| |
CX2SA > SATDIG 10.10.11 21:12l 1011 Lines 34714 Bytes #999 (0) @ WW
BID : AMSATBB6559
Read: GUEST
Subj: AMSAT-BB-digest V6 559
Path: IZ3LSV<9A0BBS<VE2PKT<F1BBI<CX2SA
Sent: 111010/1904Z @:CX2SA.LAV.URY.SA #:31726 [Minas] FBB7.00e $:AMSATBB6559
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. ARRISAT Certificate (James Luhn)
2. Re: ARRISAT Certificate (Dee)
3. Boy Scouts Jamboree on the Air 10/15 - 10/16 (George Henry)
4. Re: KickSat - a personal spacecraft of your own in space
(JoAnne Maenpaa)
5. Re: KickSat - a personal spacecraft of your own in space
(Jeff Moore)
6. SRMSAT Keps and Down Link Details (Dinesh Cyanam)
7. Re: KickSat - a personal spacecraft of your own in space
(George Henry)
8. Re: SRMSAT Keps and Down Link Details (Andrew Glasbrenner)
9. Re: KickSat - a personal spacecraft of your own in space
(JoAnne Maenpaa)
----------------------------------------------------------------------
Message: 1
Date: Sun, 09 Oct 2011 15:21:21 -0500
From: James Luhn <luhn@xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARRISAT Certificate
Message-ID: <4E920241.6000600@xx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Please do not spam me for asking about a ARRISAT reception certificate
as I am in no hurry and I know all concerned are special and appreciated
volunteers. On August 10 I sent in a reception report along with a
recording of the audio. Should I have received a certificate by now?
Perhaps I should resend my report. I am so excited to have received the
satellite. A certificate would be nice to have but reception is what
really counts. A big thank you to all involved.
73,
-james
W5AOO
------------------------------
Message: 2
Date: Sun, 09 Oct 2011 16:34:30 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
To: "'James Luhn'" <luhn@xx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: ARRISAT Certificate
Message-ID: <000a01cc86c2$d8fdf080$8af9d180$@xxxxxxxxx.xxx>
James,
Where did you send the report to? Was it a telemetry report?
SSTV report? Audio report? I am checking now to see if your
report was acted upon-will advise.
73,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx
[mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of James Luhn
Sent: Sunday, October 09, 2011 4:21 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARRISAT Certificate
Please do not spam me for asking about a ARRISAT reception
certificate as I am in no hurry and I know all concerned are
special and appreciated volunteers. On August 10 I sent in a
reception report along with a recording of the audio. Should
I have received a certificate by now?
Perhaps I should resend my report. I am so excited to have
received the satellite. A certificate would be nice to have
but reception is what really counts. A big thank you to all
involved.
73,
-james
W5AOO
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 3
Date: Sun, 9 Oct 2011 14:41:08 -0700 (PDT)
From: George Henry <ka3hsw@xxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Boy Scouts Jamboree on the Air 10/15 - 10/16
Message-ID: <1318196468.53083.YahooMailRC@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
On Saturday, October 15th, I will be on the satellites as WA9BSA from the
Three
Fires Council (Illinois) Camporall for Jamboree on the Air.? I plan to try all
workable passes of the FM and linear sats, between 1400Z and 2200Z (if set
up in
time, I may start even earlier), using both an HT and my 910H (QRP) with an
Arrow antenna.? The scouts will participate by holding & aiming the antenna,
logging, and may even make some contacts (although in the past, they've been
pretty mic-shy).
More than 5000 scouts?have registered for the Camporall, and we anticipate
several hundred passing thru the amateur radio demo area throughout the
day.? In
addition to the satellites, we will have HF stations operating on several of
the
published JOTA frequencies, +/- QRM? (see
http://www.scouting.org/jota/operators_guides.aspx), and will attempt a sked
with the World Scout Bureau station in Geneva, Switzerland.?
Be sure to give JOTA stations a chance on the birds this coming weekend!
73,
George, KA3HSW
------------------------------
Message: 4
Date: Mon, 10 Oct 2011 09:29:21 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: "'Bill Ress'" <bill@xxxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in
space
Message-ID: <000f01cc8759$0129d6a0$037d83e0$@xxx>
Content-Type: text/plain; charset="us-ascii"
> Will each Sprite have it's own frequency?
>
> Since these Sprites are operating in the Amateur satellite
> bands, how will you license them? How will you handle the
> frequency coordination of these transmitters?
The information that Zac and his team provided to AMSAT News Service in May,
2011 reported that the Sprite prototypes that were deployed on the ISS
operated with 10 milliwatts of RF power at 902 MHz using MSK modulation
(minimum-shift keying) with a chipping rate of 50 kbps.
Copy of original release below ...
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
SB SAT @ AMSAT $ANS-149.03
Cornell University Chip Satellite Team Invites Ham Radio Collaboration
AMSAT News Service Bulletin 149.03
From AMSAT HQ SILVER SPRING, MD.
May 29, 2011
To All RADIO AMATEURS
BID: $ANS-149.03
Cornell University Chip Satellite Team Invites Ham Radio Collaboration
A group of Cornell University-developed, fingernail-sized satellites
may travel to Saturn within the next decade, and as they flutter down
through its atmosphere, they will collect data about chemistry, radia-
tion and particle impacts.
Three prototypes of these chip satellites, named "Sprite," were mount-
ed on the International Space Station during a recent spacewalk. The
thin, 1-inch-square chips are mounted to the external Materials
International Space Station Experiment (MISSE-8) pallet, exposing them
to the harsh conditions of space to see how they hold up and transmit
data.
Zac Manchester at Cornell University explained that the chips transmit
as beacons with 10 milliwatts of RF power at 902 MHz using MSK modu-
lation (minimum-shift keying) with a chipping rate of 50 kbps. The
Cornell team invites AMSAT satellite operators to collaborate with this
experiment to determine conditions in which the low-power signal has
been detected on the ground.
The Cornell ground station consists of a 18 dBi yagi with a GNU Radio
and USRP receiver (http://www.ettus.com/products). A significant
challenge is that the MISSE-8 pallet the chips are on is mounted on
the anti-nadir side of the space station, facing away from the earth.
The team is hoping to be lucky to catch some kind of reflection off
the ISS structure.
Beyond being able to detect the signal on Earth, decoding the
message requires signal processing. The chips all transmit on the same
frequency, each with it's own PRN code. The Cornell team uses these
codes to differentiate each one, as well as to provide signal proces-
sing gain. At Cornell, data is being recorded and post-processed with
a standard PC.
To track these chip satellites just use the ISS keplerian elements
because they are mounted on the space station.
Mason Peck, Associate Professor Mechanical and Aerospace Engineering
at Cornell University wrote, "Receiving the full sequence of data per
se is not of interest, but the mere reception of it (a single digital
bit, for us), indicates successful transmission. If you would like to
serve as one of the lucky few to try detecting this signal, please
follow up with Zac Manchester (zrm3@xxxxxxx.xxxx. We definitely welcome
the collaboration of HAM operators."
More information be found at these sources:
http://tinyurl.com/3fs5ks7 (spacemart.com)
http://www.spacecraftresearch.com/blog
[ANS thanks Zac Manchester and Mason Peck at Cornell University for
the above information]
------------------------------
Message: 5
Date: Mon, 10 Oct 2011 10:31:26 -0700
From: "Jeff Moore" <tnetcenter@xxxxx.xxx>
To: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>, "'Bill Ress'"
<bill@xxxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in
space
Message-ID: <5FE011F6EA0446B3BB38414B115E5A81@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I asked a similar question on their website, the response was that the
sprites would all be on the same frequency. Their website says they will
operate between 433 and 436 MHz.
Jeff Moore -- KE7ACY
CN94
----- Original Message -----
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: "'Bill Ress'" <bill@xxxxxxxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Monday, October 10, 2011 7:29 AM
Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in space
> Will each Sprite have it's own frequency?
>
> Since these Sprites are operating in the Amateur satellite
> bands, how will you license them? How will you handle the
> frequency coordination of these transmitters?
The information that Zac and his team provided to AMSAT News Service in May,
2011 reported that the Sprite prototypes that were deployed on the ISS
operated with 10 milliwatts of RF power at 902 MHz using MSK modulation
(minimum-shift keying) with a chipping rate of 50 kbps.
Copy of original release below ...
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
SB SAT @ AMSAT $ANS-149.03
Cornell University Chip Satellite Team Invites Ham Radio Collaboration
AMSAT News Service Bulletin 149.03
From AMSAT HQ SILVER SPRING, MD.
May 29, 2011
To All RADIO AMATEURS
BID: $ANS-149.03
Cornell University Chip Satellite Team Invites Ham Radio Collaboration
A group of Cornell University-developed, fingernail-sized satellites
may travel to Saturn within the next decade, and as they flutter down
through its atmosphere, they will collect data about chemistry, radia-
tion and particle impacts.
Three prototypes of these chip satellites, named "Sprite," were mount-
ed on the International Space Station during a recent spacewalk. The
thin, 1-inch-square chips are mounted to the external Materials
International Space Station Experiment (MISSE-8) pallet, exposing them
to the harsh conditions of space to see how they hold up and transmit
data.
Zac Manchester at Cornell University explained that the chips transmit
as beacons with 10 milliwatts of RF power at 902 MHz using MSK modu-
lation (minimum-shift keying) with a chipping rate of 50 kbps. The
Cornell team invites AMSAT satellite operators to collaborate with this
experiment to determine conditions in which the low-power signal has
been detected on the ground.
The Cornell ground station consists of a 18 dBi yagi with a GNU Radio
and USRP receiver (http://www.ettus.com/products). A significant
challenge is that the MISSE-8 pallet the chips are on is mounted on
the anti-nadir side of the space station, facing away from the earth.
The team is hoping to be lucky to catch some kind of reflection off
the ISS structure.
Beyond being able to detect the signal on Earth, decoding the
message requires signal processing. The chips all transmit on the same
frequency, each with it's own PRN code. The Cornell team uses these
codes to differentiate each one, as well as to provide signal proces-
sing gain. At Cornell, data is being recorded and post-processed with
a standard PC.
To track these chip satellites just use the ISS keplerian elements
because they are mounted on the space station.
Mason Peck, Associate Professor Mechanical and Aerospace Engineering
at Cornell University wrote, "Receiving the full sequence of data per
se is not of interest, but the mere reception of it (a single digital
bit, for us), indicates successful transmission. If you would like to
serve as one of the lucky few to try detecting this signal, please
follow up with Zac Manchester (zrm3@xxxxxxx.xxxx. We definitely welcome
the collaboration of HAM operators."
More information be found at these sources:
http://tinyurl.com/3fs5ks7 (spacemart.com)
http://www.spacecraftresearch.com/blog
[ANS thanks Zac Manchester and Mason Peck at Cornell University for
the above information]
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 6
Date: Mon, 10 Oct 2011 13:43:19 -0400
From: Dinesh Cyanam <dinesh@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] SRMSAT Keps and Down Link Details
Message-ID: <76DCF359-046E-486D-87C4-262ABCCE7E98@xxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
SRMSAT, A cubesat developed by the students of SRM University, India will be
launched on October 12th, 2011 along with the Megha Tropique satellite on
the PSLV-C18 launch vehicle from ISRO's spaceport in Sriharikota, India.
Payload Details:
SRMSAT will monitor the green house gases in near infrared region (900nm -
1700nm).
Launch Date and Time:
October 12, 2011
0530 hrs UTC
Telemetry down link and CW beacon on the same frequency: 437.425 MHz (10 dbm)
(Telemetry decoding info will be posted soon)
Preliminary TLEs from ISTRAC (ISRO Telemetry, Tracking and Command Network):
SRM
1 99999U 11072A 11278.34967500 .00001077 00000-0 60876-3 0 1233
2 99999 20.0603 97.4017 0010015 338.6461 208.4324 14.09199968 14
Website: http://srmsat.in
All Radio Amateurs are requested to track SRMSAT and provide us with the
reception reports via AMSAT-BB mailing list or via email to KC2YQJ <at>
arrl.net
73
KC2YQJ
Dinesh Cyanam
Quoting, amsat-bb-request@xxxxx.xxxx
> SB SAT @ AMSAT $ANS-282.06
> India CubeSats For Launch on October 12
>
> AMSAT News Service Bulletin 282.06
> From AMSAT HQ SILVER SPRING, MD.
> October 9, 2011
> To All RADIO AMATEURS
> BID: $ANS-282.06
>
> India CubeSats For Launch on October 12
>
> Two university cubesats JUGNU and SRMSAT are ready for launch from
> ISRO's spaceport, Sriharikota, India on October 12.
>
> JUGNU was developed by a team of students and faculty at IIT Kanpur
> and ISRO scientists to launch India's first Nano Satellite. The
> satellite's mission includes:
>
> 1. Micro Imaging System
> 2. GPS receiver for locating the position of satellite in the orbit
> 3. MEMS based IMU (Inertial Measurement Unit)
>
> Jugnu Frequencies:
> CW Beacon - 437.275 (17dbm)
> Pay load - 437.505
>
> At press time no further information was available for SRMSAT other
> than its payload down link and CW Beacon will transmit on 437.425 MHz
> (10dbm)
>
> [ANS thanks Dinesh Cyanam, KC2YQJ; Sanjay Srikanth Nekkanti, AB3OE
> and Mani, VU2WMY for the above information]
>
> /EX
>
> SB SAT @ AMSAT $ANS-282.07
> ARISS Status - 3 October 2011
>
> AMSAT News Service Bulletin 282.07
> From AMSAT HQ SILVER SPRING, MD.
> October 9, 2011
> To All RADIO AMATEURS
> BID: $ANS-282.07
>
>
> 1. School Contacts
>
> S. K. Sri Hartamas, Kuala Lumpur, Malaysia scheduled for an Amateur
> Radio on
> the International Space Station (ARISS) contact on Monday, October 3 at
> 14:46
> UTC. Was successful. The school has been invited by the National Space
> Agency
> Satellite Ground Station (call sign 9M2RPN) to participate in the ?Prime
> Minister?s
> National Space Challenge Trophy 2011,? which has been an annual event
> since
> 2007, when Malaysian space participant, Dr. Sheikh Muszaphar Shukor,
> flew to
> the ISS. The National Space Challenge involves a large number of
> students and
> encourages them to learn about space. The event receives extensive media
> coverage from newspapers, radio and television.
>
> George Observatory, Needville, Texas scheduled for an Amateur Radio on
> the
> International Space Station (ARISS) contact on Saturday, October 8 at
> 16:50 UTC
> via telebridge station WH6PN in Hawaii has been completed. Astronomy
> Day is
> put on each year by all the Astronomy clubs in the greater Houston area
> in
> conjunction with the Houston Museum of Natural Science. The event is
> held at
> the George Observatory in Brazos Bend State Park and draws 4000
> attendees
> each year. The ARRL (American Radio Relay League) education and
> technology
> program will be used to prepare youth for the contact. A NASA booth
> will be
> set up and amateur astronomers and amateur radio operators will be
> available
> to discuss the ISS, space travel and forms of communication.
>
> 2. Lompoc High School Students Experience ARISS Contact
>
> On Thursday, September 29, students attending Lompoc High School in
> Lompoc,
> California connected with on-orbit astronaut Mike Fossum, KF5AQG via an
> Amateur Radio on the International Space Station (ARISS) contact. Fossum
> fielded
> over ten questions before the ISS went over the horizon. Students who
> participated
> in the contact are involved in Lompoc's STaRS (Space, Technology and
> Robotics
> Systems) Academy. The event highlighted students? studies covering
> space
> flight, the space environment, orbital motion, ground tracking, life
> support
> systems and rockets. The Santa Maria Times posted an article about the
> experience:
> http://santamariatimes.com/news/local/education/talking-to-an-
> astronaut-in-space/article_b85f7212-eb40-11e0-a23f-001cc4c002e0.html
>
> 3. NASA Shares Kiroli Contact Audio
>
> Kiroli Elementary School students from West Monroe, Louisiana took part
> in an ARISS contact with Satoshi Furukawa, KE5DAW on the International
> Space Station on September 22. This was the first ARISS contact for
> Louisianans. On Wednesday, September 28, NASA tweeted a link to the
> contact audio and also provided a link to audio on its Web site. http://
> ia700705.us.archive.org/33/items/Expedition29/09-22-11_EXP29_HAM-
> Radio-Pass.mp3
>
> 4. Premier of Nunavut, Canada Promotes ARISS
>
> Eva Aariak, the Premier of the Territory of Nunavut, Canada, and
> Minister
> of Education, gave a talk about the importance of education, especially
> in the fields of Science, Technology, Engineering and Mathematics (STEM)
>
> and how the Amateur Radio on the International Space Station (ARISS)
> program makes learning interesting. See: http://www.youtube.com/
> watch?v=0jSroPPcXtM
>
> 5. Astronaut Training Status
>
> ESA Astronaut Samantha Cristoforetti has been assigned callsign IZ0UDF.
> Cristoforetti was selected as an ESA astronaut in May 2009.
>
> 6. ARRL QST on ARISS
>
> The American Radio Relay League (ARRL) October QST had several items
> related to ARISS, as follows:
>
> The "In Brief" column made mention of the deployment of ARISSat-1 from
> the ISS on August 3.
>
> Then the "Happenings" column carried a 3/4-page article covering the
> deployment in depth -- the article was titled, "Cosmonauts Deploy
> ARISSat-1 from ISS".
>
> The "Media Hits" column featured the many hits that the ARISSat team g
> ot, including national-level PR such as the UPI, International Business
> Times, EETimes, NASA.gov, and Space.
>
> The same column also made mention of an article in the Press &
> Sun-Bulletin
> of Vestal, NY that highlighted Kopernik Observatory's summer science
> Pegasus
> program for kids. (Kopernik sponsored the Windsor Central District
> schools'
> ARISS contact.) The article talked about Kopernik hams who helped kids
> make contact with ham satellites using the observatory's ham station.
>
> 7. ARRL Articles on ARISSat
>
> The American Radio Relay League (ARRL) posted two articles on ARISSat in
> its
> September 29 issue of the ARRL Letter. The first piece covers the survey
> about
> ARISSat operations. The second item is about the Chicken Little Contest
> which
> is being held to guess when ARISSat-1 will re-enter Earth?s atmosphere.
> Those
> who wish to participate may enter one of three categories: students in
> grades
> K-8, students in grades 9-12 and adults. Submissions will be accepted
> until
> October 15, 2011 at 23:59:00 (UTC).
> See: http://www.arrl.org/arrlletter?issue=2011-09-29
>
> 8. AMSAT Italia Presents Plaques to Expedition 26/27 Crew Members
>
> During the post-flight tour of the MagISStra mission, AMSAT Italia
> presented
> plaques to ESA astronaut Paolo Nespoli and NASA astronaut Cady Coleman.
> The inscriptions read:
>
> "in appreciation for the dedication so generously given by Catherine G.
> Coleman, KC5ZTH to scientific education and science dissemination"
> ESRIN - Frascati, 22 September 2011?
>
> "in apprezzamento dell'impegno profuso dal Socio d'Onore Paolo Nespoli,
> IZ?JPA a sostegno dell'educazione e della divulgazione scientifica"
> ESRIN -
> Frascati, 22 Settembre 2011?
>
> For photos, see:
> http://www.flickr.com/photos/63976489@xxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> 9. EE Times - ARISSat Blog
>
> New entries have been made to the EE (Electronic Engineering) Times
> ?Chips in Space? blog about amateur radio satellite ARISSat-1. The
> second
> part of ?Lessons Learned? may be found at this link:
> http://www.eetimes.com/
> electronics-blogs/chips-in-space/4228027/Chips-in-Space--Lessons-
> learned--Part-2-
>
> Current results from the survey held about ARISSat-1 operations may be
> viewed here (the survey remains open):
> http://www.eetimes.com/electronics-blogs/other/4228654/Chips-in-Space--
> Survey-Says-
>
> 10. Amateur Radio Newsline on ARISS
>
> The Amateur Radio Newsline Report 1781, posted on September 30, included
>
> a story on Jamboree on the Air (JOTA) 2011 which will be held over the
> October 15 ? 16 weekend. The item mentions that ISS Astronaut Mike
> Fossum,
> KF5AQG is a scoutmaster and may be on the air over the weekend, if time
> allows. ?Ham Radio and Scouting: JOTA 2011 - October 15 ? 16,? may be
> viewed at:
> ftp://ftp.arnewsline.org/quincy/News/news.txt
>
> [ANS thanks Carol, KB3LKI, for the above information]
>
> /EX
>
>
> In addition to regular membership, AMSAT offers membership in the
> President's
> Club. Members of the President's Club, as sustaining donors to AMSAT
> Project
> Funds, will be eligible to receive additional benefits. Application
> forms are
> available from the AMSAT Office.
> Sign up for the Symposium and get your reservations in ASAP to take
> advantage
> Of the early discounts offered.
>
> 73,
> This week's ANS Editor,
> Dee Interdonato, NB2F
> Nb2f at amsat dot org
>
>
>
>
>
>
> ------------------------------
>
> Message: 8
> Date: Sun, 09 Oct 2011 11:39:04 -0400
> From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> To: pe0sat@xxxxx.xxx amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: ARISSat-1 over Europe
> Message-ID: <iff51h0054ltuWb05ff5HB@xxxxx.xxx>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello Jan,
>
> Yes, the battery is dead. There are no transmissions when the satellite
is in eclipse. Also, after ARISSat-1 re-enters sunlight, there is a 15
minute delay from a built in timer before transmissions begin.
>
> Here in the US, we don't currently have any useable windows! It's either
in eclipse, or too close to it for the transmitter to come on overhead.
>
> The orbit will precess in the next couple of weeks and we'll again have
some useable time.
>
> 73,
>
> Mark N8MH
>
> At 04:22 PM 10/9/2011 +0200, PE0SAT wrote:
>
>
>
>> Are there stations in Europe that receive ARISSat-1 telemetry or other
>> data? I tryed last week and yesterday evening but nothing was received.
>>
>> Are the batteries completly drained and therefor no activity when the
>> Sat is in the dark :-)
>>
>>
>> 73 Jan PE0SAT
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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
>
>
>
> ------------------------------
>
> Message: 9
> Date: Sun, 9 Oct 2011 09:22:43 -0400
> From: Zac Manchester <fleet@xxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] KickSat - a personal spacecraft of your own in
> space
> Message-ID:
> <CAKkXDTVprkw8mr1fdfVQORAVzjvymMdpdEthpTNECKPYDVf5Ag@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hello,
>
> I'm launching a project in my spare time that some AMSAT members might
> be interested in. I'm a graduate student in Aerospace Engineering at
> Cornell, and I've been working on a ChipSat/Femtosatellite called
> Sprite for the last several years. I want to launch a CubeSat full of
> Sprites into low Earth orbit to demonstrate their viability in space.
> I'm raising money to build the hardware via the Kickstarter website
> (kicksat.org). Donors who sponsor a sprite will get to name it and
> specify the text that it will transmit. A group or club can also
> sponsor a fleet of Sprites together.
>
> I'm doing this to try to get more people involved in spaceflight. I
> want to make it easy enough and cheap enough so that anyone can take
> part.
>
> Please check out my page on Kickstarter for more information - kicksat.org
>
> Thanks,
> Zac Manchester
>
>
> ------------------------------
>
> Message: 10
> Date: Sun, 09 Oct 2011 17:50:48 +0100
> From: Clive Wallis <list1@xxxxx.xx.xx>
> To: amsat <amsat-bb@xxxxx.xxx>
> Subject: [amsat-bb] Re: G5500 Elevation Rotator Short Circuit?
> Message-ID: <4E91D0E8.2030702@xxxxx.xx.xx>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Many thanks Tim for your comments. From what you've said it sounds like
> a faulty motor. In the ones you've repaired have you been able to
> determine the cause of motor over heating?
>
> The problems I've had in the past have always been due to water getting
> into the units.
>
> 73 Clive G3CWV
>
> Hitchin, North Hertfordshire, UK
>
> On 07/10/2011 18:50, Tim Cunningham wrote:
>> The common failure of the motor windings is caused by heat which
>> causes the enamel coated wire to breakdown. When the enamel breaks
>> down an inner winding short results.
>>
>> I have successfully rewound motor windings on these rotators just to
>> say it could be done, but it takes some work (not recommended).
>>
>> I have never seen one of these motors with an open winding. The
>> failure mode on the 8 that I have repaired were always enamel
>> insulation breakdown as a result of overheating.
>>
>>
>> Tim - N8DEU
>>
>>
>> Sent from my HTC Tilt? 2, a Windows? Mobile phone
>>
>> -----Original Message----- From: Clive Wallis<amsat-bb@xxxxx.xx.xx>
>> Sent: Friday, October 07, 2011 11:35 AM To:
>> amsat<amsat-bb@xxxxx.xxx> Subject: [amsat-bb] G5500 Elevation Rotator
>> Short Circuit?
>>
>> I wonder if this is a known fault. Recently the fuse on my G5500
>> blew. The problem seems to be a short on one of the motor
>> circuits.
>>
>> Checking the DC resistance at the control end, the resistance of one
>> winding is 1.2 ohms, whereas all the other windings are 4.6 ohms.
>>
>> I could understand a motor burning out and going open circuit, but
>> a short circuit seems less likely. I'm wondering if it could be a
>> short on the cable at the rotator end, where it is subject to much
>> bending. There's about 15 metres of cable.
>>
>> Any thoughts would be much appreciated. Unfortunately, at the
>> present time I'm not able to inspect the rotator. It's stuck in the
>> horizontal position, so I will still be able to use the antenna for
>> low elevation passes.
>>
>> 73 Clive G3CWV
>>
>> Hitchin, North Hertfordshire, UK
>> _______________________________________________ Sent via
>> AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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
>>
>
>
>
> ------------------------------
>
> Message: 11
> Date: Sun, 09 Oct 2011 10:38:41 -0700
> From: Bill Ress <bill@xxxxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in
> space
> Message-ID: <4E91DC21.70205@xxxxxxxxxxx.xxx>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Interesting idea Zac, but I have a few questions.
>
> Will each Sprite have it's own frequency?
>
> Since these Sprites are operating in the Amateur satellite bands, how
> will you license them?
>
> How will you handle the frequency coordination of these transmitters?
>
> Regards...Bill - N6GHz
>
>
>
> On 10/9/2011 6:22 AM, Zac Manchester wrote:
>> Hello,
>>
>> I'm launching a project in my spare time that some AMSAT members might
>> be interested in. I'm a graduate student in Aerospace Engineering at
>> Cornell, and I've been working on a ChipSat/Femtosatellite called
>> Sprite for the last several years. I want to launch a CubeSat full of
>> Sprites into low Earth orbit to demonstrate their viability in space.
>> I'm raising money to build the hardware via the Kickstarter website
>> (kicksat.org). Donors who sponsor a sprite will get to name it and
>> specify the text that it will transmit. A group or club can also
>> sponsor a fleet of Sprites together.
>>
>> I'm doing this to try to get more people involved in spaceflight. I
>> want to make it easy enough and cheap enough so that anyone can take
>> part.
>>
>> Please check out my page on Kickstarter for more information - kicksat.org
>>
>> Thanks,
>> Zac Manchester
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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 6, Issue 558
> ****************************************
------------------------------
Message: 7
Date: Mon, 10 Oct 2011 10:43:20 -0700 (PDT)
From: George Henry <ka3hsw@xxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in
space
Message-ID: <1318268600.72260.YahooMailRC@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Someone correct me if I'm wrong, but isn't 900 MHz only allocated for
terrestrial use, worldwide? I know that there's no amateur satellite service
allocation at 902 MHz...
George, KA3HSW
----- Original Message ----
> From: JoAnne Maenpaa <k9jkm@xxxxxxx.xxx>
> To: Bill Ress <bill@xxxxxxxxxxx.xxx>; amsat-bb@xxxxx.xxx
> Sent: Mon, October 10, 2011 9:29:21 AM
> Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in space
>
> > Will each Sprite have it's own frequency?
> >
> > Since these Sprites are operating in the Amateur satellite
> > bands, how will you license them? How will you handle the
> > frequency coordination of these transmitters?
>
> The information that Zac and his team provided to AMSAT News Service in
May,
> 2011 reported that the Sprite prototypes that were deployed on the ISS
> operated with 10 milliwatts of RF power at 902 MHz using MSK modulation
> (minimum-shift keying) with a chipping rate of 50 kbps.
>
> Copy of original release below ...
>
> --
> 73 de JoAnne K9JKM
> k9jkm@xxxxx.xxx
> Editor, AMSAT News Service
>
[snip]
------------------------------
Message: 8
Date: Mon, 10 Oct 2011 14:36:51 -0400 (GMT-04:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Dinesh Cyanam <dinesh@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: SRMSAT Keps and Down Link Details
Message-ID:
<5265569.1318271811579.JavaMail.root@xxxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Dinesh,
Is this a cubesat, or a microsat? The webpage indicates it is
286mmx286mmx294mm and 10kg, which is more the size of AO-51 than a 100mm^3
cubesat.
Is there any possibility of a secondary amateur communications mission?
Good Luck with the launch.
73, Drew KO4MA
-----Original Message-----
>From: Dinesh Cyanam <dinesh@xxxxxx.xxx>
>Sent: Oct 10, 2011 1:43 PM
>To: amsat-bb@xxxxx.xxx
>Subject: [amsat-bb] SRMSAT Keps and Down Link Details
>
>SRMSAT, A cubesat developed by the students of SRM University, India will
be launched on October 12th, 2011 along with the Megha Tropique satellite on
the PSLV-C18 launch vehicle from ISRO's spaceport in Sriharikota, India.
>
>Payload Details:
>SRMSAT will monitor the green house gases in near infrared region (900nm -
1700nm).
>
>Launch Date and Time:
>October 12, 2011
>0530 hrs UTC
>
>Telemetry down link and CW beacon on the same frequency: 437.425 MHz (10 dbm)
>(Telemetry decoding info will be posted soon)
>
>Preliminary TLEs from ISTRAC (ISRO Telemetry, Tracking and Command Network):
>SRM
>1 99999U 11072A 11278.34967500 .00001077 00000-0 60876-3 0 1233
>2 99999 20.0603 97.4017 0010015 338.6461 208.4324 14.09199968 14
>
>Website: http://srmsat.in
>
>All Radio Amateurs are requested to track SRMSAT and provide us with the
reception reports via AMSAT-BB mailing list or via email to KC2YQJ <at>
arrl.net
>
>73
>KC2YQJ
>Dinesh Cyanam
>
>
------------------------------
Message: 9
Date: Mon, 10 Oct 2011 13:49:46 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: "'AMSAT'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: KickSat - a personal spacecraft of your own in
space
Message-ID: <001501cc877d$624e6b70$26eb4250$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hi George,
> Someone correct me if I'm wrong, but isn't 900 MHz only allocated
> for terrestrial use, worldwide? I know that there's no amateur
> satellite service allocation at 902 MHz...
The original Cornell Chipsat mission news release that mentioned they were
using 902 MHz was not an amateur radio mission. Not sure what other radio
service they qualified for. Cornell hoped that some "suitably equipped"
amateur earth stations would receive their signals, hence their request.
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. 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 6, Issue 559
****************************************
Read previous mail | Read next mail
| |
