[amsat-bb] S band: Too early, as I said
rwmcgwier at comcast.net
Sun Sep 10 07:31:47 PDT 2006
As I said previous to this note, our analysis and all of this hoopla is
released too early. We have not fully prepared for the onslaught and
we have only done a <<technical analysis>> that resulted from the
assumption that Galileo was going to cause loss of L band. It is not in
our political interests frankly for this understanding to be widespread
but now that it is, we might as well go ahead and do all of our "worst
case scenario" analysis in public.
It is my understanding that Argentina and the Netherlands have LOST
2400-2450 for use by terrestrial radio amateurs because of interference
from amateur radio operators (primarily BLOODY ATV) to 802.11 services.
Amateurs have been told to stop transmitting in those bands. I need
much more information.
DO NOT SEND YOUR ANECDOTE HERE.
Please send to me DIRECTLY your personal, first hand knowledge of loss
of 2400-2450 IN YOUR COUNTRY or any other country FOR WHICH YOU CAN
PROVIDE DOCUMENTARY EVIDENCE. I have no interest whatsoever in rumor.
I need facts. If this phenomenon is widespread, then the use of S
band as an uplink is a useless argument to be having and the whining
can stop. ALL that was done in San Diego was a technical analysis. No
legal or political analysis has been done at all. We are not prepared
to say "This is what we are doing". We are prepared to say "This is
what the technical folks came up with given the assumption of the loss
of L band and the assumption that 9 cm would be politically
unacceptable". NOTHING ELSE should be assumed now.
But let me repeat (ad infinitum?), I am personally interested in
managing the design and building of an instrument that accomplishes the
AMSAT vision statement. If I find that we have essentially lost all
microwave bands we have in the amateur satellite service that can be
used effectively to support the vision statement (given engineering
computation and "circuit practicalities"), I will lose interest in
managing this whether it be an AMSAT political decision or an
international frequency disaster which we have allowed to go unanswered
in any substantive way. AMSAT-DL is the perfect vehicle to produce P3
spacecraft with our help where needed. We do not need to duplicate
DO NOT send your anecdote to this list. Send your FACTS to me, with
supporting evidence, so I can summarize what I believe the impact of
this to be for the AMSAT BOD.
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
"You see, wire telegraph is a kind of a very, very long cat.
You pull his tail in New York and his head is meowing in Los
Angeles. Do you understand this? And radio operates exactly
the same way: you send signals here, they receive them there.
The only difference is that there is no cat." - Einstein
More information about the AMSAT-BB