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CX2SA > SATDIG 17.06.17 12:06l 767 Lines 25522 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. CAS4A CAS4B SDR recordings? (Douglas Quagliana)
2. CAS-4A and CAS-4B (ingejack@xxx.xxxx
3. Re: CAS4A CAS4B SDR recordings? (Jean-Pierre Godet)
4. Re: IC-821H problems (Matthew Stevens)
5. Re: CAS4A CAS4B SDR recordings? (Jean-Pierre Godet)
6. LilacSat-1 (W M WILLOUGHBY)
7. CAS-4A and CAS-4B (ingejack@xxx.xxxx
8. Re: LilacSat-1 (Paul Stoetzer)
9. Grid Activations (Scott Medbury)
10. Re: CAS-4A and CAS-4B (Greg D)
11. Fw: AO73 Mode change (Graham Shirville)
12. Re: CAMSAT CAS-4A and CAS-4B launched today (Scott)
13. Re: CAS4A CAS4B SDR recordings? (Scott)
14. Re: CAS4A CAS4B SDR recordings? (Jean-Pierre Godet)
----------------------------------------------------------------------
Message: 1
Date: Fri, 16 Jun 2017 11:30:40 -0500
From: Douglas Quagliana <dquagliana@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CAS4A CAS4B SDR recordings?
Message-ID: <8F24C7B9-23B3-4224-9F61-73BF2702A683@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Does anyone have an SDR recording of CAS4A / CAS4B? I would like to try to
demodulate and decode the 4800 baud telemetry signals and see what they say.
Regards,
Douglas
------------------------------
Message: 2
Date: Fri, 16 Jun 2017 10:51:19 -0700
From: <ingejack@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CAS-4A and CAS-4B
Message-ID: <20170616135120.8QHAM.316592.imail@xxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
Beacons on Cas-4a and Cas-4b were very strong this morning at 171u UTC..
Transponders not yet turned on JACK-KC7MG
------------------------------
Message: 3
Date: Fri, 16 Jun 2017 18:31:05 +0000
From: Jean-Pierre Godet <godetj@xxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] CAS4A CAS4B SDR recordings?
Message-ID: <d1e43da7-b51b-c67f-64c7-13a1e6b0d4b9@xxxxxxx.xx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Douglas, all,
On the next passes over the south of western Europe, tomorrow
morning, I will record an i/q file and give you a link to download it
(caution : 1 mn ==> 100 MB).
Despite the fact that the two birds here never climbs very high above
the horizon, maybe 30 deg., the signal is very strong and the
demodulation of the 4800 bps GMSK telemetry very easy. During the pass,
you doesn't lose a frame.
Conditions : GPA + preamplifier in the attic, FCD-Pro+, Gqrx (SDR
prgm), Gpredict (Doppler shift tracking), DireWolf 1200/2400/4800/9600
bps FSK/GMSK demodulator).
Have a nice evening, 73 !
J-P F5YG
On 16/06/2017 16:30, Douglas Quagliana wrote:
> Does anyone have an SDR recording of CAS4A / CAS4B? I would like to try to
demodulate and decode the 4800 baud telemetry signals and see what they say.
>
> Regards,
> Douglas
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: 4
Date: Fri, 16 Jun 2017 14:48:14 -0400
From: Matthew Stevens <matthew@xxxxxxxxx.xxx>
To: Nitin Muttin <vu3tyg@xxxxx.xx.xx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] IC-821H problems
Message-ID:
<CAN8zKtRZK3DuDumLfitK16oUiRgMrU87ong0tcQ7aM1W_ZQ7KA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Yes, I do. Interestingly, I have not had any problems with FM in
either mode J or B. The other day I worked AO-85 successfully, and
immediately switched to EO-79, 2m SSB downlink. I heard no telemetry
or anything else. Then I pointed the antenna over towards some nearby
powerlines, which normally create a lot of annoying static on 2m -
nothing heard. I removed the coax from the 2m jack, and observed a
drop in the noise level (very slight), reconnected the coax and
checked over towards the power lines again, with the same result. I
wasn't hearing anything on 2m SSB, after I had, minutes before, had no
issues hearing on 2m FM.
I'm glad I have other radios to use in the meantime, while I try to
figure this out :-)
73
- Matthew kk4fem
On Sun, Jun 11, 2017 at 2:05 AM, Nitin Muttin <vu3tyg@xxxxx.xx.xx> wrote:
>
> Hi Matthew,
>
> On 2m when on FM mode do you hear the white noise when you open the squelch.
>
> 73
> Nitin [VU3TYG]
>
>
> ________________________________
> From: Matthew Stevens <matthew@xxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Saturday, 10 June 2017 7:06 PM
> Subject: [amsat-bb] IC-821H problems
>
> I'm having a strange issue with my 821. Periodically I lose all
sensitivity, which I've particularly noticed on 2m SSB. I can attach and
detach an antenna with no change in the noise level, and can't hear anything
in the receiver (like the XW-2* beacons, or the AO-73 telemetry). Resetting
the radio seems to fix it.
>
> It doesn't appear to be affecting 70cm, although I haven't had much chance
to test that (there's not always a mode j sat up at the same time as a mode
b one, and when it happens I'm normally just trying to reset the radio as
fast as I can do I can operate the pass). Has anyone experienced anything
like this before?
>
> 73,
>
> - Matthew kk4fem
>
> Sent from my iPhone
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: 5
Date: Fri, 16 Jun 2017 19:03:30 +0000
From: Jean-Pierre Godet <godetj@xxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] CAS4A CAS4B SDR recordings?
Message-ID: <298c03ff-29c6-5b6a-84c9-5d75a57a1639@xxxxxxx.xx>
Content-Type: text/plain; charset=utf-8; format=flowed
Douglas, if this can help, you will find here :
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_telemetry.txt
152 frames of the pass, orbit nr 17, this morning June 16th, starting at
0730 UTC, each frame 147 bytes (coded hexa).
73 !
J-P F5YG
On 16/06/2017 18:31, Jean-Pierre Godet wrote:
> Hi Douglas, all,
>
> On the next passes over the south of western Europe, tomorrow
> morning, I will record an i/q file and give you a link to download it
> (caution : 1 mn ==> 100 MB).
>
> Despite the fact that the two birds here never climbs very high above
> the horizon, maybe 30 deg., the signal is very strong and the
> demodulation of the 4800 bps GMSK telemetry very easy. During the pass,
> you doesn't lose a frame.
> Conditions : GPA + preamplifier in the attic, FCD-Pro+, Gqrx (SDR
> prgm), Gpredict (Doppler shift tracking), DireWolf 1200/2400/4800/9600
> bps FSK/GMSK demodulator).
>
> Have a nice evening, 73 !
>
> J-P F5YG
>
> On 16/06/2017 16:30, Douglas Quagliana wrote:
>> Does anyone have an SDR recording of CAS4A / CAS4B? I would like to
>> try to demodulate and decode the 4800 baud telemetry signals and see
>> what they say.
>>
>> Regards,
>> Douglas
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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: 6
Date: Fri, 16 Jun 2017 14:13:55 -0500
From: W M WILLOUGHBY <redski@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] LilacSat-1
Message-ID: <9A228E0D-63B2-468E-B039-B458AD964172@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Does this bird have a "Satellite Name" designation for uploading QSOs to
LoTW yet?
Thanks,
Red
KC4LE
------------------------------
Message: 7
Date: Fri, 16 Jun 2017 12:26:21 -0700
From: <ingejack@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CAS-4A and CAS-4B
Message-ID: <20170616152621.8ODOZ.317052.imail@xxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
The beacon cw id BJ1SK is definitely CAS-4A Object number 2017-034A
and the beacon cw id BJ1SL is definitely CAS-4B Object number 2017-034B
according to the recording made at 1715 UTC today June 16, 2017 KC7MG
------------------------------
Message: 8
Date: Fri, 16 Jun 2017 15:27:49 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: W M WILLOUGHBY <redski@xxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] LilacSat-1
Message-ID:
<CABzOSOoFPYJ6YesLX6fStgRpL6TsxsA_bGoRW3AJya-2G-dytg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Not yet.
73,
Paul, N8HM
On Fri, Jun 16, 2017 at 3:13 PM, W M WILLOUGHBY <redski@xxxxxxxxx.xxx> wrote:
> Does this bird have a "Satellite Name" designation for uploading QSOs to
LoTW yet?
> Thanks,
> Red
> KC4LE
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: 9
Date: Fri, 16 Jun 2017 15:02:00 -0500
From: "Scott Medbury" <smedbury@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Grid Activations
Message-ID: <000c01d2e6db$6a8800d0$3f980270$@xxx>
Content-Type: text/plain; charset="us-ascii"
I am thinking about activating a number of grids while in Colorado, Wyoming,
and South Dakota in August. The grids would be DM79. DN70, DN71, DN72, DN73,
DN74, DN83, and DN84. All would be on SO50, AO85 and Lilac-2.
I will post more as it gets closer. Please let me know if you are interested
and I will listen for anyone on my list more closely.
73 . Scott KD5FBA
Scott Medbury
KD5FBA
16802 Aprilmont Drive
Sugar Land, TX 77498-1941
------------------------------
Message: 10
Date: Fri, 16 Jun 2017 13:23:33 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Amsat BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] CAS-4A and CAS-4B
Message-ID: <058ccd7a-7052-8a84-98b2-56f80340921b@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I listened in on the 18:48z? pass here in CM98 (I think that was the
time), and heard both satellites easily using object 42758 / 2017-034A
keps. Seemed pretty close.
CAS-4A's beacon might be a few khz low in frequency. I was in USB mode
with a dial frequency of 145.850 at the end of the pass, and the beacon
was coming through at about 1khz on the audio. I would think it should
have been closer to 145.852 or so, as 2m doppler is usually +/- 2.5 khz.
Greg KO6TH
ingejack@xxx.xxx wrote:
> The beacon cw id BJ1SK is definitely CAS-4A Object number 2017-034A
> and the beacon cw id BJ1SL is definitely CAS-4B Object number 2017-034B
> according to the recording made at 1715 UTC today June 16, 2017 KC7MG
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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: 11
Date: Fri, 16 Jun 2017 22:32:46 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
To: "AMSAT" <amsat-bb@xxxxx.xxx>
Cc: funcube@xxxxxxxxxxx.xx.xx
Subject: [amsat-bb] Fw: AO73 Mode change
Message-ID: <39ED40E1AB4A4BC59C531C1A3F21D575@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="utf-8";
reply-type=response
Hi folks,
AO73/FUNcube is now in amateur mode for the weekend with the transponder on!
Please see below for all FUNcube mission info
73s Graham G3VZV and the FUNcube team.
++++++++++++++++++++++++++++++++++
FUNcube frequencies and other details
++++++++++++++++++++++++++++++++++
AO-73 FUNcube-1
The transponder is normally operational only when the satellite is in
eclipse, ie the solar panels are NOT being illuminated. During weekends
(from pm Fridays UTC to PM Sundays UTC) the transponder is operational 24/7.
When the transponder is switched off, the telemetry beacon is on full power,
when the transponder is on the beacon it is on low power. During holidays,
eg Christmas, New Year, Easter, etc, the transponder maybe activated for
extended periods. Watch AMSAT-BB for announcements which are usually made on
Friday evenings (UTC)
The nominal transponder frequencies are:
Uplink: 435.150 - 435.130 MHz LSB (Inverting)
Downlink: 145.950 - 145.970 MHz USB
Telemetry Tx: 145.935 MHz BPSK
(The passband may be up to 15kHz higher depending on on-board temps. Lower
temperatures give higher freqs!)
FUNcube-2 (aka FUNcube on UKube)
The FUNcube-2 sub-system continues to operate autonomously and, almost
continuously, in amateur mode. The transponder is operational and the
telemetry downlink is functioning with about 70mW output. The FUNcube-1
Dashboard does not correctly display the telemetry but it does correctly
decode the data and uploads it to the FUNcube Data Warehouse from where it
can be examined. Most of the real time data channels are operational and
these include battery voltages, temperatures and ADCS data coming via the
main On Board Computer (OBC).
The transponder is interrupted for a few seconds every 2 minutes when the
other transmitter sends its CW beacon and, occasionally, for a few seconds
when the main OBC reboots (approx seven times each orbit).
The nominal transponder frequencies are:
Uplink: 435.080 - 435.060 MHz LSB (Inverting)
Downlink: 145.930 - 145.950 MHz USB
Telemetry Tx: 145.915 MHz BPSK
(The passband may be up to 10kHz higher depending on on-board temps. Low
temperatures give higher freqs!)
EO79 FUNcube-3
Due to power budget constraints the transponder cannot be operational 24/7
and an orbit specific schedule has been developed. The transponder will
commence operation 27 minutes after the spacecraft enters sunlight and will
stay on for a period of 25 minutes. This schedule may be modified in future
months as a result of experience.
The nominal transponder frequencies are:
Uplink: 435.0723-435.0473 MHz LSB (Inverting)
Downlink: 145.946-145.971 MHz USB
Further detailed info on EO79 transponder frequencies is at:
https://amsat-uk.org/2016/11/10/eo79-funcube-3-transponder-commences-regular-o
peration/
EO88/Nayif-1/FUNcube-5
EO88 is presently operating in autonomous mode. The transponder is
operational when the satellite is in eclipse, ie the solar panels are NOT
being illuminated.
When the transponder is switched off, the telemetry beacon is on full power,
when the transponder is on the beacon it is on low power.
The transponder frequencies are:
Uplink: 435.045 ? 435.015 MHz LSB (inverting)
Downlink: 145.960-145.990 MHz USB
Telemetry Tx: 145.940MHz
All FUNcube transponders are sponsored by AMSAT-UK and AMSAT-NL. We are very
grateful for the assistance given by Innovative Solution In Space Bv, The
Netherlands.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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, 16 Jun 2017 23:51:03 -0400
From: Scott <scott23192@xxxxx.xxx>
To: Alan Kung <camsat@xxx.xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] CAMSAT CAS-4A and CAS-4B launched today
Message-ID:
<CAJCSnOb1w+QqnKGbqSJQqZBpwPLqFgNTehEbTzrDC6q5BB_xvw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Thank you for the details on these new satellites, Alan.
Signals on the telemetry frequencies from both satellites are extremely
strong.
Is there any information available on what the AX.25 4.8k Baud GMSK
Telemetry streams contain, or how to decode the data?
Thanks very much!
-Scott, K4KDR
Montpelier, VA USA
===============================
On Thu, Jun 15, 2017 at 1:54 AM, Alan Kung <camsat@xxx.xxx.xxx> wrote:
> CAS-4A and CAS-4B Satellites from CAMSAT Launched today
>
>
> Two CAMSAT?s armature radio payloads piggybacked on the optical remote
> sensing micro-satellites OVS-1A and OVS-1B have been launched at 11:00BJT
> on June 15, 2017 at The Jiuquan Satellite Launch Center of China, using
> CZ-4B launch vehicle. The primary of this launch is a hard X-ray modulation
> telescope satellite (HXMT).
>
>
> ? Satellite Name: CAS-4A/OVS-1A
> ? Architecture: Micro-satellite
> ? Dimensions: 494Lx499Wx630H mm
> ? Mass: 55kg
> ? Stabilization: three-axis stabilization system with its +Y surface
> facing the earth
> ? Primary Payload: optical Camera with 1.98m resolution
> ? Orbit:
> ? Orbit type : Sun synchronization orbit
> ? Apogee : 524km
> ? Inclination : 43?
> ? Period : 95.1min
>
>
> ? Amateur Radio Payload:
> ? Call sign: BJ1SK
> ? VHF Antenna: one 1/4? monopole antenna with max.0dBi gain is located at
> +Z side
> ? UHF Antenna: one 1/4? monopole antenna with max.0dBi gain is located at
> -Z side
> ? CW Telemetry Beacon: 145.855MHz 17dBm
> ? AX.25 4.8k Baud GMSK Telemetry: 145.835MHz 20dBm
> ? U/V Linear Transponder Downlink: 145.870MHz 20dBm, 20kHz,
> Inverted
> ? U/V Linear Transponder Uplink: 435.220MHz
>
>
>
>
> ? Satellite Name: CAS-4B/OVS-1B
> ? Architecture: Micro-satellite
> ?Dimensions: 494Lx499Wx630H mm
> ?Mass: 55kg
> ? Stabilization: three-axis stabilization system with its +Y surface
> facing the earth
> ? Primary Payload: optical Camera with 1.98m resolution
> ?Orbit:
> ? Orbit type : Sun synchronization orbit
> ? Apogee : 524km
> ? Inclination : 43?
> ? Period : 95.1min
>
>
> ?Amateur Radio Payload:
> ? Call sign: BJ1SL
> ? VHF Antenna: one 1/4? monopole antenna with max.0dBi gain is located at
> +Z side
> ? UHF Antenna: one 1/4? monopole antenna with max.0dBi gain is located at
> -Z side
> ? CW Telemetry Beacon: 145.910MHz 17dBm
> ? AX.25 4.8k Baud GMSK Telemetry: 145.890MHz 20dBm
> ?U/V Linear Transponder Downlink: 145.925MHz 20dBm, 20kHz,
> Inverted
> ?U/V Linear Transponder Uplink: 435.280MHz
>
>
> 73!
> Alan Kung, BA1DU
------------------------------
Message: 13
Date: Sat, 17 Jun 2017 01:32:43 -0400
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] CAS4A CAS4B SDR recordings?
Message-ID: <70680F61F1BA48239EB5FEB9F3B8DC43@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Sorry it took me so long to zip & upload the IQ recording from Friday
morning U.S. time, Douglas.
If anyone has not had a pass from the new CAS-4A or 4B satellites yet, feel
free to download a PCM-16 IQ wav file of the pass from:
http://www.qsl.net/k/k4kdr//files/HDSDR_20170616_103700Z_145735kHz_RF--cas4a-b
.zip
... for anyone not completely familiar with SDR's yet, this is not an audio
.wav file, but an "IQ" wav file suitable for replaying in SDR software.
Comes in very handy for testing decoders or sharing like this between people
so we can benefit from others' big antennas, geographical location, or lack
of sleep!
I certainly hope the voice transponder has a signal as strong as these 4k8
telemetry streams. This file was recorded unattended using a 2m X-Quad (no
pre-amp) to an SDRPlay SDR. However, after seeing the signal on the screen,
you might be able to receive it with a coat hanger.
Instead of downloading my recording and playing it back yourself, if anyone
would just like to see the signal and volume of data being downloaded, I put
up a short video at:
https://www.youtube.com/watch?v=Yzvi9oWcxhQ&feature=youtu.be
73!
-Scott, K4KDR
------------------------------------------------------------------------------
--
-----Original Message-----
From: Douglas Quagliana
Sent: Friday, June 16, 2017 12:30 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CAS4A CAS4B SDR recordings?
Does anyone have an SDR recording of CAS4A / CAS4B? I would like to try to
demodulate and decode the 4800 baud telemetry signals and see what they say.
Regards,
Douglas
------------------------------
Message: 14
Date: Sat, 17 Jun 2017 09:46:28 +0000
From: Jean-Pierre Godet <godetj@xxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] CAS4A CAS4B SDR recordings?
Message-ID: <f83df8c6-4b06-a49f-891a-db614db0156c@xxxxxxx.xx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi Douglas, all!
I'm late as Scott just shared his full pass excellent i/q file and
nice video.
If this can help, I recorded only 50 secondes of the last pass over
western Europe (orbit nr 32) so that the files don't become too large.
A 32-bit floating point raw i/q file (for Gqrx, etc...):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.raw
The same one translated in a PCM 16-bit wav file (for SDR#, etc...):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.wav
The full 199 frames of this 50 seconds record (text hexa):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.txt
And the sound of space with the CW telemetry (mp3):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.mp3
Have a nice w.-e.!
J-P F5YG
On 16/06/2017 19:03, Jean-Pierre Godet wrote:
> Douglas, if this can help, you will find here :
> http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_telemetry.txt
> 152 frames of the pass, orbit nr 17, this morning June 16th, starting at
> 0730 UTC, each frame 147 bytes (coded hexa).
>
> 73 !
>
> J-P F5YG
>
> On 16/06/2017 18:31, Jean-Pierre Godet wrote:
>> Hi Douglas, all,
>>
>> On the next passes over the south of western Europe, tomorrow
>> morning, I will record an i/q file and give you a link to download it
>> (caution : 1 mn ==> 100 MB).
>>
>> Despite the fact that the two birds here never climbs very high
>> above the horizon, maybe 30 deg., the signal is very strong and the
>> demodulation of the 4800 bps GMSK telemetry very easy. During the
>> pass, you doesn't lose a frame.
>> Conditions : GPA + preamplifier in the attic, FCD-Pro+, Gqrx (SDR
>> prgm), Gpredict (Doppler shift tracking), DireWolf 1200/2400/4800/9600
>> bps FSK/GMSK demodulator).
>>
>> Have a nice evening, 73 !
>>
>> J-P F5YG
>>
>> On 16/06/2017 16:30, Douglas Quagliana wrote:
>>> Does anyone have an SDR recording of CAS4A / CAS4B? I would like to
>>> try to demodulate and decode the 4800 baud telemetry signals and see
>>> what they say.
>>>
>>> Regards,
>>> Douglas
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>> _______________________________________________
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Subject: Digest Footer
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Sent via amsat-bb@xxxxx.xxx.
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AMSAT-NA.
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http://www.amsat.org/mailman/listinfo/amsat-bb
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End of AMSAT-BB Digest, Vol 12, Issue 151
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