As Bruce says, the plan for Eagle is 2 satellites much smaller than AO-40 with the mode (B or UV) that was used on AO-10, AO-13 and AO-40. Two problems with previous phase 3 satellites were that the transponder had to be turned off during parts of the year and some modes only worked near apogee. Consequently, a new mechanical design was proposed that allows operation at all sun angles encountered in Eagle's orbit and has gain antennas that work over approximately 75% of the orbit.
73,
John KD6OZH
----- Original Message ----- From: "i8cvs" domenico.i8cvs@tin.it To: brobertson@mta.ca; "AMSAT-BB" amsat-bb@amsat.org Sent: Thursday, September 14, 2006 18:53 UTC Subject: [amsat-bb] Re: The Mode B tradition, was Re: The Eagle has died.
----- Original Message ----- From: "Bruce Robertson" broberts@mta.ca To: "AMSAT-BB" amsat-bb@amsat.org Sent: Thursday, September 14, 2006 5:22 PM Subject: [amsat-bb] The Mode B tradition, was Re: The Eagle has died.
Quoting i8cvs domenico.i8cvs@tin.it:
----- Original Message ----- From: "Robert Oler" cvn65vf94@msn.com To: kc6uqh@cox.net; domenico.i8cvs@tin.it; vk6xh@arach.net.au; amsat-bb@amsat.org Cc: iz1dsj@sparks.it Sent: Thursday, September 14, 2006 4:56 AM Subject: Re: [amsat-bb] Re: The Eagle has died.
If Eagle dies, so does technoloigy for AMSAT, and the Amateur Radio Community!
What is next? Quenched Arc? Spark? 200 KHz and down?
Art , KC6UQH
Hello Art.
clipped
I close with this thought. Instead of Oscar 40, had the community
gotten
two more Oscar 13's. Pretty plain jane birds with not a lot of gizmos
and
Amsat engineers would have had to have been content with reinventing
the
wheel...but say instead of AO-40 as a pile of junk we had two more
Oscar
13's that worked.
Dont you think it would have been a better deal then we got? Do you
think
that there would have been more or less people involved in HEO communications?
I think more...and I think that is a good thing.
Robert G. Oler WB5MZO/portable Life member AMSAT ARRL and a few other organizatiions.
I agree Robert
Much more content satellite users with reinventing the wheel !
Look at many are actually operating CW and SSB on OSCAR-7 , FO-29 and VO-52 waiting for the next viable HEO
73" de
i8CVS Domenico
Happily, two of the three birds you mention above, AO-7 and VO-52, are in exactly the mode that analog Eagle users will be using, U/V. As I understand it, the plan is to have this link working 24/7. (Yes it will primarily use a software-driven transponder, but that will be transparent to the analog user.) In this regard, I can't see how the design team can be accused of unnecessarily innovating.
73, Bruce VE9QRP
Hi Bruce, VE9QRP
You missed the point because Robert (and I aegree) says that from an operational point of view it would much better to have two less costly satellite like OSCAR-13 now in orbit but working instead of a more complicaded and costly AO40 not working.
When AO40 died I losted all my satellite friends in the USA and Pacific area and you losted all your friends in Europe and so on.
If two OSCAR-13 similar satellites where working now we all will be discussing this problems on the air for hours instead to push the keyboard on internet and the numbar of satellite users will be larger and having a larger number of satellite users means to have big voice and power during the IARU and ITU Conferences
On the other side from the techincal point of view if AO40 was not born then our knowledge and skill in microwave would be less.
A good balance from the operational and technical needs is necessary because radio-ham is not only technical or only operational but a mix of both but initially the easy space communication is more important then highly technological.
Let at first the amateur community to work worldwide with satellites similar to OSCAR-13 and hopefully P3E to prevent that they becames frustrated waiting a life in a single FM channel for a new good one after OSCAR-13 or AO40
73" de
i8CVS Domenico
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