTC
Quick list of scheduled contacts and events:
?
Janusz Kusoci?ski Primary School No. 71, Pozna?, Poland, telebridge via W6SRJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Ricky Arnold KE5DAU
Contact was successful: Wed 2018-05-23 11:06:52 UTC 66 deg (***)
?
Sterrenschool De Globetrotter, Rotterdam, The Netherlands, telebridge via
VK4KHZ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Ricky Arnold KE5DAU
Contact is a go for: Thu 2018-05-31 16:58:36 UTC 40 deg
******************************************************************************
ARISS is always glad to receive listener reports for the above contacts.?
ARISS thanks everyone in advance for their assistance.? Feel free to send
your reports to aj9n@?????.??? or aj9n@???.???.
?
Listen for the ISS on the downlink of 145.8? MHz.
?
******************************************************************************
*
?
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
?
******************************************************************************
*
Several?of you have sent me emails asking about the RAC ARISS website and
not being able?to get in.? That has now been changed to?
http://www.ariss.org/
Note that there are links to other ARISS websites from this?site.
****************************************************************************
Looking?for something new to do?? How about receiving DATV from the ISS???
If interested, then please go to the ARISS-EU website for complete?
details.? Look for the buttons indicating Ham?Video.? ? ? ? ? ? ? ? ? ? ? ?
? ?
? ? ? ? ? ? ? ? ? ? ?
http://www.ariss-eu.org/? ?
?
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to
provide some insight.? Contact Kerry at kbanke@?????????.???
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:?
Francesco IK?WGF with 132
Satoshi 7M3TJZ with 129
Gaston ON4WF with 123
Sergey RV3DR with 103
****************************************************************************
The?webpages listed below were all reviewed for accuracy.? Out of date
webpages?were removed and new ones have been added.? If there are additional
ARISS?websites I need to know about, please let me know.
Note, all times?are approximate.? It is recommended that you do your own
orbital prediction?or start listening about 10 minutes before the listed
time.
All dates and?times listed follow International Standard ISO 8601 date and
time format? YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of?2018-05-24 06:00 UTC.? (***)
Here you will find a listing of all scheduled?school contacts, and
questions, other ISS related websites, IRLP and?Echolink websites, and
instructions for any contact that may be streamed?live.??
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
http://www.amsat.org/amsat/ariss/news/arissnews.txt
Total number?of ARISS ISS to earth school events is 1230. ??(***)
Each school counts as 1?event.
Total number of ARISS ISS to earth school contacts is 1178. (***)
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is?47.
A complete year by year breakdown of the contacts may be found in the
file.
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
Please?feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The?following US states and entities have never had an ARISS contact:
Delaware, South Dakota, Wyoming, American?Samoa, Guam, Northern Marianas
Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL?information may be found at:??
http://www.ariss.org/qsl-cards.html?
ISS callsigns:? DP?ISS, IR?ISS, NA1SS, OR4ISS,?RS?ISS
****************************************************************************
The successful school list has been updated as of 2018-05-24 06:00 UTC. (***)
http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
Frequency? chart for packet, voice, and crossband repeater modes showing
Doppler? correction? as of 2005-07-29 04:00 UTC
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction
.rtf
Listing?of ARISS related magazine articles as of 2006-07-10 03:30 UTC.
http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf
Check out the Zoho reports of the ARISS?contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 54 on orbit
Scott Tingle KG5NZA
Norishige Kanai
Anton Shkaplerov
?
Exp. 55 on orbit
Drew Feustel
Oleg Artemyev
Ricky Arnold KE5DAU
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
------------------------------
Message: 6
Date: Thu, 24 May 2018 06:55:50 -0400
From: skristof@???????.???
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Trouble with LOTW?
Message-ID: <dafaa9bb0c8a2a0652eb6ec9bc9663cc@???????.???>
Content-Type: text/plain; charset=US-ASCII
As usual, it was operator error. Always be sure that you are entering
the correct year in the date box when using TQSL.
Now, I need to figure out why I didn't hear anyone on SO-50 this
morning.
Steve AI9IN
On 2018-05-23 20:11, skristof@???????.??? wrote:
> Anybody else having trouble getting a file to upload to Logbook of the
> World today? I'm trying to load in some SO-50 QSOs from yesterday and
> it's not processing them. I use TQSL and don't usually have a problem.
>
> If I contacted you on SO-50 yesterday and you're waiting for me to
> confirm on LOTW, hang in there. I'm trying.
>
> Steve AI9IN
> _______________________________________________
------------------------------
Message: 7
Date: Fri, 25 May 2018 03:56:11 +0000 (UTC)
From: Ryan Noguchi <ai6do@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] User error on Falconsat-3
Message-ID: <220869631.1477543.1527220571371@????.?????.???>
Content-Type: text/plain; charset=UTF-8
If you tried to message me by APRS on FS-3 over the past month or so and
received no response, it's because?I managed to screw up when programming my
TH-D72A memory channels for Falconsat-3. The first channel (AOS and rising)
was fine, but the rest were totally messed up. As a result, I couldn't
decode any packets for the last two-thirds of each pass. I have the channels
configured properly now, so please try again next time!
73, Ryan AI6DO
------------------------------
Message: 8
Date: Fri, 25 May 2018 12:39:09 +0100
From: Graham Shirville <g.shirville@??????????.???>
To: AMSAT <amsat-bb@?????.???>, "funcube@???????????.??.???
<funcube@???????????.??.??>
Subject: [amsat-bb] AO73 operations
Message-ID: <cd238086-a0f1-a822-ff91-7ccb2cf33e2c@??????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi All,
Just to confirm that AO73/FUNcube-1 is now in continuous amateur
transponder mode for the weekend.
As we have another long weekend, you can expect the autonomous mode,
with high power telemetry only in sunlight, to recommence either late
Monday or first thing Tuesday (UTC)
best 73
Graham
G3VZV
------------------------------
Message: 9
Date: Fri, 25 May 2018 11:59:52 +0000 (UTC)
From: Roland Zurmely <py4zbz@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Fw: Athenoxat-1 beacon puzzles round 4
Message-ID: <1805331297.1103263.1527249592904@????.?????.???>
Content-Type: text/plain; charset=UTF-8
----- Forwarded Message ----- From: Yesie Brama
<yesie.l.brama@???????????.???>To: Microspace
<athenoxat@???????????.???>Sent: Friday, May 25, 2018, 6:51:32 AM
GMT-3Subject: Athenoxat-1 beacon puzzles round 4
Dear friends,
It's been a while and hope this email finds you well. We'd like to inform
that we've just enabled the new round of Athenoxat-1 beacon puzzles.
Beacon puzzles is the regular data beacon from Athenoxat-1 with specific
type 3.
It contains 10 frames per burst every minute (30sec interval alternating
with Morse CW).
It has a slight difference from the previous rounds and therefore we
consider this experience as part of the in-orbit test. Hopefully it'll go
smoothly.
The kss files containing the frames can be submitted through the usual
address athenoxat@???????????.???
Any number of frames are very useful for reconstructing the images. Thus
we're hoping that stations with low elevation passes will still be able to
participate.
Our website will be updated daily and can be viewed here:
http://www.micro-space.org/ham.html
For the stations around our control station (in Singapore), please keep
tuning in as the satellite stays beaconing although it may seem appear busy
in comm.operation.
The only apparent change is that you may not hear the Morse CW once our
comm.operation starts.
Please let us know if you need any clarifications or help in setting up some
software for receiving Athenoxat-1 packets.
Please feel free to inform others who may be interested and able to listen
to Athenoxat-1.
We are looking forward to your kss files then.
Thank you in advance for listening, and have a good weekend.
73 de Athenoxat-1 team(Yesie 9V1SQ)
| | Virus-free. www.avg.com |
------------------------------
Message: 10
Date: Fri, 25 May 2018 15:21:05 +0200
From: Nico Janssen <hamsat@??????.??>
To: AMSAT -BB <amsat-bb@?????.???>
Subject: [amsat-bb] LongJiang 1 & 2 arrive at the Moon
Message-ID: <6e7638f4-4fe5-9308-753c-d79c420f57dd@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
The Chinese microsats LongJiang 1 & 2 have arrived at the Moon.
On 2018-05-25 between 14:00 and 15:00 UTC they are expected to pass
the Moon at a distance of about 300 km. At that time they should
perform a braking maneuver so that they can enter a high elliptical
300 x 9000 km orbit around the Moon. The planned orbit inclination
is unknown.
Unfortunately there is virtually no information on these satellites
coming from China. It is not clear if LJ 1 is recovered. Telemetry is
being received from the S band downlink of LJ 2 at 2275.22 MHz.
All other information, including recent orbital data, is missing.
Note that the usual satellite tracking programs and regular TLE
data can not be used for tracking satellites near the Moon. You
really need specific deep space tracking software and orbital
elements. TLE sets for the LongJiangs that were published earlier
have no value at all now that these satellites are in the vicinity of
the Moon. Again I would like to refer to my web page on this
subject:
https://hamsat1.home.xs4all.nl/index.html
73,
Nico PA0DLO
------------------------------
Message: 11
Date: Fri, 25 May 2018 15:53:29 +0200
From: Nico Janssen <hamsat@??????.??>
To: Jordan Trewitt <jmtrewitt@?????.???>
Cc: AMSAT -BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] LongJiang 1 & 2 arrive at the Moon
Message-ID: <d0b6563a-5012-ad8c-9e6c-c6730765b8ee@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
Jordan,
Yes, you should see a sudden change in the doppler curve. And that
would be a welcome confirmation of a successful maneuver.
If you also can receive the LJ 1 S band downlink it would be extra
interesting to see what happens to that signal.
73, Nico
On 25-05-18 15:47, Jordan Trewitt wrote:
> If we have our S band antennas pointed up there, shouldn't we be able
> to see the braking maneuver with the Doppler shift? Assuming the moon
> (or Earth) doesn't block the signals.
> -Jordan
> KF5COQ
>
> On Fri, May 25, 2018 at 8:22 AM Nico Janssen <hamsat@??????.??
> <mailto:hamsat@??????.??>> wrote:
>
>
> The Chinese microsats LongJiang 1 & 2 have arrived at the Moon.
> On 2018-05-25 between 14:00 and 15:00 UTC they are expected to pass
> the Moon at a distance of about 300 km. At that time they should
> perform a braking maneuver so that they can enter a high elliptical
> 300 x 9000 km orbit around the Moon. The planned orbit inclination
> is unknown.
>
> Unfortunately there is virtually no information on these satellites
> coming from China. It is not clear if LJ 1 is recovered. Telemetry is
> being received from the S band downlink of LJ 2 at 2275.22 MHz.
> All other information, including recent orbital data, is missing.
>
> Note that the usual satellite tracking programs and regular TLE
> data can not be used for tracking satellites near the Moon. You
> really need specific deep space tracking software and orbital
> elements. TLE sets for the LongJiangs that were published earlier
> have no value at all now that these satellites are in the vicinity of
> the Moon. Again I would like to refer to my web page on this
> subject:
> https://hamsat1.home.xs4all.nl/index.html
>
> 73,
> Nico PA0DLO
>
> _______________________________________________
> Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. 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
>
------------------------------
Message: 12
Date: Fri, 25 May 2018 08:47:16 -0500
From: Jordan Trewitt <jmtrewitt@?????.???>
To: Nico Janssen <hamsat@??????.??>
Cc: AMSAT -BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] LongJiang 1 & 2 arrive at the Moon
Message-ID:
<CAHD9BgCF=tmm8-g0gdnd2Jxh8vv3tDsmKRPDKxPF2ci1Ucv7Bg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
If we have our S band antennas pointed up there, shouldn't we be able to
see the braking maneuver with the Doppler shift? Assuming the moon (or
Earth) doesn't block the signals.
-Jordan
KF5COQ
On Fri, May 25, 2018 at 8:22 AM Nico Janssen <hamsat@??????.??> wrote:
>
> The Chinese microsats LongJiang 1 & 2 have arrived at the Moon.
> On 2018-05-25 between 14:00 and 15:00 UTC they are expected to pass
> the Moon at a distance of about 300 km. At that time they should
> perform a braking maneuver so that they can enter a high elliptical
> 300 x 9000 km orbit around the Moon. The planned orbit inclination
> is unknown.
>
> Unfortunately there is virtually no information on these satellites
> coming from China. It is not clear if LJ 1 is recovered. Telemetry is
> being received from the S band downlink of LJ 2 at 2275.22 MHz.
> All other information, including recent orbital data, is missing.
>
> Note that the usual satellite tracking programs and regular TLE
> data can not be used for tracking satellites near the Moon. You
> really need specific deep space tracking software and orbital
> elements. TLE sets for the LongJiangs that were published earlier
> have no value at all now that these satellites are in the vicinity of
> the Moon. Again I would like to refer to my web page on this
> subject:
> https://hamsat1.home.xs4all.nl/index.html
>
> 73,
> Nico PA0DLO
>
> _______________________________________________
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> to all interested persons worldwide without requiring membership. Opinions
> expressed
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> AMSAT-NA.
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------------------------------
Message: 13
Date: Fri, 25 May 2018 18:25:21 +0200
From: Nico Janssen <hamsat@??????.??>
To: Jordan Trewitt <jmtrewitt@?????.???>, AMSAT -BB
<amsat-bb@?????.???>
Subject: Re: [amsat-bb] LongJiang 1 & 2 arrive at the Moon
Message-ID: <0e7a06c3-28df-0a01-63aa-9b36f2085fdb@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
It is confirmed from China that LongJiang 2 has performed a
successful braking maneuver, so that it is now in lunar orbit.
No further details yet.
73, Nico
On 25-05-18 15:53, Nico Janssen wrote:
> Jordan,
>
> Yes, you should see a sudden change in the doppler curve. And that
> would be a welcome confirmation of a successful maneuver.
>
> If you also can receive the LJ 1 S band downlink it would be extra
> interesting to see what happens to that signal.
>
> 73, Nico
>
> On 25-05-18 15:47, Jordan Trewitt wrote:
>> If we have our S band antennas pointed up there, shouldn't we be able
>> to see the braking maneuver with the Doppler shift? Assuming the moon
>> (or Earth) doesn't block the signals.
>> -Jordan
>> KF5COQ
>>
>> On Fri, May 25, 2018 at 8:22 AM Nico Janssen <hamsat@??????.??
>> <mailto:hamsat@??????.??>> wrote:
>>
>>
>> ??? The Chinese microsats LongJiang 1 & 2 have arrived at the Moon.
>> ??? On 2018-05-25 between 14:00 and 15:00 UTC they are expected to pass
>> ??? the Moon at a distance of about 300 km. At that time they should
>> ??? perform a braking maneuver so that they can enter a high elliptical
>> ??? 300 x 9000 km orbit around the Moon. The planned orbit inclination
>> ??? is unknown.
>>
>> ??? Unfortunately there is virtually no information on these satellites
>> ??? coming from China. It is not clear if LJ 1 is recovered.
>> Telemetry is
>> ??? being received from the S band downlink of LJ 2 at 2275.22 MHz.
>> ??? All other information, including recent orbital data, is missing.
>>
>> ??? Note that the usual satellite tracking programs and regular TLE
>> ??? data can not be used for tracking satellites near the Moon. You
>> ??? really need specific deep space tracking software and orbital
>> ??? elements. TLE sets for the LongJiangs that were published earlier
>> ??? have no value at all now that these satellites are in the
>> vicinity of
>> ??? the Moon. Again I would like to refer to my web page on this
>> ??? subject:
>> ??? https://hamsat1.home.xs4all.nl/index.html
>>
>> ??? 73,
>> ??? Nico PA0DLO
>>
>> ??? _______________________________________________
>> ??? Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. 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 AMSAT-BB@?????.???. 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
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
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 member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
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End of AMSAT-BB Digest, Vol 13, Issue 176
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