Difference between revisions of "Project:HackSat One"

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(The Orbit)
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== The Orbit ==
 
== The Orbit ==
''"While we don't know the orbit, we're aiming for a circular low altitude LEO - around 300 km. altitude. That would mean a roughly 90 minute orbit with several daylight passes per day (usually 3 or 4 over any given location). Each pass would be somewhere around 5 minutes long."''
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''"While we don't know the orbit, we're aiming for a circular low altitude LEO - around 300 km. altitude. That would mean a roughly 90 minute orbit with several daylight passes per day (usually 3 or 4 over any given location). Each pass would be somewhere around 5 minutes long."''  
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At that (low) a hight - the orbit repeat cycle would really matter quite a bit; i.e. how many days before it passes within line of sight of a given ground station; and is there enough power to survive across such cycles; or if not - is there enough to be 'on' when doing an overpass (in daylight).
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B.t.w. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4526281 has a pretty good overview.

Revision as of 22:30, 7 November 2011

HackSat1 is a KickSat sprite and is due to launch some time in early 2013.

The dev kit is due May 2012. Speak to Flux if you're interested in getting involved.

Current Activities

Sprite Hardware

We don't get to design the hardware on this mission, just program it.

  • controller: CC430F6137 (16-Bit Ultra-Low-Power MCU, 32KB Flash, 4KB RAM, CC1101 Radio, AES-128, 12Bit ADC, USCI, LCD driver)
  • sensors: temperature + one other TBC (KickSat are taking suggestions)
  • radio: we can transmit what and when we like (subject to solar power) but data rate is only a few bits per second

"For sensors, basically they have to be packaged in a tiny SMT chip and not use too much power (no more than a few mW). We don't have a list yet, but one example of something that would work is this magnetometer: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Magneto/HMC5883L-FDS.pdf"

The Orbit

"While we don't know the orbit, we're aiming for a circular low altitude LEO - around 300 km. altitude. That would mean a roughly 90 minute orbit with several daylight passes per day (usually 3 or 4 over any given location). Each pass would be somewhere around 5 minutes long."

At that (low) a hight - the orbit repeat cycle would really matter quite a bit; i.e. how many days before it passes within line of sight of a given ground station; and is there enough power to survive across such cycles; or if not - is there enough to be 'on' when doing an overpass (in daylight).

B.t.w. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4526281 has a pretty good overview.