[ans] ANS-196 AMSAT News Service Weekly Bulletins

JoAnne Maenpaa k9jkm at comcast.net
Sat Jul 14 18:51:32 PDT 2007


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 at amsat.org

******************** AMSAT 2007 Space Symposium **************************

The Wireless Association of South Hills Amateur Radio Club announces the
2007 AMSAT Space Symposium will be held at the Pittsburgh Airport Marriott 
Hotel on Friday, October 26 through Sunday, October 28, 2007.

The AMSAT web team has posted informational pages on the AMSAT web site.
You can find the announcement with many links at:


In this edition:

* AO-51 Completes L/S Mode, Watch for New Modes
* Satellite Shorts From All Over
* NASA Makes Saturn Radio Transmission Recording Available
* High Efficiency RF Linear Amplifier Design Proposed for Eagle
* ARISS Status Report for the Week of July 9, 2007

SB SAT @ AMSAT $ANS-196.01
AO-51 Completes L/S Mode, Watch for New Modes

AMSAT News Service Bulletin 196.01
July 15, 2007
BID: $ANS-196.01

During the period of July 10 to July 12 AO-51 was in its FM repeater
mode with the uplink on 1268.700 MHz and the downlink on 2401.200 MHz.
Viktor, OE1VKW reported, "On July 10 AO-51 over Vienna with very strong 
signals!"  Alan, WA4SCA reported, "AO-51 came up in VS with a 145.920 
uplink at the start of the pass.  A couple of minutes before LOS, it 
switched over to LS, and I got a couple of quick test calls in.  It 
Sounded fine." 

Starting July 13, AO-51 is in the FM repeater mode, with an uplink on
145.920 MHz and downlink on 435.300 MHz.  9K6 telemetry is on the 
435.150 MHz downlink.

Next on July 24 look for AO-51 to operate with an SSB uplink via
145.880 MHz and FM downlink via 435.300 MHz.

[ANS thanks the AO-51 Operation Team for the above information]


SB SAT @ AMSAT $ANS-196.02
Satellite Shorts From All Over

AMSAT News Service Bulletin 196.02
July 15, 2007
BID: $ANS-196.02

+ Mineo Wakita, JE9PEL reported that JARL has been conducting
  tests on FO-29 when it is over Japan.  Telemetry analysis 
  can be found on-line at:

+ AMSAT-UK International Space Colloquium 2007 is coming soon.
  The 22nd International Space Colloquium at the University of 
  Surrey, Guildford, England from Friday 20th to Sunday 22nd July.
  The event is open to all. Either day passes or full packages 
  comprising overnight accommodation and meals at the University 
  are available. There is an online booking service for PayPal, 
  Visa and Master Card payments.  For further details see 

+ AMSAT received the sad news that Tom McDaniel, N0NTX passed away 
  on Monday July 2nd, 2007.  Services are tentatively planned 
  for Monday, July 9th.  Tom was active on the satellites.

+ The deadline for submitting technical papers for presentation at 
  the 26th Annual ARRL and TAPR Digital Communications Conference
  is July 31, 2007.  The conference will be held September 28-30, 
  2007 in Hartford, Connecticut. Please send papers to:
   Maty Weinberg
   225 Main St
   Newington, CT 06111
   or you can make your submission via e-mail to: maty at arrl.org

+ The deadline for receiving your submission (either email or 
  postal mail) for AMSAT Field Day is Monday, July 16, 2007 at 
  11:59 P.M. CDT.  E-mail to kk5do at arrl.net or postal mail to
  Bruce's callbook address.

+ Former AMSAT Board Member, Harry, JA1ANG, has been in the 
  hospital for several months.  If you wish to send him a card
  the address is:  Harry Yoneda, 15-1305 Shimouma, 2-Chome-26,
  Setagaya-ku Tokyo 154 Japan.

+ Ed Long, WA4SWJ, AMSAT Journal Editor reminds the membership
  that the time is already upon us to begin submitting articles 
  for the July/August issue.  You can submit your article via
  the journal at amsat.org e-mail address.

[ANS thanks everyone for the above information]


SB SAT @ AMSAT $ANS-196.03
NASA Makes Saturn Radio Transmission Recording Available

AMSAT News Service Bulletin 196.03
July 15, 2007
BID: $ANS-196.03

NASA has made available a recording from the Cassini spacecraft of
Saturn's intense radio emissions called Saturn kilometric radiation.

The Cassini spacecraft began detecting these radio emissions in April 
2002, when Cassini was 374 million kilometers (234 million miles) from 
the planet, using the Cassini radio and plasma wave science instrument, 
which provided the first high resolution observations of these emissions, 
showing an amazing array of variations in frequency and time. 

The complex radio spectrum with rising and falling tones, is very 
similar to Earth's auroral radio emissions. These structures indicate 
that there are numerous small radio sources moving along magnetic field 
lines threading the auroral region. 

For additional information and to hear the recording visit:

[ANS thanks 'The Daily Galaxy' and NASA for the above information]


SB SAT @ AMSAT $ANS-196.04
High Efficiency RF Linear Amplifier Design Proposed for Eagle

AMSAT News Service Bulletin 196.04
July 15, 2007
BID: $ANS-196.04

AMSAT members Allen Katz, K2UYH and Marc Franco, N2UO have
designed a VHF, high-efficiency, class-E, RF power amplifier
with a DC to RF efficiency of 86.8%.  Their innovative 
design is based on silicon carbide (SiC) metal-semiconductor 
field effect transistors, or MESFETs.

The design was presented in a paper at the IEEE International 
Microwave Symposium in Hawaii.  It is now available on-line:
http://www.cree.com/products/wireless_docs.htm titled
"Class-E Silicon Carbide VHF Power Amplifier" (June 5, 2007)

The final amplifier efficiency was measured at around 86 to 88%
with this number holding quite well at almost any drain voltage 
or output power. This type of amplifier is under consideration
for the envelope elimination and restoration linear amplifier
planned for the AMSAT Eagle satellite.

[ANS thanks Marc, N2UO for the above information]


SB SAT @ AMSAT $ANS-196.05
ARISS Status Report for the Week of July 9, 2007

AMSAT News Service Bulletin 196.05
July 15, 2007
BID: $ANS-196.05

1. School Contacts

Maples Collegiate in Winnipeg, Manitoba, Canada had an ARISS 
contact on Thursday, July 12. The school would like the ARISS 
contact to be part of the Win-Cube Project in Manitoba.  Win-Cube 
is an innovative science and engineering project that includes 
students from 10 high schools in Manitoba who will participate 
in the design, construction, launch, and communication with a 
pico-satellite in low earth orbit.  ARISS will provide students 
involved in the Win-Cube project with a real application of 
classroom learning with experiences like the ISS orbital elements 
and its relation to the availability of ground to orbit commu-
nication.  Students with their amateur radio licenses performed 
an active role in establishing and maintaining communication 
with the ISS.

Arnold Palmer Hospital for Children in Orlando, Florida has 
been slated for an ARISS contact on Tuesday, July 17 via the 
telebridge station W6SRJ in California. The hospital plans on 
involving children, who have been hospitalized long term, 
with this contact.  It will showcase the medical advancements 
made through space science, available due to NASA and its research. 
An ARISS team member will give a presentation to the children 
on Amateur Radio on the International Space Station and an astronaut 
will also be invited to speak to the children.  Lithographs will 
be distributed and children will design posters in anticipation 
of the contact.  

2. Challenger Learning Center Experiences Successful ARISS Contact

On Saturday, July 7, children visiting the Challenger Learning 
Center of Alaska in Kenai experienced an ARISS contact. Clay 
Anderson, KD5PLA, answered 12 questions posed to him by the 
participating students and a few more from the audience. A crowd 
of approximately 50 people was expected to attend.  


An ARISS Technical Interchange Meeting (TIM) was held the week of
July 9-13, in Houston. Topics of discussion included ARISS radio 
systems, SuitSat-2, and education issues.

4. Amateur Radio Newsline Article on ARISS Member

Amateur Radio Newsline posted a story about ARISS member Tony 
Hutchison, VK5ZAI, who was named to the Wireless Institute of 
Australia (WIA) board position of Australian National Coordinator 
for ARISS. Tony had recently given a talk on the ARISS education 
program to the board members.

[ANS thanks Carol, KB3LKI for the above information]


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.

This week's ANS Editor,
JoAnne Maenpaa, K9JKM
K9JKM at amsat dot org

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