AMSAT announces the 2010 AMSAT Space Symposium and Annual Meeting
will be held on Friday, October 8 through Sunday, October 10. This
year we have selected the Chicago/Elk Grove Holiday Inn which is
near O'Hare Airport for the event. This is the same hotel that
recently has hosted the Central States VHF Conference, Digital
Communications Conference and NIDXCC events.
All Amateur Radio Operators interested in space communications are
invited to participate in the Symposium offerings including:
+ Space Symposium with Amateur Satellite Presentations
+ Operating Techniques, News, & Plans from the Amateur Satellite World
+ Board of Directors Meeting open to AMSAT members
+ Meet Board Members and Officers
+ Annual General Membership Meeting
+ Annual Banquet-Keynote Speaker and Door Prizes
+ President's Club Reception
+ Area Coordinator's Breakfast
The Chicago/Elk Grove Holiday Inn is located at 1000 Busse Road,
Elk Grove, IL (near O'Hare Airport with free hourly shuttles).
The room rate and reservation information will be announced shortly.
for more news as it becomes available.
73 de JoAnne K9JKM
Editor, AMSAT News Service
Copy Editor, AMSAT Journal
Hi in Italy,
I just listened to a pass of AO-27 with AOS at
1406 UTC here in Copenhagen.
There were 2-3 Italian stations on in terestial
They were radio amateurs using calls - but too fast for
me to make out. IW9??? and IZØ???.
I am not sure but may be it is a repeater. There were a distinct
67 Hz tone on.
I could make out two city names: Catania and Modena.
If some satellite users know what it is please try to make
Have a nice Sunday.
I noticed that UO-22 might be passed over just 100000 of the orbit
number before long. UO-22 was launched on 17 July 1991.
It's now Non-Operational.
1 21575U 91050B 10148.66466669 -.00000020 00000-0 77105-5 0 8445
2 21575 98.4922 98.6195 0008358 67.4032 292.8038 14.39719412990416
The above kep is 'NORAD TLE Sets Current Data'.
The orbit number is 99041, so 959 to 100000.
100000 - 99041 = 959 ... orbit numbers until 100000
959/14.39719412 = 66.61020140 ... orbits/mean motion = days
148.66466669 + 66.61020140 = 215.27486809 ... epock time
The epock time 215.27486809 is 06:35:48 UTC, 3rd Aug 2010.
It maybe contains +/- one and a half hour's obserbational lag.
In addition, the counter number returns to 0 when the orbit number
JE9PEL, Mineo Wakita
Hi all ye Microwavers,
AMSAT-OH is working on the S/X band coherent/linear
transponder for P3E. The Coherent mode is a fully
functional testbed for the P5A ranging transponder.
Especially the linear transponder prototype has been
assembled and verified with over-the-air tests and
laboratory tests. Flight versions of the submodules
have been and are being produced at this time with
our eyes now set on integrating these together and
cabling the whole job together.
Full verification of the Coherent Mode requires a
fully functional command station AND a functional
IHU + CAN environment to interface our data ports with.
No such tests have been available yet, but all our
preliminary testing and evaluation of the Coherent
Processor have shown proper operation of the design
and circuitry (e.g. locking onto a "modulated" uplink
carrier, tracking this etc.). So far correct live
operation of the Coherent Mode is our biggest questionmark.
Our national team meets on a regular basis every 4 - 6 weeks
for testing and followups of the work of each individual.
This transponder is especially complex as you can
see from these key figures:
* 9 different local oscillators
* All local oscillators locked to the common 10 MHz USO
* 21 different frequency mixers
* 13 different intermediate frequencies
* Linear Mode output power on 10 GHz: 3 W PEP
* P5A Mode output power on 10 GHz: 1 mW PEP
* 38 control lines on the CAN interfaces
* 2 CAN interfaces, one in multiplexed mode
* 4 dedicated direct control lines interfacing with the IHU
* 14 analogue telemetry lines to the CAN bus
* Coherent Mode Uplink/Downlink ratio is fixed at 30:7
Here you may find a general outline webpage, though unfortunately in
Finnish for the benefit of our OH supporters, but you might still enjoy
the photos and drawings:
Our team sincerely hopes funding will eventually be found
for P3E/P5A - this is the only thing that keeps us motivated
to continue our work. On the other hand we are clearly behind
schedule, so the delays are welcome :-) But then again, any
news of progress would boost our production rate phenomenally ;-)
73 Michael, OH2AUE
"Life is too short for Sudoku"
Today I made an exciting experiment together with my friend Tetsu san
Since we can't hear NEGAI* in Central Europe we established a live link
between our stations.
Tetsu gave me access to his PC via remote control (VNC) and I could control
We established a second connection via skype for audio.
The audio quality was excellent and I could hear NEGAI at a 10 deg pass over
the Pacific Ocean :-)
See here: http://www.dk3wn.info/p/?p=15176
I came across the post below on a Usenet group. I am only a very occasional
ISS APRS user, but have noticed several of the regulars here when I do
operate. My impression is that it is either largely a non-problem, or
better solved through the APRS client. Can anyone suggest a good answer
which I can cross post?
I want to somehow disable the PTT on my TX from SatPC32 when the satellite
is below the horizon. This is very pertinent to running APRS through ISS.
At present I have to be stop my APRS program and restart it manually at the
correct times and I keep missing passes. I suspect I would need to use DDE
to link to some sort of port control program or maybe via rotor control but
am not experienced in using DDE.
Is there any SatPC32 guru who can make some suggestions?
Thanks from Dick G4BBH
If anyone is interested; I have micro duplexers for dual band antenna projects. I started building them for some of the the clubs in my area. 73
The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail.
Sold - that is $100 bucks to AMSAT for five minutes' work.
This is fun. Tell a friend.
On May 28, 2010, at 1:09 PM, jeffk13057(a)yahoo.com wrote:
Me! Me! Pick me!
73, Jeff WB2SYK