These open phone boards [1] are pretty much all the hardware you need
for an avionics solution:
- 512MB RAM, 512MB NAND flash
- microSD expansion up to 32GB
- TI DM3730, Cortex-A8 processor like BeagleBoard, 800MHz C64x+ DSP
- quad-band GSM, EDGE, UMTS HSDPA (14.4Mbps), HSUPA 5.76Mbps
- 802.11b/g wifi, Bluetooth 2.0, FM receiver/transmitter, RFID
- 20 channel GPS w/connection for external antenna
- barometer / thermometer
- 1.3 megapixel camera
- USB / RS232 / audio jack / 2x60 pin expansion connector
- 3-axis accelerometer, 3-axis compass, 3-axis gyroscope
The PhoneSat [2] guys are shooting for a $10k price point (that is for
the full CubeSat I think), just this board is under $1k.
[1] http://www.linuxfordevices.com/c/a/News/Golden-Delicious-Openmoko-GTA04/
[2] http://www.daytondiode.org/2011/12/google-spaceship.html
[3] http://www.daytondiode.org/2011/11/attending-hackerspace-workshop.html?showComment=1328966901552#c8518826887510944832
--
Joshua Stults
Website: variousconsequences.com
Hackerspace: daytondiode.org
[1] http://www.vectornav.com/index.php
[2] http://www.vectornav.com/index.php?option=com_content&view=article&id=45&Itemid=10
[3] http://www.vectornav.com/index.php?option=com_content&view=article&id=3&Itemid=4
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> In addition be VERY careful about the GPS unit you
> choose to use as any unit sold for export outside the US, will be limited on
> the max altitude it can report. The units that can report higher altitudes
> are under strict export requirements.
Well, it depends on how the vendor implemented the ITAR restrictions.
Some do max altitude AND max speed, some do max altitude OR speed, and
the documentation is never very clear on the exact details. Annotated
ITAR is a good reference [1]; if you can sort the details you're a
better man than I.
> element of the puzzle, you also need a functional ground station with an
> auto-tracking antenna based off the 2-line elements generated after a pass
> from the cubesats telemetry data.
The NASA guys we talked to about PhoneSat said they are looking at
using the FunCube dongle [2] for quick and dirty ground stations; I'm
not sure how far along their efforts are.
> views, what type of propulsion would be used to keep the bird from spinning.
It doesn't have to be propulsion; could be reaction wheels [3].
> Just some thoughts... >_<
Good thoughts IMO : - )
[1] http://www.ndia.org/Resources/ExportImportComplianceResources/Pages/AnnotatedITAR.aspx
[2] http://www.funcubedongle.com/
[3] http://en.wikipedia.org/wiki/Reaction_wheel
The hardest part of Carmack's micro-prize [3] wasn't the rocket
design/fab, it was getting a GPS solution at high-altitude (but
low-speed) after a high-acceleration boost [4], because of those
restrictions you mention...
[1] http://www.holmea.demon.co.uk/GPS/Main.htm
[2] http://psas.pdx.edu/AntennaDesignLV2/
[3] http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=376
[4] http://ddeville.com/derek/Qu8k.html
In a world of $11 software defined radios [5], the ITAR restrictions
on GPS are in increasing danger of becoming meaningless; hopefully
this reality will be addressed with the ongoing Presidentially-ordered
consolidation and streamlining of our export control regime in this
country.
> [1] http://www.holmea.demon.co.uk/GPS/Main.htm
> [2] http://psas.pdx.edu/AntennaDesignLV2/
> [3] http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=376
> [4] http://ddeville.com/derek/Qu8k.html
[5] http://sdr.osmocom.org/trac/wiki/rtl-sdr
[6] http://gnuradio.org/redmine/projects/gnuradio/wiki/GlobalPositioningSystem