--- On Tue, 30/4/13, Nick Pugh <quadpugh(a)bellsouth.net> wrote:
> Both Pumpkin and ISSIS say they have flight heritage on
> 50 watt panels. EaLanta has rides to 600 KM
50 watts on a CubeSat ? That surprises me, I don't know of any that have flown so far that have generated more than about 6 watts of Solar Power. When you say "flight heritage" which CubeSat is being referred to ?
A free ELaNa CubeSat launch would mean partnering with an educational institution so part of the 3U and some of the solar power would have to be reserved for their payload.
> and we will have to deal with MR Van Allen when we get there.
Hopefully deal with it by design on the ground first ;-)
RS-15 (beacon 29.325 MHz) has been in the lower part (2,158 by 1,900 km orbit) of the radiation belt for over 18 years.
73 Trevor M5AKA
--- On Wed, 1/5/13, M5AKA <m5aka(a)yahoo.co.uk> wrote:
> Date: Wednesday, 1 May, 2013, 7:53
> --- On Tue, 30/4/13, g0mrf(a)aol.com <g0mrf(a)aol.com>
> > A compromise could be 4 Watts (ish) from MEO.
> > Here's an oldie but goodie..... http://www.g0mrf.com/MEOSAT.htm
> Yes MEO would be good. It should be possible to improve the
> signal levels while keeping omni-directional antennas on the
> satellite by using lower frequencies bands.
> A 144 to 50 MHz (if we can get an allocation there)
> transponder or 144 to 28 MHz would have a significantly
> reduced path loss on the downlink (8 dB ?) compared to
> 73 Trevor M5AKA
I am a senior studying Electrical Engineering at the Rochester
Institute of Technology (RIT) and I am a member of a senior design group
that was sponsored by AMSAT to produce an engineering prototype *Maximum
Power Point Tracker* (MPPT) for the Fox-2 satellite. Most members of our
team are licensed radio amateurs and active members of the RIT Amateur
Radio Club K2GXT and have had quite the experience with this project! We've
worked extremely hard over the past 20 weeks to design and build a working
MPPT. We'd enjoy sharing this experience with anyone interested.
* Everyone who is in the Rochester, NY area or are willing to drive to
the area is invited to come to the RIT campus this Saturday May 4th
for the Imagine
RIT Innovation & Creativity Festival <http://www.rit.edu/imagine/>. This is
a completely free event on the RIT campus*.The previous link will have all
the information to get here and find exhibits of interest. Also,
here's a pretty
concise video <https://www.youtube.com/watch?v=fsQoh-_xOmY> on what the
event is about. The AMSAT Maximum Power Point Project is exhibit
will be located in what is known as the "infinity quad" outside the
engineering building (There's a big Mobius strip in the middle). We're
pretty much in the center of outside activity which is very nice for
showing people our project.
- Google StreetView of the Infinity
- 2013 Imagine RIT Festival
will be between the orange GLE and red LBR, you'll see a star, mobius
strip, and question mark on the map where I am referring too, sorry if it's
Our project is part of the Kate Gleason College of Engineering senior
design program and we proposed this project as a group last Summer. Tony
Monteiro has been our "customer" for the project and has been great to work
with. You can find out more information on our P13271 RIT EDGE
wiki<http://edge.rit.edu/edge/P13271/public/Home>which is pretty
up-to-date pending a few updates (since PCB bring-up) but
largely a great resource for those interested for a more in-depth look into
our project. We have not completed our project but will be displaying the
working prototype MPPT during the festival and be more than happy to
explain/show it to anyone interested. There are some final tests and
reports that are left to finish before our project is complete.
Some links to high-interest items on our EDGE Server:
- 1 Page Project
- Project Poster<http://edge.rit.edu/edge/P13271/public/MSD_Poster/MSD_Poster_r1.pdf>
- MPPT Block
- MPPT Schematics<http://edge.rit.edu/edge/P13271/public/KiCad/MPPT/trunk/AMSAT_7W_MPPT_Schem…>(slightly
out of date, some final values will be updated soon, largely
- MSP430 firmware
Well, I think I've thoroughly linked to areas people might have
interest in. Feel free to poke around the project documentation and learn
more or ask questions. If you have any questions about Imagine RIT or
anything related to the festival please ask as well. I look forward to
potentially seeing some of you at the festival!
Project Manager P13271
This is the first call for papers for the 2013 AMSAT Annual Meeting and Space
Symposium to be held on the weekend of November 1 - 3, 2013, at the Marriott
Hobby Airport Hotel, Houston, Texas. Proposals for papers, symposium
presentations and poster presentations are invited on any topic of interest to
the amateur satellite community. We request a tentative title of your
presentation as soon as possible, with final copy to be submitted by October 1
for inclusion in the printed proceedings. Abstracts and papers should be sent
to Dan Schultz at n8fgv(a)amsat.org