IF dreaming season is now open.. :-)

has any amateur satellite mission been conceived (and implemented) where the satellite is permitted/designed for in-orbit maneuvering with other spacecraft ? Simple example: Sat A, flies in formation with Sat B. Complex example: Sat A, changes orbit to rendezvous with Sat B. Could be useful to avoid debris and other spacecraft, or could be very useful in "joining" missions with additional tasks as Mission A Sat A performs operations on/with Mission B Sat B.

concept: "operations" is flexible term: example: fix other spacecraft.

Since these "cubesats" or "microsats" are often launched in clusters, I would have thought this should be a common topic by now? Any URLs that describe the maneuvering tasks in-orbit for any class of amateur spacecraft, please highlight them for education.

Thanks,

Samudra, N3RDX

On Tue, Sep 15, 2009 at 3:07 PM, Jerry [email protected] wrote:

Hi :  I guess you could say I miss AO-10   . RS birds   AO-40

FO-20  .

I could go on and on.

When I see all the cube sats launched and FM birds  I say to

Myself why didn,t they pull all the resources together to launch

One HEO.

I guess I will have to keep dreaming that this might happen.

The Dreamer

Jerry w0sat

---

Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

On Tue, September 15, 2009 21:07, Jerry wrote:

Hi,

Hi Jerry,

I guess you could say I miss AO-10, RS birds, AO-40, FO-20

I could go on and on.

When I see all the cube sats launched and FM birds I say to Myself why didn,t they pull all the resources together to launch One HEO.

I guess I will have to keep dreaming that this might happen.

The Dreamer

I experience the same dream :))

Jerry w0sat

73's Jan - PE0SAT

At 02:07 PM 9/15/2009 -0500, "Jerry" [email protected] wrote:

   Hi :  I guess you could say I miss AO-10   . RS birds   AO-40

           FO-20  .

             I could go on and on.

          When I see all the cube sats launched and FM birds  I say to

          Myself why didn,t they pull all the resources together to

launch

          One HEO.

           I guess I will have to keep dreaming that this might happen.

                 The Dreamer

                   Jerry w0sat

Don't feel bad, I have the same dream. :-)

My last Satellite contact was on AO-40 with WB6LLO. I just listen now... and wait.

KB7ADL

Jerry --

I share your nostalgia, and I've never even been able to work a HEO satellite!

But if you are asking this question in earnest, it has to be said that even if we amateurs could compell the universities launching cubesats to do as you ask, the resources would not equal one HEO launch. Say a cubesat costs $80,000 to launch. If current HEO cost estimates are correct, and we're looking at over $10,000,000 for that launch cost, then we would need to harness the wealth of 125 cubesat teams just for the launch cost. I don't think any university is going to wait for that.

There is an oft-repeated misapprehension lurking under here, too, and that is that the wealth going into the cubesat launches is money that would otherwise be spent on a HEO amateur satellite. Cubesats are (in large part) university projects aiming to give students access to the process of designing, launching and controlling a satellite. They are attractive to granting agencies (and even launch agencies) because of their eduational potential. To my knowledge, during the design and launch of previous amateur HEOs, professors did not line up to apply for grant money to hand over to AMSAT-NA or -DL, as they are now lining up to apply for money to build cubesats. Contrarywise, I don't believe many of these cubesats have made any demands at all from the (hobby) amateur community to defray their costs. (Perhaps this is not the case in countries where the cubesat represents one of the country's first forays into space, such as Turkey.)

In short, there is no evidence that cubesat activity is in any way reducing our opportunities to go to HEO again. Other, currently overwhelming, factors are doing that all by themselves.

What the cubesat platform has done, though, is offered a regular, affordable launch opportunity for low LEO. We members of this list could probably muster enough money to launch our own satellite, designed here, and controlled by us, if we so wished! (I think at one point JoAnne tried to start a thread along those lines.) You mention RS birds: could we deploy a 10m antenna from a 10 cm^3 volume? Maybe a spooled-out wire? What kind of propulsion can we make to get from cubesat LEO to something with a better footprint? In my opinion, if we really are the descendents of the garage-engineers of OSCAR-1, we should be buying up pumpkin cubesat spaceframes and posting videos for each other of the cool things we've achieved in that limited, but not impossible, space.

Here's some other ideas:

1. CW robot (a la RS) in a PIC. Can you do it in a single atmel atmega328? At 20 MHz? At 4? 2. PIC code so that the bird turns itself off over unpopulated areas. (I love my solo passes over the Atlantic when I have VO-52 all to myself, but I'd be willing to give them up for the greater good :-) Extra credit: have one chip do both of the above under a operating system 3. Antenna testing: hang a cubesat model up 50' in a tree with some funky antennas on it. Can you make them have the pattern you (we) want? 4. Propulsion. How much thrust can we safely get into a cube? 4. This one is completly impossible, but boy it would be nice to have a U/V transponder on a 10 cm^2 board. We'll have to wait years for someone to do that, though :-)

We really, honestly, still can have fun. Maybe not the fun that some of you had back in the day, but there's lots of cool stuff to be undertaken.

Finally, in that spirit, can I encourage everyone to join in on the cubesat launches in a few days? Watch the launch, get on internet chat and eavesdrop on the excited conversation of these young people. Join the global hunt for the proper keplerian elements for these birds, and copy what telemetry you can. We almost all of us have the skills and equipment to be part of a remarkable event. I can't tell you the thrill of letting these people know their baby is alive and beeping in space.

73, Bruce VE9QRP

On Tue, Sep 15, 2009 at 4:07 PM, Jerry [email protected] wrote:

Hi :  I guess you could say I miss AO-10   . RS birds   AO-40

FO-20  .

I could go on and on.

When I see all the cube sats launched and FM birds  I say to

Myself why didn,t they pull all the resources together to launch

One HEO.

I guess I will have to keep dreaming that this might happen.

The Dreamer

Jerry w0sat

---

Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb