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CX2SA > SATDIG 21.08.11 14:15l 849 Lines 26701 Bytes #999 (0) @ WW
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Today's Topics:
1. FUNcube received ARISSAT stereo I/Q recording for SDR
(Bernard f6bvp)
2. HamSpeak - SatSpeak (Thomas Doyle)
3. Re: Hamspeak - Satspeak (Mike Schaffer)
4. 2 to 10 meter converter (Richard Lawn)
5. ARISSat-1 voice telemetry 00:27z 8/21/11 (Greg D.)
6. Re: Turn off AGC when receiving BPSK-1000 (Phil Karn)
7. ANS-233 AMSAT Weekly Bulletins (Lee McLamb)
8. Arissat-1 Comic (Kevin Deane)
9. ARISSat-1 Voice Telemetry 02:01z 8/21/2011 CM98 (Greg D.)
10. EduSat active? (Giulio P. AOL)
11. I heard it! (Was frustrated!) (Burns Fisher)
12. ARISSat-1 Pass In DO33 2011-08-21 @ 0342 UTC (B J)
13. Re: ARISSat telemetry and Doppler tuning (Phil Karn)
14. Flex 5000 (Nick Pugh K5QXJ)
15. Re: Flex 5000 (Alan P. Biddle)
----------------------------------------------------------------------
Message: 1
Date: Sat, 20 Aug 2011 21:13:08 +0200
From: Bernard f6bvp <f6bvp@xxxx.xx>
To: Charles Scharlau <charles.scharlau@xxxxx.xxx>, Phil Karn
<karn@xxxxxxxx.xxx>
Cc: 'AMSAT-BB' <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] FUNcube received ARISSAT stereo I/Q recording for
SDR
Message-ID: <4E500744.7020708@xxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello,
This was a "proof of concept" i.e. recording under Linux with Audacity,
ARISSAT signal received with an FUNcube dongle.
Signals were weak for the record was performed at the end of the night pass.
wav file can be transferred on an iPad an then read with the very nice
application iSDR.
I will try to do a better recording next time.
The 14MB file can be downloaded from :
http://f6bvp.free.fr/videos/Audacity_FCD_41000_Stereo_16bits_19_08_11_1930UTC.
wav
73 de Bernard, f6bvp
------------------------------
Message: 2
Date: Sat, 20 Aug 2011 14:46:41 -0500
From: Thomas Doyle <tomdoyle1948@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HamSpeak - SatSpeak
Message-ID:
<CAHnRQRLL=V_NCY0+-X6Dk6aXwd0tWRO1P3y3m2TR_Pp9dC5CjQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
QST adds a Hamspeak sidebar to articles to explain some of the jargon in the
article. I feel the need for a SatSpeak sidebar. Today I heard a station
working an FM pileup giving his grid location as "The Lighthouse". I thought
I understood the grid system but "The Lighthouse" is a new one for me.
Perhaps it is another mystery word.
W9KE tom LM 0875
------------------------------
Message: 3
Date: Sat, 20 Aug 2011 13:24:55 -0700 (PDT)
From: Mike Schaffer <daetsort@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Hamspeak - Satspeak
Message-ID:
<1313871895.23453.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Tom:
?
You probably made contact with W2GSB. Here is the message he had
posted on this board earlier.
?
Hello,
I will be operating, as W2GSB,? from the historic Fire Island Lighthouse,
FN30, for the Great South Bay Amateur Radio Club tomorrow, 8-20 and 8-21st,
the first pass will be with SO-50, 16:30 U and all the subsequent FM passes.
A special certificate is available, mail to W2GSB Lighthouse, PO Box 1356,
West Babylon, NY 11704, thank you.? Do not send envelope, club will supply.
73's Pete
WB2OQQ
www.massapequanyweather.com
?
?
73's
Mike Schaffer
KA3JAW
Tampa, Florida
EL87
------------------------------
Message: 4
Date: Sat, 20 Aug 2011 20:02:59 -0400
From: Richard Lawn <rjlawn@xxxxx.xxx>
To: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] 2 to 10 meter converter
Message-ID:
<CADQmrTEAWO=PJ6tMYYjSiiX+Uf_A_EB0FaPD1o9NSCd9QxBZdA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I've been making an effort to downsize a bit a found an old treasure, or it
might be to someone. It is a downconverter made by parks electronics
laboratory in Beaverton, or. Its labeled as Model 144-1 two meter converter.
144 = 28mhz and 145=29mhz. Has a self contained power supply. It is quite
well made and last time I fired it up it worked. Any body want it? I could
send a picture so email me off list.
Rick
W2JAZ
------------------------------
Message: 5
Date: Sat, 20 Aug 2011 17:42:26 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 voice telemetry 00:27z 8/21/11
Message-ID: <BLU133-W13502FC9C1E7CD593DB31BA92C0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hii all,
ARISSAt-1 voice telemetry just now:
00:27z 8/21/2011 received at CM98
MET 42 min
IHU Temp = +30c
Control panel temp = +20c
Battery 3??? (lost to QSB)
Battery current ??? ma
SSTV picture followed (a real one this time, not pre-recorded!), then off.
00:29z 8/21/2011 received at CM98
MET = 45 min
IHU Temp = +31c
Control panel temp = +20c
Battery 35.66v
Battery current -8ma
This was followed by 2 min off, and another voice announcement, children
chanting, and then off again to LOS.
So, a question... Why, when the spacecraft is in full sun, is the battery
current negative? I'm guessing that there some orientations that will not
supply sufficient power for operations. If so, what happens when we lose
the battery altogether? Reset? Or is there a shedding of load first when
the voltage drops?
Greg KO6TH
------------------------------
Message: 6
Date: Sat, 20 Aug 2011 19:10:54 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
To: w5ggw@xxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxxx Gregg Wonderly <w5ggw@xxx.xxx>
Subject: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000
Message-ID: <4E50692E.9030108@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/19/11 7:51 AM, Gregg Wonderly wrote:
> What kind of digital are you suggesting? Voice and data both? A
> digital path from anywhere on the planet to the appropriate ground
> station is easily doable with some "documentation" of the ground stations.
Digital voice would be the easiest to support since the data rate is so
modest. Low rate data (< 100 kb/s) wouldn't be much harder. All it takes
is a stabilized platform with microwave antennas. Any ground station
with an Internet connection could automatically link with the ISS and
relay it to a central point (e.g., Houston) and then hand it off to the
next ground station. One advantage we hams have always had over NASA
itself are our numbers and geographical distribution. We obviously
wouldn't be able to cover the large parts of the earth that are entirely
water but we could still do a pretty good job with the rest.
------------------------------
Message: 7
Date: Sat, 20 Aug 2011 22:13:56 -0400
From: Lee McLamb <ku4os@xxx.xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ANS-233 AMSAT Weekly Bulletins
Message-ID: <68.2C.00666.5E9605E4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="iso-8859-1"; format=flowed
AMSAT NEWS SERVICE
ANS-233
ANS is a free, weekly, news and information service of AMSAT North America,
The
Radio Amateur Satellite Corporation. ANS reports on the activities of a
worldwide group of Amateur Radio operators who share an active interest in
designing, building, launching and communicating through analog and digital
Amateur Radio satellites.
Please send any amateur satellite news or reports to:
ans-editor@xxxxx.xxx
In this edition:
* AMSAT Symposium Banquet Speaker Announced
* AMSAT Fox to Become Fox-1 and Fox-2
* Worked 5 in EM55 Award List Continues to Grow
* FO-29 Reaches 15th Birthday
* BPSK-1000 Test Files and Downlink SDR Passband Recording Available
* NASA Announces Next Opportunity for CubeSat Space Missions
* Time Running Out On The DARA Matching Gift Challenge
* Satellite Shorts From All Over
* ARISS Status - 15 August 2011
SB SAT @ AMSAT $ANS-233.01
AMSAT Symposium Banquet Speaker Announced
AMSAT News Service Bulletin 233.01
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.01
The Symposium committee is pleased to announce that Lance Ginner, K6GSJ has
agreed to be our banquet speaker. 2011 is the 50th anniversary of the first
amateur satellite in space (OSCAR 1) and Lance was part of the team that
developed that satellite.
We are also pleased to announce that Alan Bowker,
WA6DNR has volunteered to take
over the reins for the 2011 AMSAT Symposium in San Jose, CA. Alan was kind
enough to step in for Herb Sullivan, K6QXB who had to resign this week for
personal reasons.
The Symposium and Annual Meeting will be held Nov 4-6 at the Wyndham San Jose
Hotel adjacent to the San Jose airport. See the AMSAT Web site for details,
reservation form and additional information.
[ANS thanks Gould, WA4SXM, for the above information]
SB SAT @ AMSAT $ANS-233.02
AMSAT Fox to Become Fox-1 and Fox-2
AMSAT News Service Bulletin 233.02
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.02
The AMSAT Fox CubeSat project is being split into a complementary
pair of new CubeSats named Fox-1 and Fox-2.
Fox-1 will address the need to quickly develop and launch a replace-
ment for the ailing AO-51. Fox-1 will include an FM transponder pair-
ed with a simple IHU for telemetry and control and fitted to a basic
CubeSat space frame. This small and highly focused set of capabilities
will significantly reduce the time needed for satellite development
and construction allowing for a launch target in the second half of
2013.
The advanced technology, research and development work, started for
the original Fox satellite, will be continued and rolled into Fox-2
including the software defined transponder. With Fox-1 addressing
the immediate need for an AO-51 replacement, Fox-2 will instead be
designed for a linear transponder mission. A linear transponder
requires considerably more power so Fox-2 will also include
an advanced power system and a cutting-edge space frame with deploy-
able solar panels. Fox-2 will have a launch target in the 2015 time
frame.
There are still opportunities for developers interested in working
on these satellites especially in the areas of project management,
systems engineering, thermal and mechanical design, CNC machining,
circuit design, software development, system test and test equipment
development.
If interested, please send email to Tony Monteiro, AA2TX@xxxxx.xxx
[ANS thanks AMSAT Vice-President of Engineering, Tony Monteiro, AA2TX
for the above information]
SB SAT @ AMSAT $ANS-233.03
Worked 5 in EM55 Award List Continues to Grow
AMSAT News Service Bulletin 233.03
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.03
In an effort to help increase interest in satellites, hams in the
Memphis, Tennessee area have created a new award for working five
(5) different hams via satellite in the EM55 grid.
You do not have to be in your home grid to count the stations
worked. There are several satellite ready hams in EM55. Here is
the current list of EM55 based satellite operators that we know
of: WA4NVM, WA4HFN, WB4LHD, WA4OVO, KI4OTG, KD4NOQ, KJ4BIX, AJ4KF,
N4MGT and W5KUB.
Send your log to WA4NVM or WA4HFN for checking, along with your
current mailing address. The award is free and should any der continues to function well.
Recent telemetry received from FO-29 shows:
Operational continuous analog bus voltage: 15 ~ 16.5V
Solar generation current: 1050 ~ 1450mA
Battery Voltage: 16.0 ~ 17.5V
Charging current: 70m ~ 110mA
Transmit Power: 500 ~ 900mW
Assemblies Temperature: 0 ~ 11.5 ?
Battery Temperature: 10.5 ~ 11.5 ?
The linear transponder can be accessed on these frequencies:
Uplink: 146.000 - 145.900 MHz
Downlink: 435.800 - 435.900 MHz
Beacon: 435.795 MHz
The FO-29 Blog is on-line at:
http://blog.goo.ne.jp/fo-29
A google english translation of the blog can be found at:
http://tinyurl.com/FO29Blog
[ANS thanks T.Oguro, JG1KOE on behalf of the FO-29 Control Team
for the above information]
SB SAT @ AMSAT $ANS-233.05
BPSK-1000 Test Files and Downlink SDR Passband Recording Available
AMSAT News Service Bulletin 233.05
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.05
Even if your station does not have a 2 meter SSB receiver capable
of copying the BPSK-1000 telemetry downlinked on 145.920 MHz there
are recorded files allowing you to experiment with the ARISSatTLM
software and Software Defined Radio (SDR) techniques in an off-
line mode.
Download and install ARISSatTLM software from:
http://www.arissattlm.org
The ARISSatTLM Software Quick Start Guide remains available from
the link on the AMSAT front page: http://www.amsat.org. This guide
describes software installation, real-time signal reception, and
playback of recorded BPSK-1000 telemetry files.
AMSAT-DK has made several recordings of the BPSK-1000 beacon with
their OZ7SAT station. Start at:
http://www.amsat.dk/oz7sat/sched.php?gs=oz1kte&sat=ARISSAT-1&status=All
Then select a particular pass and download the recording. The files
are about 65 MB each. Their system starts recording about 90 seconds
before AOS and continues to a bit after LOS as calculated for their
location in Copenhagen. These recordings can be played back using the
ARISSatTLM software (Start Sound Card, Open WAV File).
Additionally, the Morse Code Decoder window in the ARISSatTLM soft-
ware also works on HF. Tune in a CW signal using the Tuning Indica-
tor window. The decoded CW will stream across the Morse Code Decoder
Window.
Recording of Full ARISSat-1/KEDR Downlink Passband Available
------------------------------------------------------------
Mark, N8MH recorded several passes of ARISSat-1 using the Funcube
Dongle (FCD) Software Defined Receiver and the HDSDR program. The
resulting file from a 10 min pass, recording the whole FCD passband,
is about 250MB. Mark posted a file on the AMSAT FTP server at:
http://tinyurl.com/3d87h8l
This file can be played back using the HDSDR software which you can
download from: http://www.hdsdr.de/ Mark's recording was made with NO
correction for Doppler. Aboutube/
Howard, G6LVB, creator of the FUNcube Dongle SDR wrote this week that
he has released a new firmware version to correct a bug in the USB
streaming code which produced clicking every few seconds for some
users. The firmware image is here:
http://www.funcubedongle.com/MyImages/export18i.pro.bin
[ANS thanks the ARISSat-1/KEDR Team for the above information]
SB SAT @ AMSAT $ANS-233.06
NASA Announces Next Opportunity for CubeSat Space Missions
AMSAT News Service Bulletin 233.06
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.06
NASA is seeking proposals for small satellite payloads to fly on
rockets planned to launch between 2012 and 2014. These miniature
spacecraft, known as CubeSats, could be auxiliary payload on pre-
viously planned missions.
CubeSats are a class of research spacecraft called nanosatellites.
The cube-shaped satellites are approximately four inches long,
have a volume of about one quart and weigh less than three pounds.
Proposed CubeSat investigations must be consistent with NASA's Stra-
tegic Plan and the Education Strategic Coordination Framework. The
research should address aspects of science, exploration, technology
development, education or operations.
Applicants must submit proposals electronically by 4:30 p.m. EST on
Nov. 14, 2011. NASA will select the payloads by Jan. 30, 2012. Selec-
tion does not guarantee a launch opportunity. The selected spacecraft
will be eligible for flight after final negotiations when a launch
opportunity arises. NASA will not provide funding for the develop-
ment of the small satellites.
NASA recently announced the results from the second round of the Cube-
Sat Launch Initiative. From the first two launch initiatives, 32 pay-
loads made the short-list for launch opportunities in 2011 and 2012.
They are eligible for launch pending an appropriate opportunity and
final negotiations. The satellites come from 18 states: Alabama, Alaska,
California, Colorado, Hawaii, Kentucky, Louisiana, Maryland, Massachu-
setts, Michigan, Missouri, Montana, New Hampshire, New Mexico, New York,
Pennsylvania, Utah and Virginia.
For additional information about NASA's CubeSat Launch Initiative program,
visit:
http://go.nasa.gov/puk9K2
http://go.nasa.gov/CubeSatOp
[ANS thanks NASA Education Express - Aug. 11, 2011 for the above
information]
SB SAT @ AMSAT $ANS-233.07
Time Running Out On The DARA Matching Gift Challenge
AMSAT News Service Bulletin 233.07
From AMSAT HQ SILVER SPRING, MD.
August 21, 2011
To All RADIO AMATEURS
BID: $ANS-233.07
Donate to AMSAT and DARA will contribute matching funds. The Dayton
Amateur Radio Association (DARA) fund raising challenge for AMSAT
continues until September 1, 2011. DARA will match $1.00 for every
$3.00 donated up to $5,000.00.
AMSAT kicked off the freceived the sad news that Mark Austin, KB1GVR, became a
silent key on August 8. Graveside services were held on August 18
in Ellsworth, Maine. Mark's obituary can be read on-line at:
http://tinyurl.com/3bcrkg4 (BangorDailyNews.com)
+ Dove OSCAR 17 video - January 22, 1990, saw the launch of the DOVE
Amateur Radio satellite sponsored by AMSAT-Brazil and lead by Dr.
Junior Torres DeCastro, PY2BJO. DOVE, an acronym for Digital Orbit-
ing Voice Encoder, carried hardware capable of reproducing digitized
speech, or controlling a Votrax speech synthesizer and transmitted
AX.25 packet on 145.825 MHz. Watch the video, showing historic still
pictures of DOVE: http://tinyurl.com/3o87x4f (Southgate ARC)
+ P-POD grows up: A 6U Canisterized Satellite Dispenser was displayed
at the recent Small Satellites conference that will allow larger
CubeSats to be deployed. Traditionally much smaller P-POD's (Poly
Picosatellite Orbital Deployer) have been used to deploy CubeSats.
The 6U CSD standard allows CubeSats up to 12 x 24 x 36 cm weighing
12Kg to be deployed and is shown in a video:
http://tinyurl.com/3hjmrmf (Southgate ARC)
+ UniverseToday posted STS-135 Redux: Launch Tribute Video at:
http://www.universetoday.com/88183/sts-135-redux-launch-tribute-video/
+ AMSAT's Keeper of the Keps, Ray Hoad, WA5QGD reported this week that
ARISSat-1 has been added to the KEP distrioshi Furukawa, KE5DAW on the ISS, receiving
answers to ten of their questions
about space. The contact was integrated into the CYSF which included lectures,
field trips, projects and debates that promoted science, technology and
innovation. The forum hosted 250 students this year from 6 countries. Newsday
reported on the contact: http://www.newsday.co.tt/news/0,145262.html
2. Italian Camp Contacts ISS
A successful Amateur Radio on the International Space Station (ARISS) contact
was held between on-orbit astronaut Ron Garan, KF5GPO and the Youth Hostel ?La
Foresta? in Perugia, Italy on Thursday, August 11 via station K6DUE in
Greenbelt, Maryland. Garan fielded 18 questions posed to him by the children.
The camp, organized by Panda Adventure in cooperation with ESA /ESRIN, focuses
on space education and provides activities such as field researches,
experiments, use of technical instruments, and games to explore the Earth and
Sky.
3. ARISS-U.S. Reviews Proposals
The NASA Teaching From Space Office received over 100 inquiries about the
U.S.
proposal process for ARISS contacts that will be scheduled during the
January ?
July 2012 time frame. Twenty-four schools met the
July 15 deadline and submitted
proposals. The U.S. Selection Committee is
currently reviewing the proposals and
will select U.S. schools by the end of the
month. Another window of opportunity
for U.S. schools and organizations too AMSAT Project
Funds, will be eligible to receive additional benefits. Application forms are
available from the AMSAT Office.
73,
This week's ANS Editor,
Lee McLamb, KU4OS
ku4os at amsat dot org
------------------------------
Message: 8
Date: Sat, 20 Aug 2011 19:22:36 -0700
From: Kevin Deane <summit496@xxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Arissat-1 Comic
Message-ID: <COL107-W18B81B5E1E5EF2E9F1B7C8832C0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
By request a new comic is on my QRZ page for veiwing...
Kevin
KF7MYK
------------------------------
Message: 9
Date: Sat, 20 Aug 2011 19:26:31 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Voice Telemetry 02:01z 8/21/2011 CM98
Message-ID: <BLU133-W192BCDF7B94EE26D6D6DC2A92C0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Wow, a nearly overhead pass, apparently mostly in high power mode (a first
here at KO6TH)
02:01z 8/21/2011 as received in CM98
Voice announcement (possibly Chinese or similar)
Telemetry:
MET = 45 min
IHU Temp = +33c
Control panel temp = +21c
Battery = 35.70v
Current = ?? (QSB)
Voice announcement (English)
Canned SSTV picture
More voice (Spanish, I believe)
02:04 telemetry
MET = 47
IHU Temp = +34c
Control panel temp = +22c
Battery = 35.85v
Current = -12ma
more voice (Spanish, reference to Puerto Rico?)
Live SSTV
More Spanish
Telemetry
MET = 49
IHU temp = +34c
Control panel temp = +22c
Battery = 35.78v
Current = -20ma
English announcement
Voice (Chinese?)
Live SSTV picture
English announcement
Telemetry
MET = 51
IHU temp = +35c
Control panel temp = +23c
Battery = 35.90v
Current = -20ma
At this point the satellite turned off for the first time during the pass.
Then LOS.
Great pass, but why did it turn off?
Greg KO6TH
------------------------------
Message: 10
Date: Sat, 20 Aug 2011 23:05:28 -0400 (EDT)
From: "Giulio P. AOL" <giuliop70@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] EduSat active?
Message-ID: <8CE2DC6509CF386-1D78-CE44@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi to everyboby , are there any news/reports about reception of EDUSAT ?
Thanks
Giulio AB2VY
------------------------------
Message: 11
Date: Sat, 20 Aug 2011 23:55:47 -0400
From: Burns Fisher <burns@xxxxxx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] I heard it! (Was frustrated!)
Message-ID:
<CABX7KxXHfzbzOAB8wNGcwpwD_YqT8XyH54Kg7tzctx0HLZ8-Eg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Thanks to everyone for the encouragement. Tonight for the 7PM pass of
ARISSat I went up on a hill where I had a good view of the horizon, taking
my F6a and a slightly-betteman, I guess that means it is reading the SD card
again...or is that just for the messages?
I'm wondering whether the direct-overhead time that I heard nothing the
bird's antenna was actually pointing away. Has anyone had any estimates of
how fast it is tumbling now?
Anyway, I know now that my radio can do it. Next I have to mange to get a
better signal to it.
Thanks again!
Burns, W2BFJ
------------------------------
Message: 12
Date: Sun, 21 Aug 2011 04:34:31 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Pass In DO33 2011-08-21 @ 0342 UTC
Message-ID:
<CAP7QzkNBSwycqqs+nPXFozgf7M7-rG+dOyATrLyNj42K=sGUgQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The FM telemetry signal was acquired at 0342. The following was heard:
- End of ID ("...01S")
- Speech in unknown language
- MET = 54 minutes
- IHU temp. = +34 deg. C
- Control panel temp. = +24 deg. C
- Battery voltage = +35.54 V
- Battery current = -20 mA
- ID
- Speech in another unknown language
- Tones (SSTV?)
Reception ended at 0345. The signal was generally clear with strength of at
least S7.
73s
Bernhard VA6BMJ
------------------------------
Message: 13
Date: Sun, 21 Aug 2011 00:01:04 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
To: "Ronald G. Parsons" <w5rkn@xxxxx.xxx>
Cc: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat telemetry and Doppler tuning
Message-ID: <4E50AD30.7060406@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/20/11 6:40 AM, Ronald G. Parsons wrote:
>
> With these two changes, although the Doppler correction may drift off,
> it does so very smoothly, which I assume allows the decoding of the BPSK
> data to be more accurate.
Yes, the closer you keep it the better it'll work. Errors of up to +/-
50 Hz are fairly negligible, but beyond that it starts to degrade. The
demodulator searches +/- 200 Hz in 100 Hz steps around a nominal carrier
frequency of 1500 Hz. I should probably have made it search a wider
range but with that much mistuning the sidebands would start to be
clipped off by the edges of a typical SSB filter.
------------------------------
Message: 14
Date: Sun, 21 Aug 2011 04:39:00 -0500
From: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>
To: "'AMSAT BB'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Flex 5000
Message-ID: <008001cc5fe6$28541e60$78fc5b20$@xxx>
Content-Type: text/plain; charset="us-ascii"
I am struggling to get my Flex 5000 and satpc32 to work. Has anyone on the
list been able to get this combination to get the performance we get with
the vintage radios? My best success has come with version 2.0.2.2 . The
latest release Friday make thing worse.
Thanks
nick
Office 337 593 8700
Cell 337 258 2527
Helping UL become a world Class Engineed
downlink on 20 meters. I select that first, and then the new satellite. It
is faster, slightly, than clearing the error messages and restarting RX2.
Flex has a bug report on this, and I talked with one of their people at the
Huntsville Hamfest yesterday.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Nick Pugh K5QXJ
Sent: Sunday, August 21, 2011 4:39 AM
To: 'AMSAT BB'
Subject: [amsat-bb] Flex 5000
I am struggling to get my Flex 5000 and satpc32 to work. Has anyone on the
list been able to get this combination to get the performance we get with
the vintage radios? My best success has come with version 2.0.2.2 . The
latest release Friday make thing worse.
Thanks
nick
Office 337 593 8700
Cell 337 258 2527
Helping UL become a world Class Engineering and Educational School
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Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
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End of AMSAT-BB Digest, Vol 6, Issue 480
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