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CX2SA > SATDIG 22.05.15 19:43l 998 Lines 33298 Bytes #999 (0) @ WW
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Read: GUEST
Subj: AMSAT-BB-digest V10 143
Path: IW8PGT<CX2SA
Sent: 150522/1734Z @:CX2SA.SAL.URY.SOAM #:21231 [Salto] FBB7.00e $:AMSATBB10143
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Error just started with SpaceTrack TLE Retriever 3 (Alan)
2. Re: Error just started with SpaceTrack TLE Retriever 3
(Rick Walter)
3. PSat Frames (Edson W. R. Pereira)
4. Beijing may launch amateur satellites in July inc Linear
Transponder (M5AKA)
5. Re: Beijing may launch amateur satellites in July inc Linear
Transponder (Andrew Glasbrenner)
6. HELP WITH SATPC32 (KE6PPE@xxx.xxxx
7. PSAT Spin Data reported! (Robert Bruninga)
8. Re: HELP WITH SATPC32 (Erich Eichmann)
9. Re: PSAT Spin Data reported! now plotted! (Robert Bruninga)
10. Re: Receiving PSAT PSK31 FM downlink (Users Welcome)
(Robert Bruninga)
11. PSAT downlink now showing on FINDU.COM (Robert Bruninga)
12. PSK-31 Author ideas (Robert Bruninga)
13. Re: Receiving PSAT PSK31 FM downlink (Users Welcome) (Alan)
----------------------------------------------------------------------
Message: 1
Date: Fri, 22 May 2015 05:57:25 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: "'Rick Walter'" <wb3csy@xxxxx.xxx>
Cc: 'AMSAT-BB' <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Error just started with SpaceTrack TLE
Retriever 3
Message-ID: <003a01d0947e$1738c150$45aa43f0$@xxxxx.xxx>
Content-Type: text/plain; charset="UTF-8"
Rick,
Yes. The deadline to upgrade your password was this week. Go to Space
Track and log in. If you need to, it will take you to the form. Then
update and save the password in TLE Retriever 3. No upgrade necessary. If
you have an incorrect password, it will give you exactly the errror message
you reported. You will probably see that the download in fact did not work,
showing 0 files downloaded, but no error message is generated.
73s,
Alan
WA4SCA
<-----Original Message-----
<From: Rick Walter [mailto:wb3csy@xxxxx.xxxx
<Sent: Friday, May 22, 2015 3:37 AM
<To: <wa4sca@xxxxx.xxx>
<Cc: AMSAT-BB
<Subject: Re: [amsat-bb] Error just started with SpaceTrack TLE Retriever 3
<
<Hi Alan. Is this something just recent? I know while back we had to do
something like that and then after that,we had to
<upgrade to a new version.
<Rick
<
<Sent from Rick's iPad2
<
<On May 22, 2015, at 1:56 AM, <wa4sca@xxxxx.xxx <mailto:wa4sca@xxxxx.xxx> >
<wa4sca@xxxxx.xxx
<<mailto:wa4sca@xxxxx.xxx> > wrote:
<
<
<
< Have you updated to the new password requirement, and also entered it in
the program?
<
< Alan
< WA4SCA
<
<
< From: Rick Walter <mailto:wb3csy@xxxxx.xxx>
< Sent: ?Friday?, ?May? ?22?, ?2015 ?12?:?33? ?AM
< To: AMSAT-BB <mailto:amsat-bb@xxxxx.xxx>
<
< I usually update my Keplerian elements to track the birds with T.S.
Kelso's SpaceTrack TLE Retriever 3, stand alone
<Windows program. It has worked flawlessly for many years on my laptops
running XP and Windows 7. Starting this week, I
<get an error on all three computers. The program downloads the master lists
fine but when I click the button to parse them out
<and check for errors, I immediately get "Unhandled exception has occurred
in your application Spacetrak ....
< Index and length must refer to a location within the string parameter name
length. I am using version 3.0.1.3
<(2013Jul17) and even upgraded on one computer to version 3.0.1.5 (2014
Dec18). I sent an email to T.S. Kelso and attached
<a debug file but have not heard anything in several days. Any one have the
same problem or know of a fix? Thank you.
< Rick
< WB3CSY
<
< Sent from Rick's iPad2
< _______________________________________________
< Sent via AMSAT-BB@xxxxx.xxx <mailto: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: 2
Date: Fri, 22 May 2015 07:29:33 -0400
From: Rick Walter <wb3csy@xxxxx.xxx>
To: "<APBIDDLE@xxxxxxx.xxx>" <APBIDDLE@xxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Error just started with SpaceTrack TLE
Retriever 3
Message-ID: <98359515-192C-429B-A549-C84255D0630B@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Thank you Alan. I had no indication we needed to upgrade a password. I
appreciate the help.
73,
Rick
Sent from Rick's iPad2
> On May 22, 2015, at 6:57 AM, Alan <wa4sca@xxxxx.xxx> wrote:
>
> Rick,
>
> Yes. The deadline to upgrade your password was this week. Go to Space
Track and log in. If you need to, it will take you to the form. Then
update and save the password in TLE Retriever 3. No upgrade necessary. If
you have an incorrect password, it will give you exactly the errror message
you reported. You will probably see that the download in fact did not work,
showing 0 files downloaded, but no error message is generated.
>
> 73s,
>
> Alan
> WA4SCA
>
>
> <-----Original Message-----
> <From: Rick Walter [mailto:wb3csy@xxxxx.xxxx
> <Sent: Friday, May 22, 2015 3:37 AM
> <To: <wa4sca@xxxxx.xxx>
> <Cc: AMSAT-BB
> <Subject: Re: [amsat-bb] Error just started with SpaceTrack TLE Retriever 3
> <
> <Hi Alan. Is this something just recent? I know while back we had to do
something like that and then after that,we had to
> <upgrade to a new version.
> <Rick
> <
> <Sent from Rick's iPad2
> <
> <On May 22, 2015, at 1:56 AM, <wa4sca@xxxxx.xxx <mailto:wa4sca@xxxxx.xxx>
> <wa4sca@xxxxx.xxx
> <<mailto:wa4sca@xxxxx.xxx> > wrote:
> <
> <
> <
> < Have you updated to the new password requirement, and also entered it
in the program?
> <
> < Alan
> < WA4SCA
> <
> <
> < From: Rick Walter <mailto:wb3csy@xxxxx.xxx>
> < Sent: ?Friday?, ?May? ?22?, ?2015 ?12?:?33? ?AM
> < To: AMSAT-BB <mailto:amsat-bb@xxxxx.xxx>
> <
> < I usually update my Keplerian elements to track the birds with T.S.
Kelso's SpaceTrack TLE Retriever 3, stand alone
> <Windows program. It has worked flawlessly for many years on my laptops
running XP and Windows 7. Starting this week, I
> <get an error on all three computers. The program downloads the master
lists fine but when I click the button to parse them out
> <and check for errors, I immediately get "Unhandled exception has occurred
in your application Spacetrak ....
> < Index and length must refer to a location within the string parameter
name length. I am using version 3.0.1.3
> <(2013Jul17) and even upgraded on one computer to version 3.0.1.5 (2014
Dec18). I sent an email to T.S. Kelso and attached
> <a debug file but have not heard anything in several days. Any one have
the same problem or know of a fix? Thank you.
> < Rick
> < WB3CSY
> <
> < Sent from Rick's iPad2
> < _______________________________________________
> < Sent via AMSAT-BB@xxxxx.xxx <mailto: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: 3
Date: Fri, 22 May 2015 08:45:28 -0300
From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] PSat Frames
Message-ID:
<CALNQy49omE8vjWw8GjW0HvT3aSX=gOgQoxKhnNUwdb97sVoJDA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Received during the night @ GG56
PSAT-1/ARISS>APOFF>UI,?,F0:
s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK
PSAT-1/ARISS>APOFF>UI,?,F0:
T#254,836,089,888,915,835,00011100
PSAT-1/ARISS>APOFF>UI,?,F0:
s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK
PSAT-1/ARISS>APOFF>UI,?,F0:
T#256,861,074,788,914,838,00011100
73, Edson PY2SDR
---
- We humans have the capability to do amazing things if we work together.
- N?s seres humanos temos a capacidade de fazer coisas incr?veis se
trabalharmos juntos.
------------------------------
Message: 4
Date: Fri, 22 May 2015 11:55:43 +0000 (UTC)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Beijing may launch amateur satellites in July inc
Linear Transponder
Message-ID:
<990328116.490330.1432295743606.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Beijing may launch amateur satellites in July. One report says 20 CubeSats ?
http://amsat-uk.org/2015/05/22/beijing-satellites/
73 Trevor M5AKA
----
AMSAT-UK http://amsat-uk.org/
Twitter?https://twitter.com/AmsatUK
Facebook?https://facebook.com/AmsatUK
----
------------------------------
Message: 5
Date: Fri, 22 May 2015 08:56:50 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: M5AKA <m5aka@xxxxx.xx.xx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Beijing may launch amateur satellites in July
inc Linear Transponder
Message-ID: <670D348C-13E2-4B3F-9452-DF46A5FB65F0@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I am -really- curious to what orbit these are going.
73, Drew KO4MA
Sent from my iPhone
> On May 22, 2015, at 7:55 AM, M5AKA <m5aka@xxxxx.xx.xx> wrote:
>
> Beijing may launch amateur satellites in July. One report says 20 CubeSats ?
> http://amsat-uk.org/2015/05/22/beijing-satellites/
>
> 73 Trevor M5AKA
> ----
> AMSAT-UK http://amsat-uk.org/
> Twitter https://twitter.com/AmsatUK
> Facebook https://facebook.com/AmsatUK
> ----
> _______________________________________________
> 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, 22 May 2015 09:08:02 -0400
From: KE6PPE@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HELP WITH SATPC32
Message-ID: <c3a5c.93559b7.42908432@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
My old computer crashed and I'm installing on a new machine. OS 8.1 .When I
start the program it come up with { OLE-Fehler 8004503A, Class ID: (
A5584957-EF07-419C-BACD-9931F1256D92} , ) . When I click ok it comes up with
{ OLE-Fehler 8004503A, Class ID: ( A5584957-EF07-419C-BACD-9931F1256D92}.
What does this mean?
Larry KE6PPE
------------------------------
Message: 7
Date: Fri, 22 May 2015 09:55:53 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Cc: kang@xxxx.xxx
Subject: [amsat-bb] PSAT Spin Data reported!
Message-ID: <08a2d92e4b1dd30592088eef82de799c@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Got good Spin packets from J
Finally Got spin data from JA0CAW And PY2SDR!
Since we have not yet written any decode software, we will be manually
processing these.
The format is OOOOmm,0z200,XYZXYZXYZXYZXYZXYZ?..XYZ
Where OOOO is the orbit number and mm is the MINUTE (0-to-95) into the
orbit.
0z200 is status, ill do later?
Tha Alphabet soup is the sun vector data over the last minute! In this
case, every 5 seconds, Where the XYZ are the values of the XYZ sun vector.
CAPITAL letters are from +1 to +26 and lower case letters are from -1 to -26
This 4th packet below shows the satellite just coming into sun. What an
amazing coincidence
[07:49:06R]
s#001156,0z200,hCIifHHfIIGHgFHdfIIcHEHHgDIBgIJ0HBHH
s#001157,0z200,gCIeeIHeIJFHdEIAfJIbIFGHeAJDfJJ0HCHH
s#001160,0z200,fbIdfIHcICFIfAIafHH0I0GHfaHCfIIBHaGH
s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK
s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK
Make a scale going positive from 0 to Z and negative from 0 to ?z. Then
for each XYZ set, plot the three points. Then connect the X?s and the Y?s
and the Z?s and we should see a pattern of rotation!
Im starting now. By tte time I finish, a good programmer might beat me to
it!
Bob, WB4APR
------------------------------
Message: 8
Date: Fri, 22 May 2015 16:07:53 +0200
From: Erich Eichmann <erich.eichmann@xxxxxxxx.xx>
To: KE6PPE@xxx.xxxx AMSAT-BB@xxxxx.xxx
Subject: Re: [amsat-bb] HELP WITH SATPC32
Message-ID: <555F3839.9010500@xxxxxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Hello Larry,
the reason could be that no speaker or headphones are plugged into the
computer. Two other users reported the same error message and that was
the reason.
See also the FAQs file on my website www.dk1tb.de, Engl. page "Downloads":
*
k. Ole error 8004503A??*
The SatPC32 voice feature requires the Microsoft Speech SDK (for Windows
XP: SAPI 5.1 ) to be installed on the PC. If it is missing you will get
the aforementioned error message. The SAPI 5.1 could be downloaded for
free from the Microsoft web site:
http://www.microsoft.com/reader/developers/downloads/tts.mspx
Unfortunately this site is no longer available. But you will find other
links, search with the keywords "SAPI 5.1 Download".
Windows 7 and 8 come with the Speech SDK installed. A user got the
errror message under Windows 7, but found the reason: The message
appears if no speakers or headphones are plugged into the computer.
73s Erich, DK1TB
Am 22.05.2015 um 15:08 schrieb KE6PPE--- via AMSAT-BB:
> My old computer crashed and I'm installing on a new machine. OS 8.1 .When I
> start the program it come up with { OLE-Fehler 8004503A, Class ID: (
> A5584957-EF07-419C-BACD-9931F1256D92} , ) . When I click ok it comes up
with
> { OLE-Fehler 8004503A, Class ID: ( A5584957-EF07-419C-BACD-9931F1256D92}.
> What does this mean?
>
> Larry KE6PPE
> _______________________________________________
> 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, 22 May 2015 11:04:00 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT Spin Data reported! now plotted!
Message-ID: <06923c17715372c6b46804c14cbb5b6d@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Spin Data Plotted! 3 RPM perfectly about Z as induced by differential
radiative pressure.
See plot:
http://aprs.org/psat.html
Now to see if it keeps spinning higher or has achieved equilibrium with
eddy current damping?
Bob, WB4APR
*From:* Robert Bruninga [mailto:bruninga@xxxx.xxxx
*Sent:* Friday, May 22, 2015 9:56 AM
*To:* amsat-bb@xxxxx.xxx
*Cc:* bruninga@xxxx.xxxx kang@xxxx.xxx
*Subject:* PSAT Spin Data reported!
Got good Spin packets from J
Finally Got spin data from JA0CAW And PY2SDR!
Since we have not yet written any decode software, we will be manually
processing these.
The format is OOOOmm,0z200,XYZXYZXYZXYZXYZXYZ?..XYZ
Where OOOO is the orbit number and mm is the MINUTE (0-to-95) into the
orbit.
0z200 is status, ill do later?
Tha Alphabet soup is the sun vector data over the last minute! In this
case, every 5 seconds, Where the XYZ are the values of the XYZ sun vector.
CAPITAL letters are from +1 to +26 and lower case letters are from -1 to -26
This 4th packet below shows the satellite just coming into sun. What an
amazing coincidence
[07:49:06R]
s#001156,0z200,hCIifHHfIIGHgFHdfIIcHEHHgDIBgIJ0HBHH
s#001157,0z200,gCIeeIHeIJFHdEIAfJIbIFGHeAJDfJJ0HCHH
s#001160,0z200,fbIdfIHcICFIfAIafHH0I0GHfaHCfIIBHaGH
s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK
s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK
Make a scale going positive from 0 to Z and negative from 0 to ?z. Then
for each XYZ set, plot the three points. Then connect the X?s and the Y?s
and the Z?s and we should see a pattern of rotation!
Im starting now. By tte time I finish, a good programmer might beat me to
it!
Bob, WB4APR
------------------------------
Message: 10
Date: Fri, 22 May 2015 11:50:34 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Receiving PSAT PSK31 FM downlink (Users
Welcome)
Message-ID: <a6d6b5f0400954c62dab52cd4446f49e@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
The Brno University builders of the PSK31 transponder on PSAT have now
authorized user uplinks on 28.120 MHz PSK31 SSB. Downlink FM on 435.350 +/-
5 KHz doppler. Here is the announcement from Brno University:
"We can uplink open to all users. Please, do it." - Mirek OK2AQ
Do NOT operate if PSAT telemetry is below 7.20 volts. Cease operations.
The voltage parameter is the second data field. For example, this morning
the telemetry packet is showing 8.99 volts in the second data field:
T#658,899,072,583,875,854,00011100. The third field is current (here
showing 72 mA so Transponder is off. When PSK is on, then current goes to
over 300 mA)
We'd like to get some packets in the DARK showing battery voltage while not
charging?
Enjoy
Bob Bruninga, WB4APR
-----Original Message-----
Sent: Thursday, May 21, 2015 7:20 PM
Subject: Receiving PSAT PSK31 FM downlink
Receiving the PSAT (and BRICsat) 435.350 MHz FM downlink is as simple as
placing your PSK31 laptop microphone next to the speaker on your FM
satellite UHF receiver and just watching the waterfall.
What you see is exactly what everyone else sees (its FM). There is no
Doppler added to the tones due to your station's position relative to the
satellite. But you DO have to retune your FM radio at least 3 times during
the pass (+5 KHz, 0, -5 KHz) to stay in the FM passband.
User uplinks, however, will shift in the waterfall according to each user's
position relative to the satellite. The shift can be as low as 1 Hz per
second to as high as 6 Hz per second. This is because the uplink is on 10
meters where the Doppler rate is only 1/15th of what it would be on UHF.
The TELEMETRY channel at 315 Hz (PSAT) or 375 Hz (BRICsat) is FIXED with no
Doppler since it is generated onboard into the FM downlink
WHAT TO DO:
1) We will need PSK31 authors to open the PSK31 frequency tracking to
accommodate more than 1 Hz per second Doppler tracking. Current
implementations can do 1 Hz/s but completely fail at 3 Hz/s. 2 Hz/s might
work a little...
2) Until then, ANY uplink user that is in line with a direct overhead pass
will have minimum Doppler at the start and end of his pass (1 Hz/sec) when
the satellite is going right at him and directly away from him. (Though it
will be MAX (6Hz/sec) when it passes over his station).
3) Just turn on MULTI CHANNEL window and let the PSK31 decode everyone.
The ones with the least Doppler at any instant may be decoded for a while!
USERS can transmit later when BRNO University says it has completed its
tests. Brno provided the transponders for use in the PSAT and BRICsat
satellites.
So start preparing your station to TX PSK31 on 10 meters SSB and to receive
the audio from an FM UHF rig on 435.350 +/- 5 KHz steps of Doppler.
DOWNLINK Limitations: The UHF downlink signal is only 300 mW and so a UHF
beam is needed on the downlink.
UPLINK RESTRICTIONS: *NOTHING MORE THAN* a Vertical 1/4 wave or Dipole is
authorized on the 10m uplink and no more than 25 Watts (for now).
Remember a 1/4 wave vertical is the ideal antenna because it maximizes the
signal at lower angles and tapers the signal as the satellite gets closer.
This keeps user uplinks about the same during a pass. Strong stations just
drive down the AGC and ruin it for everyone.
Use minimum power!! Remember, this is crossband FULL DUPLEX so you can see
yourself in the downlink just like everyone else can see you. Act
accordingly. And of course DO NOT TRANSMIT if you cannot see the waterfall
... Duh!
Enjoy!
Bob, WB4APR
------------------------------
Message: 11
Date: Fri, 22 May 2015 12:56:29 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] PSAT downlink now showing on FINDU.COM
Message-ID: <9c7fb1b7b19a41bdd190dc42c9b6bb04@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
PSAT now on FINDU.COM:
Steve Dimse, K4HG author of FINDU.COM has now added PSAT packets to the
original (now going on 14
years) PCSAT Downlink data page. So now packets injected by volunteer
ground stations around the world into the APRS-IS (internet system) are
being captured there.
See http://pcsat.aprs.org
Thanks Steve!
Bob, Wb4APR
------------------------------
Message: 12
Date: Fri, 22 May 2015 13:07:12 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] PSK-31 Author ideas
Message-ID: <2d2bf089dc5723c79a9a0394101c7909@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
PSK31 authors:
Peter Martinez G3PLX, original author of PSK31 reminds me that the ideal
Satellite PSK31 decoder would take advantage of the full-duplex links and
simply have the user click on his own signal in the downlink and then his
own softwar would AFC his uplink based on his downlink. Thus everyone
remains locked in place in the waterfall!
Bob, WB4APR
-----Original Message-----
From: Peter Martinez [mailto:peter.martinez@xxxxxxxxxx.xxxx
Subject: Re: Receiving PSAT PSK31 FM downlink (Users Welcome)
Bob:
In addition (or instead of?) urging PSK31 software authors to widen-out the
AFC on receive, it would be far better in the long term to get these authors
to include the ability to AFC the users uplink transmit frequency to null
the Doppler drift on the user's reception of his own signal in the downlink
baseband. This will eliminate the risk of multiple uplink signals from
different directions drifting across each other, and opens up the
possibilities for many new techniques such as unattended reception (in the
same way that unattended reception of the tepemetry is possble now).
ModernPSK31 programs should have no difficulty letting the user spot his own
signal in the waterfall with a special mouse-click and applying the AFC to
the transmit audio tone while the program is running full duplex. The
multiple-receive features on these moderm programs can then be used to work
full duplex QSOs, with the user leaving his transmit signal keyed-on during
the whole pass.
Similarly, modern PSK31 programs should be able to measure the mean received
SNR of one's-own downlink signal and adjust the transmit tone amplitude to
keep the SNR to a reasonable level, say 14dB. I have these two features
working on my own software today but this program is not sufficiently well
written that I am prepared to make it available on a wide distribution,
although program developers are welcome to have a copy to play with,
including the source code.
73
Peter
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
To: "Miroslav Kasal" <kasal@xxxx.xxxxx.xx>; "Peter Martinez"
<peter.martinez@xxxxxxxxxx.xxx>; "Urbanec Tom??" <urbanec@xxxx.xxxxx.xx>;
"Petr Vagner" <petrv81@xxxxx.xxx>
Cc: <bruninga@xxxx.xxx>
Sent: Friday, May 22, 2015 3:55 PM
Subject: FW: Receiving PSAT PSK31 FM downlink (Users Welcome)
> PSK31 team. How many of you are on AMSAT-BB?
> I am making many posts about PSAT there, and have very little time
> (Personal, work, and family crises)... So can I assume you see all
> copies there? If one of you is on AMSAT-BB, then you can forward to
> others anything about PSAT? Here is the announcement.
>
> Bob
> -----Original Message-----
> From: Robert Bruninga [mailto:bruninga@xxxx.xxxx
> Sent: Friday, May 22, 2015 11:51 AM
> To: amsat-bb@xxxxx.xxx
> Subject: RE: Receiving PSAT PSK31 FM downlink (Users Welcome)
>
> The Brno University builders of the PSK31 transponder on PSAT have now
> authorized user uplinks on 28.120 MHz PSK31 SSB. Downlink FM on
> 435.350
> +/-
> 5 KHz doppler. Here is the announcement from Brno University:
>
> "We can uplink open to all users. Please, do it." - Mirek OK2AQ
>
> Do NOT operate if PSAT telemetry is below 7.20 volts. Cease operations.
> The voltage parameter is the second data field. For example, this
> morning the telemetry packet is showing 8.99 volts in the second data
> field:
> T#658,899,072,583,875,854,00011100. The third field is current (here
> showing 72 mA so Transponder is off. When PSK is on, then current
> goes to over 300 mA)
>
> We'd like to get some packets in the DARK showing battery voltage
> while not charging?
>
> Enjoy
> Bob Bruninga, WB4APR
>
> -----Original Message-----
> Sent: Thursday, May 21, 2015 7:20 PM
> Subject: Receiving PSAT PSK31 FM downlink
>
> Receiving the PSAT (and BRICsat) 435.350 MHz FM downlink is as simple
> as placing your PSK31 laptop microphone next to the speaker on your
> FM satellite UHF receiver and just watching the waterfall.
>
> What you see is exactly what everyone else sees (its FM). There is no
> Doppler added to the tones due to your station's position relative to
> the satellite. But you DO have to retune your FM radio at least 3
> times during the pass (+5 KHz, 0, -5 KHz) to stay in the FM passband.
>
> User uplinks, however, will shift in the waterfall according to each
> user's position relative to the satellite. The shift can be as low as
> 1 Hz per second to as high as 6 Hz per second. This is because the
> uplink is on 10 meters where the Doppler rate is only 1/15th of what
> it would be on UHF.
>
> The TELEMETRY channel at 315 Hz (PSAT) or 375 Hz (BRICsat) is FIXED
> with no Doppler since it is generated onboard into the FM downlink
>
> WHAT TO DO:
>
> 1) We will need PSK31 authors to open the PSK31 frequency tracking to
> accommodate more than 1 Hz per second Doppler tracking. Current
> implementations can do 1 Hz/s but completely fail at 3 Hz/s. 2 Hz/s
> might work a little...
>
> 2) Until then, ANY uplink user that is in line with a direct overhead
> pass will have minimum Doppler at the start and end of his pass (1
> Hz/sec) when the satellite is going right at him and directly away
> from him. (Though it will be MAX (6Hz/sec) when it passes over his
> station).
>
> 3) Just turn on MULTI CHANNEL window and let the PSK31 decode everyone.
> The ones with the least Doppler at any instant may be decoded for a while!
>
> USERS can transmit later when BRNO University says it has completed
> its tests. Brno provided the transponders for use in the PSAT and
> BRICsat satellites.
>
> So start preparing your station to TX PSK31 on 10 meters SSB and to
> receive the audio from an FM UHF rig on 435.350 +/- 5 KHz steps of
> Doppler.
>
> DOWNLINK Limitations: The UHF downlink signal is only 300 mW and so a
> UHF beam is needed on the downlink.
>
> UPLINK RESTRICTIONS: *NOTHING MORE THAN* a Vertical 1/4 wave or
> Dipole is authorized on the 10m uplink and no more than 25 Watts (for
> now).
> Remember a 1/4 wave vertical is the ideal antenna because it maximizes
> the signal at lower angles and tapers the signal as the satellite gets
> closer.
> This keeps user uplinks about the same during a pass. Strong
> stations just drive down the AGC and ruin it for everyone.
>
> Use minimum power!! Remember, this is crossband FULL DUPLEX so you
> can see yourself in the downlink just like everyone else can see you.
> Act accordingly. And of course DO NOT TRANSMIT if you cannot see the
> waterfall ... Duh!
>
> Enjoy!
>
> Bob, WB4APR
------------------------------
Message: 13
Date: Fri, 22 May 2015 12:32:15 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: "'Robert Bruninga'" <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Receiving PSAT PSK31 FM downlink (Users
Welcome)
Message-ID: <000001d094b5$3f15d050$bd4170f0$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
SatPC32 users:
This should get you started:
PSAT,435350.0,28120.0,FM,USB,NOR,0,0,PSK31
If the TX update step is greater than 1 Hz, go to the CAT tab. Select and
store 1 Hz for the SSB/
CW interval. Check 10 X for the update speed. I have my usual 10 Hz
selected, and a fast machine, so
I get 1 Hz steps without changing anything.
The downlink should be fine, but the uplink will probably require a bit of
adjustment to match your
rig.
73s,
Alan
WA4SCA
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Robert
Bruninga
<Sent: Friday, May 22, 2015 10:51 AM
<To: amsat-bb@xxxxx.xxx
<Subject: Re: [amsat-bb] Receiving PSAT PSK31 FM downlink (Users Welcome)
<
<The Brno University builders of the PSK31 transponder on PSAT have now
<authorized user uplinks on 28.120 MHz PSK31 SSB. Downlink FM on 435.350 +/-
<5 KHz doppler. Here is the announcement from Brno University:
<
<"We can uplink open to all users. Please, do it." - Mirek OK2AQ
<
<Do NOT operate if PSAT telemetry is below 7.20 volts. Cease operations.
<The voltage parameter is the second data field. For example, this morning
<the telemetry packet is showing 8.99 volts in the second data field:
<T#658,899,072,583,875,854,00011100. The third field is current (here
<showing 72 mA so Transponder is off. When PSK is on, then current goes to
<over 300 mA)
<
<We'd like to get some packets in the DARK showing battery voltage while not
<charging?
<
<Enjoy
<Bob Bruninga, WB4APR
<
<-----Original Message-----
<Sent: Thursday, May 21, 2015 7:20 PM
<Subject: Receiving PSAT PSK31 FM downlink
<
<Receiving the PSAT (and BRICsat) 435.350 MHz FM downlink is as simple as
<placing your PSK31 laptop microphone next to the speaker on your FM
<satellite UHF receiver and just watching the waterfall.
<
<What you see is exactly what everyone else sees (its FM). There is no
<Doppler added to the tones due to your station's position relative to the
<satellite. But you DO have to retune your FM radio at least 3 times during
<the pass (+5 KHz, 0, -5 KHz) to stay in the FM passband.
<
<User uplinks, however, will shift in the waterfall according to each user's
<position relative to the satellite. The shift can be as low as 1 Hz per
<second to as high as 6 Hz per second. This is because the uplink is on 10
<meters where the Doppler rate is only 1/15th of what it would be on UHF.
<
<The TELEMETRY channel at 315 Hz (PSAT) or 375 Hz (BRICsat) is FIXED with no
<Doppler since it is generated onboard into the FM downlink
<
<WHAT TO DO:
<
<1) We will need PSK31 authors to open the PSK31 frequency tracking to
<accommodate more than 1 Hz per second Doppler tracking. Current
<implementations can do 1 Hz/s but completely fail at 3 Hz/s. 2 Hz/s might
<work a little...
<
<2) Until then, ANY uplink user that is in line with a direct overhead pass
<will have minimum Doppler at the start and end of his pass (1 Hz/sec) when
<the satellite is going right at him and directly away from him. (Though it
<will be MAX (6Hz/sec) when it passes over his station).
<
<3) Just turn on MULTI CHANNEL window and let the PSK31 decode everyone.
<The ones with the least Doppler at any instant may be decoded for a while!
<
<USERS can transmit later when BRNO University says it has completed its
<tests. Brno provided the transponders for use in the PSAT and BRICsat
<satellites.
<
<So start preparing your station to TX PSK31 on 10 meters SSB and to receive
<the audio from an FM UHF rig on 435.350 +/- 5 KHz steps of Doppler.
<
<DOWNLINK Limitations: The UHF downlink signal is only 300 mW and so a UHF
<beam is needed on the downlink.
<
<UPLINK RESTRICTIONS: *NOTHING MORE THAN* a Vertical 1/4 wave or Dipole is
<authorized on the 10m uplink and no more than 25 Watts (for now).
<Remember a 1/4 wave vertical is the ideal antenna because it maximizes the
<signal at lower angles and tapers the signal as the satellite gets closer.
<This keeps user uplinks about the same during a pass. Strong stations just
<drive down the AGC and ruin it for everyone.
<
<Use minimum power!! Remember, this is crossband FULL DUPLEX so you can see
<yourself in the downlink just like everyone else can see you. Act
<accordingly. And of course DO NOT TRANSMIT if you cannot see the waterfall
<... Duh!
<
<Enjoy!
<
<Bob, WB4APR
<_______________________________________________
<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
------------------------------
Subject: Digest Footer
_______________________________________________
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 member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 143
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