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CX2SA > SATDIG 11.06.08 00:33l 563 Lines 19817 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Cute 1.7+APDII Latest Banner (Henk, PA3GUO)
2. Cute-1.7 + APD II Latest CW format and APD observation
(Hiroki Ashida)
3. AO-51 MODE U/S (Luc Leblanc)
4. AO-51 MODE V.../S (Luc Leblanc)
5. Re: Cute-1.7 + APD II Latest CW format and APD observation
(Robert Bruninga)
6. Re: AO-51 Field Day Mode (Jeff Moore)
7. AO-51 S BAND downlink (Luc Leblanc)
8. Yeasu G-5400B az/el rotor for sale (Bill Bruno)
9. Re: cubesats (Robert Bruninga)
10. Re: D-STAR experiment on Cubesat (Bruce Robertson)
11. Re: Cute-1.7 + APD II Latest CW format and APD observation
(Mike Rupprecht)
----------------------------------------------------------------------
Message: 1
Date: Tue, 10 Jun 2008 15:30:11 +0200 (CEST)
From: "Henk, PA3GUO" <hamoen(AT)iae.nl>
Subject: [amsat-bb] Re: Cute 1.7+APDII Latest Banner
To: <amsat-bb(AT)amsat.org>
Message-ID: <5485.80.255.245.177.1213104611.squirrel(AT)webmail.iae.nl>
Content-Type: text/plain; charset=iso-8859-1
Same here this morning:
09:20utc June 10 437.275 MHz CW
cute 87ccadbd392724685c3617 hihi de jq1ytc digion
cute 88ccaeba39272568613a17 hihi de jq1ytc digion
cute 87cbadb639272469564117 hihi de jq1ytc digion
cute 87cbadb93...........17 hihi de jq1ytc digion
cute 88ccadba3927256a623d17 hihi de jq1ytc digion
cute 87cbadb93928256a654117 hihi de jq1ytc digion
cute
Henk, PA3GUO
------------------------------
Message: 2
Date: Tue, 10 Jun 2008 22:53:15 +0900
From: Hiroki Ashida <hiroki(AT)lss.mes.titech.ac.jp>
Subject: [amsat-bb] Cute-1.7 + APD II Latest CW format and APD
observation
To: AMSAT Bulletin Board <amsat-bb(AT)amsat.org>
Message-ID: <484E874B.8090507(AT)lss.mes.titech.ac.jp>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Dear Members,
I'm Hiroki Ashida at Tokyo Tech (JQ1YCZ).
As Mr.Hurst, Mr.Rupprecht and Mr.Henk have reported, our CW telemetry
was changed. We're currently testing an amateur service function, "a
digital repeater," so the message "hi hi de jq1ytc digi on" have been
transmitted. I'm looking forwad to open our amateur service channel to
you all!
And the APD sensor was turned on in the last pass over Japan and a
long-term APD observation was started. APD status packet can be received
all over the world until 12:00, Jun 11 (UTC). Your kind cooperation is
greatly appreciated. If you received it, please let us know! ->
cute1.7_receive(AT)lss.mes.titech.ac.jp
FM packets are transmitted on 437.475MHz and packet formats are
available in the following web-page.
http://lss.mes.titech.ac.jp/ssp/cute1.7/fm_mode_apd_e.html
4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A-D0-30-77-B8-03-16-99
For exapmle, according to an above APD status packet we can obtain
informations as;
4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A : Header(JQ1YTC>JQ1YCZ)
D0 : APD Packet ID (Fixed)
30 : Status Code
APD Status : Operational
HV Status : Set Value = Output Value
Temp Correction : Active
Data Mode : Counter Valid
Detector : APD A
APD Gain : Gain 30
Threshold : 219mV
77 : Temperature
0x77 = 119 -> (119/255)*91.712-48.569 = -5.7 [degC]
B8 : High Voltage
0xB8 = 184 -> (184/255)*396.5 = 286 [V]
03-16-99 : Counter
0x1699 = 5785 -> 5785 * 23 = 46280
Best Regards,
Hiroki Ashida
Cute-1.7 + APD II
--
Hiroki Ashida <hiroki(AT)lss.mes.titech.ac.jp>
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
TEL/FAX : +81-3-5734-2644
Room 554, Ishikawadai 1st Bldg, Tokyo Institute of Technology
2-12-1 O-okayama, Meguro-ku, Tokyo, Japan
------------------------------
Message: 3
Date: Tue, 10 Jun 2008 10:00:18 -0400
From: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Subject: [amsat-bb] AO-51 MODE U/S
To: amsat-bb(AT)AMSAT.Org
Message-ID: <484E50B2.3836.9100AA(AT)lucleblanc6.videotron.ca>
Content-Type: text/plain; charset=US-ASCII
It's time to try new antenna on S band here is some results
BBQ grill with standard linear feed dipole Very strong and deep fades but
signal peak at S9 plus 40 not very usable due to the fades
Single patch element a lot less fades but signal reach s9=5 at max
WI-FI double 20 yagi elements the best up till now few fade but signal peak
at s9 plus 50 at max i believe if i was able to rotate the
antenna the fades will be eliminated.
It is a WI-FI beam "odd shape" the driven element is in a plastic enclosure
and the 2 row of 20 elements begin in a 45 degree shape up the
6th diven element and the two row became parallel at the 7th element until the
end of the beam.
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 4
Date: Tue, 10 Jun 2008 10:02:46 -0400
From: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Subject: [amsat-bb] AO-51 MODE V.../S
To: amsat-bb(AT)AMSAT.Org
Message-ID: <484E5146.29470.9340F5(AT)lucleblanc6.videotron.ca>
Content-Type: text/plain; charset=US-ASCII
Just to correct the title of my previous one it should read MODE V/S
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 5
Date: Tue, 10 Jun 2008 12:19:51 -0400
From: "Robert Bruninga" <bruninga(AT)usna.edu>
Subject: [amsat-bb] Re: Cute-1.7 + APD II Latest CW format and APD
observation
To: "'Hiroki Ashida'" <hiroki(AT)lss.mes.titech.ac.jp>, "'AMSAT Bulletin
Board'" <amsat-bb(AT)amsat.org>
Message-ID: <A8391DCF771341A8B4F201FB92F40612(AT)ewlab.usna.edu>
Content-Type: text/plain; charset="US-ASCII"
OK, now you caught my interest!
> We're currently testing an amateur service function,
> "a digital repeater," so the message "hi hi de jq1ytc
> digi on" have been transmitted. I'm looking forwad
> to open our amateur service channel to you all!
Yes, I just copied packets on the noon East coast USA pass.
But they were short beacons every 16 seconds it appeared.
Bob, WB4APR
------------------------------
Message: 6
Date: Tue, 10 Jun 2008 10:13:54 -0700
From: "Jeff Moore" <tnetcenter(AT)gmail.com>
Subject: [amsat-bb] Re: AO-51 Field Day Mode
To: "amsat-bb(AT)AMSAT.Org" <amsat-bb(AT)amsat.org>
Message-ID: <006001c8cb1d$5d133890$9db4e4d8(AT)TNTCENTER>
Content-Type: text/plain; charset="iso-8859-1"
So is Amsat Field Day and ARRL Field Day 2 different events?? What is the
date for AMSAT Field Day?
Jeff -- KE7ACY
CN94ib
----- Original Message -----
From: "Bruce" <kk5do(AT)amsat.org>
remember... although arrl and amsat rules are similar, they are not
identical. for amsat field day, you may make one contact on each
single channel transponder. if both transponders are turned on for a
particular satellite on field day, you can make one contact on each.
73...bruce
as amsat director for contests and awards
------------------------------
Message: 7
Date: Tue, 10 Jun 2008 12:04:15 -0400
From: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Subject: [amsat-bb] AO-51 S BAND downlink
To: amsat-bb(AT)AMSAT.Org
Message-ID: <484E6DBF.7392.1027D18(AT)lucleblanc6.videotron.ca>
Content-Type: text/plain; charset=US-ASCII
On the last morning pass with a max elevation of 7 degrees i was able to copy
at 5 degrees and probably lower than that with an
unobstructed view. The 2X20 el yagi beam if really working well.
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 8
Date: Tue, 10 Jun 2008 14:34:36 -0400
From: "Bill Bruno" <billbruno(AT)earthlink.net>
Subject: [amsat-bb] Yeasu G-5400B az/el rotor for sale
To: "Amsat-bb(AT)amsat.org" <amsat-bb(AT)amsat.org>
Message-ID: <004a01c8cb28$a2ebc570$0300a8c0(AT)billslaptop>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Yaesu G-5400B az/el rotor for sale $350. If interested please contact me off
list.
Bill KB2RC
------------------------------
Message: 9
Date: Tue, 10 Jun 2008 14:35:20 -0400
From: "Robert Bruninga" <bruninga(AT)usna.edu>
Subject: [amsat-bb] Re: cubesats
To: "'Amsat Buleitin Board'" <amsat-bb(AT)AMSAT.Org>
Message-ID: <F14B67417D8A4749AA71D71DCA8003C9(AT)ewlab.usna.edu>
Content-Type: text/plain; charset="US-ASCII"
> 2) it should have a valid amateur radio call sign
> if its to be allocated a frequency in the Satellite
> section of the Amateur Bands.
There is no present requirement for the use of licensed
callsigns on the satellites. I wish I had learned than more
than a week month before launch. That is why PCSAT-1 always
comes up with the W3ADO-1 callsign. And we have to upload the
PCSAT-1 callsign after every reset.
That said, however, they are required to abide by all of the
other requirements of the Amateur Satellite Service.
And I am all for keeping it that way.
Bob, Wb4APR
------------------------------
Message: 10
Date: Tue, 10 Jun 2008 15:46:56 -0300
From: "Bruce Robertson" <ve9qrp(AT)gmail.com>
Subject: [amsat-bb] Re: D-STAR experiment on Cubesat
To: "Tony Langdon" <vk3jed(AT)gmail.com>
Cc: "David B. Toth" <ve3gyq(AT)amsat.org>, amsat bb <amsat-bb(AT)amsat.org>
Message-ID:
<49657a760806101146q11893f6bv7e922bd75ed64e36(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
On Mon, Jun 9, 2008 at 7:48 PM, Tony Langdon <vk3jed(AT)gmail.com> wrote:
> At 03:35 AM 6/10/2008, Mark Vandewettering wrote:
>
>>It is my understanding that it is simple a relabeled Icom radio. If
>>it really weren't an issue for other manufacturers, one might
>>reasonably ask why we aren't seeing D-Star radios from other
>
> I believe you are correct there, a rebadged ID-800, according to what
> I've read.
>
>>manufacturers. Granted, there could be other reasons, but something
>>is apparently keeping other manufacturers from building these radios.
>>This means that essentially we are in a single source situation, where
>
> Only the other manufacturers can answer that. The situation
> certainly hasn't stopped ham experimentation, and there has been at
> least one somewhat D-STAR capable radio built (there were issues, but
> they were related to the specific components chosen). There is a
> software based D-STAR demodulator
> (http://groups.yahoo.com/group/dstarsoftware) that apparently works
> quite well, when connected to a 9600 bps capable radio. Of course, a
> DV Dongle is needed to recover the audio, but the software will
> decode the headers and the low speed data stream. Transmit is just a
> matter of the author getting around to writing that capability. At
> this stage, he has been focusing on improving the receive performance
> of his demodulator.
>
>>we can expect D-Star to remain fairly expensive. Indeed, the codec
>>chip costs $20, but we see the price differential for these radios to
>>be well over $100, even on an HT which is fairly expensive to begin
>>with. That's a pretty high markup. (IC-91AD is $524, IC-91A is $408
>>at universal radio). The UT-118 to do an upgrade is $189. The DV-
>>Dongle is $200.
>
> I suspect that will change with time, if (or more likely, when)
>
>>But I do think there are reasons to be less than fully happy.
>>
>>1. We have committed ourselves to building a system with parts from a
>>single manufacturer. On this list, we have heard that Kenwood is
>>unable to build new TH-D7As because they can't get a part which is
>>single sourced, only 10 years into its lifetime. It doesn't seem to
>>me to be good engineering to design our repeater systems around such a
>>part, given our expected longevity for repeaters. I admit, this
>>concern is largely paranoia, but paranoia pays off occasionally.
>
> You have a point. The true single source issue is not ICOM, it is
> really DVSI. We can fix the ICOM part ourselves over time, with DV
> adapters and surplus FM radios with direct discriminator/modulator
> access. The controller might be trickier, but not beyond our
> capabilities, given time.
>
>>2. We are denying ourselves an opportunity: the opportunity to
>>understand, modify, and create new digital voice systems. If we go to
>>using AMBE, we are stuck: stuck with a technology that we can't extend
>>or expand because of IP property law. Indeed, we will have invested
>>considerable sums of money in such a system, which will present a
>>serious impediment to future developments, since we will have so much
>>money already invested in the old system.
>
> We are stuck with AMBE... for now. Perhaps in the future, there will
> be a way to incorporate other (i.e. open source) vocoders alongside
> AMBE. However, the developers will also need to push to get the
> vocoder into silicon fairly rapidly, once it's performing acceptably,
> so a manufacturer can produce the chips in the millions for
> installation into radios. The ideal vocoder will have readily
> available and unencombered software (for running on a PC) and
> hardware (i.e. DSP chip for installing into a radio) implementations.
>
>>3. Gadgets like the DV-Dongle cost $200, and you hook them to your
>>PC. Your PC could do _everything_ that the DV-Dongle does in software
>>(obviously, since the AMBE chip is just a low end TI DSP, mask
>>programmed with the AMBE decoder). Imagine how much higher the
>>deployment of D-Star would be if we could have a freely available open
>>source application that people could run on their Windows, Mac and
>>Linux machines for _zero cost_. As Gordon Bell once said
>>(paraphrasing from memory) "the cheapest part of a computer are the
>>parts that aren't there". Replacing a $20 with, well, nothing but
>>electrons is a big deal.
>
> In an ideal world, yes. I believe we need to work with what's there
> now, and at the same time push for a better future.
>
>
>>Bruce echos most of these issues on his page:
>>
>> http://codec2.org/
>
> Unfortunetely, he does get a few critical technical details wrong, if
> he is interesting in writing a vocoder compatible with D-STAR. Such
> a vocoder needs to (1) compress voice down to 2400 bps (not the
> 5000-6000bps he states for VHF), and (2) provide FEC, as the D-STAR
> protocol itself doesn't provide FEC. The difference in bit rate
> between 5000 and 2400 bps is a world of difference for
> performance. Of course, we can always use LPC-10 and sound like Daleks...
;)
>
> 73 de VK3JED
> http://vkradio.com
>
I appreciate very much this civilized debate, which helps me
understand the issues involved in this new technology. I, too, find it
frustrating that this protocol has no prospect for an in-software
codec as of yet, but I understand the practical trade-offs that led to
this situation. I wonder if people who are aware of the design could
comment on if LPC-10 could theoretically be put ontop the transport
layer. I'm not sure I'd mind 'sounding like Daleks', at least for the
purpose of operating this cubesat.
Secondly, does anyone know which d-star radios have CAT, and does the
CAT control line conflict with the data line, as it does on the
Kenwood radios? If this were the case, I'd be inclined to stick with
the Dongle approach.
------------------------------
Message: 11
Date: Tue, 10 Jun 2008 20:56:18 +0200
From: "Mike Rupprecht" <mail(AT)mike-rupprecht.de>
Subject: [amsat-bb] Re: Cute-1.7 + APD II Latest CW format and APD
observation
To: "'Hiroki Ashida'" <hiroki(AT)lss.mes.titech.ac.jp>, "'AMSAT Bulletin
Board'" <amsat-bb(AT)amsat.org>
Message-ID: <000001c8cb2b$aafd7a30$00f86e90$(AT)de>
Content-Type: text/plain; charset="iso-8859-1"
Dear Hiroki,
first middle-european pass was low (13 degr). Here are the decoded packets:
2008-06-10 18:39:32.060 UTC: D0 14 82 00 00 00 00
2008-06-10 18:39:47.910 UTC: D0 14 82 00 00 00 00
2008-06-10 18:40:03.780 UTC: D0 14 82 00 00 00 00
2008-06-10 18:40:19.640 UTC: D0 14 82 00 00 00 00
2008-06-10 18:40:35.500 UTC: D0 14 82 00 00 00 00
2008-06-10 18:40:51.380 UTC: D0 14 82 00 00 00 00
2008-06-10 18:41:07.230 UTC: D0 14 83 00 00 00 00
2008-06-10 18:41:23.110 UTC: D0 14 83 00 00 00 00
2008-06-10 18:41:38.970 UTC: D0 14 83 00 00 00 00
2008-06-10 18:41:54.830 UTC: D0 14 83 00 00 00 00
2008-06-10 18:42:10.700 UTC: D0 14 83 00 00 00 00
2008-06-10 18:42:26.560 UTC: D0 14 83 00 00 00 00
2008-06-10 18:42:42.440 UTC: D0 14 83 00 00 00 00
2008-06-10 18:42:58.300 UTC: D0 14 84 00 00 00 00
2008-06-10 18:43:14.170 UTC: D0 14 84 00 00 00 00
2008-06-10 18:43:30.030 UTC: D0 14 84 00 00 00 00
2008-06-10 18:43:45.890 UTC: D0 14 85 00 00 00 00
2008-06-10 18:44:01.770 UTC: D0 14 85 00 00 00 00
2008-06-10 18:44:17.630 UTC: D0 14 85 00 00 00 00
2008-06-10 18:44:33.500 UTC: D0 14 85 00 00 00 00
2008-06-10 18:44:49.360 UTC: D0 14 86 00 00 00 00
2008-06-10 18:45:05.230 UTC: D0 14 86 00 00 00 00
2008-06-10 18:45:21.090 UTC: D0 14 86 00 00 00 00
2008-06-10 18:45:36.970 UTC: D0 14 86 00 00 00 00
2008-06-10 18:45:52.830 UTC: D0 14 87 00 00 00 00
2008-06-10 18:46:08.690 UTC: D0 14 87 00 00 00 00
2008-06-10 18:46:24.560 UTC: D0 14 87 00 00 00 00
2008-06-10 18:46:40.420 UTC: D0 14 87 00 00 00 00
2008-06-10 18:46:56.300 UTC: D0 14 87 00 00 00 00
2008-06-10 18:47:12.160 UTC: D0 14 87 00 00 00 00
2008-06-10 18:47:28.030 UTC: D0 14 87 00 00 00 00
2008-06-10 18:47:43.890 UTC: D0 14 87 00 00 00 00
2008-06-10 18:47:59.770 UTC: D0 14 87 00 00 00 00
73, Mike
DK3WN
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org] Im
Auftrag von Hiroki Ashida
Gesendet: Dienstag, 10. Juni 2008 15:53
An: AMSAT Bulletin Board
Betreff: [amsat-bb] Cute-1.7 + APD II Latest CW format and APD observation
Dear Members,
I'm Hiroki Ashida at Tokyo Tech (JQ1YCZ).
As Mr.Hurst, Mr.Rupprecht and Mr.Henk have reported, our CW telemetry
was changed. We're currently testing an amateur service function, "a
digital repeater," so the message "hi hi de jq1ytc digi on" have been
transmitted. I'm looking forwad to open our amateur service channel to
you all!
And the APD sensor was turned on in the last pass over Japan and a
long-term APD observation was started. APD status packet can be received
all over the world until 12:00, Jun 11 (UTC). Your kind cooperation is
greatly appreciated. If you received it, please let us know! ->
cute1.7_receive(AT)lss.mes.titech.ac.jp
FM packets are transmitted on 437.475MHz and packet formats are
available in the following web-page.
http://lss.mes.titech.ac.jp/ssp/cute1.7/fm_mode_apd_e.html
4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A-D0-30-77-B8-03-16-99
For exapmle, according to an above APD status packet we can obtain
informations as;
4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A : Header(JQ1YTC>JQ1YCZ)
D0 : APD Packet ID (Fixed)
30 : Status Code
APD Status : Operational
HV Status : Set Value = Output Value
Temp Correction : Active
Data Mode : Counter Valid
Detector : APD A
APD Gain : Gain 30
Threshold : 219mV
77 : Temperature
0x77 = 119 -> (119/255)*91.712-48.569 = -5.7 [degC]
B8 : High Voltage
0xB8 = 184 -> (184/255)*396.5 = 286 [V]
03-16-99 : Counter
0x1699 = 5785 -> 5785 * 23 = 46280
Best Regards,
Hiroki Ashida
Cute-1.7 + APD II
--
Hiroki Ashida <hiroki(AT)lss.mes.titech.ac.jp>
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
TEL/FAX : +81-3-5734-2644
Room 554, Ishikawadai 1st Bldg, Tokyo Institute of Technology
2-12-1 O-okayama, Meguro-ku, Tokyo, Japan
_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 3, Issue 295
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