David,
In some ways, the CubeSat programs resemble the old "X Projects" that the US did with aircraft. Instead of building from scratch the ultimate plane, they built a series of test beds that were designed to do one thing very well. Eventually, the lessons learned from each project were combined into a single airframe. For us, the trick is to ALWAYS provide useful communications along with whatever is being developed.
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of G0MRF@aol.com Sent: Friday, February 04, 2011 7:29 AM To: ve9qrp@gmail.com; amsat-bb@amsat.org Subject: [amsat-bb] Re: Fwd: Re: Rideshare missions to GTO,$800K for 3U Cubesat
Yes.
AO-24 was in a low inclination orbit. Probably a transfer orbit inclination of 2 -5 degrees. I recall the transponder output was up near 2450MHz.
It was very high and had excellent coverage. I believe it failed because it went into a planned shutdown due to something like eclipse or temp etc. Unfortunately it never switched back on.
While it was there it was very good. A bit low in the sky if you lived above or below 60N or 60S but nice and easy to track. Like AO-40 it was always in the southern sky from here.
When we talk about 10 million to launch it's worth remembering that the approach that has shrunk usable satellites to 1-3U cubesats can also be applied to MEO or GTO / HEO sats. Arianespace may no longer be flying test
flights, but Falcon 9 will go to GTO (and needs to be tested) as will the new Indian launcher. There are new satellites going en-mass to 20,000km too. A ride share with Galileo etc may be just as good.
Thanks
David
In a message dated 04/02/2011 13:08:19 GMT Standard Time, ve9qrp@gmail.com writes:
---------- Forwarded message ---------- From: Bruce Robertson ve9qrp@gmail.com Date: Fri, Feb 4, 2011 at 8:49 AM Subject: Re: [amsat-bb] Re: Rideshare missions to GTO, $800K for 3U Cubesat To: "John B. Stephensen" kd6ozh@comcast.net
On Thu, Feb 3, 2011 at 7:46 PM, John B. Stephensen kd6ozh@comcast.net wrote:
The interesting question is is how much will AMSAT members be willing to invest in ground stations. A 3U cubesat could provide a HEO satellite similar to Arsene (AO-24).
73,
John KD6OZH
That's a great point, John, and an interesting analogy, which I'd not heard about before. Does anyone have recollections and experiences with AO-24 that they could share?
73, Bruce
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