Difference between revisions of "Project:HackSat One"

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'''HackSat1''' is a [http://kicksat.org KickSat] sprite and is due to launch some time in early 2013.
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{{Project||created=10/10/2011|status=Mission Failed|members=[[User:Flux|Flux]], [[User:Datagramm|Samuel]]}}
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[[File:Hacksat-devboard-hand.jpeg|thumb|right|Dev board for HackSat One]]
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[[File:Radio-testing-at-london-hackspace.jpeg|thumb|right|Radio testing with Samuel]]
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HackSat One is a tiny [https://flux.org.uk/projects/hacksat/hardware.html satellite sprite], launching as part of the [http://www.kickstarter.com/projects/zacinaction/kicksat-your-personal-spacecraft-in-space KickSat swarm]. The sprite is powered by its own solar panel and is capable of broadcasting signals back to Earth. It launched on 18th April 2014 as part of a NASA mission to resupply the International Space Station. Due to issues with deployment (see mission update, below) the mission failed. There is a related project to build [[Project:Hackney Space Centre|Hackney Space Centre]]. For the latest information see the [[Mailing List|mailing list]].
  
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The dev kit is due May 2012. Speak to [[User:Flux|Flux]] if you're interested in getting involved.
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__TOC__
  
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== Current Activities ==
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=== Mission Update: 14 May 2014 ===
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* Messing around with a [http://www.ti.com/LaunchPad TI LaunchPad] and learning the basics of [http://www.ti.com/msp430 MSP430]. See also [[MSP430 Mac Howto]].
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I'm sad to report that HackSat will not be stretching its solar panels
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* Working out the [[Project:HackSat1 Payload|payload]]
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after all. HackSat likely re-entered overnight whilst still inside
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* Working out what's needed for [[Project:Hoxton Space Centre|Hoxton Space Centre]] (ground station)
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KickSat.
  
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== Sprite Hardware ==
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HackSat launched on 18th April inside the KickSat satellite. KickSat
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We don't get to design the hardware on this mission, just program it.
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started out in an orbit of 299 by 331 Kilometers at an inclination of
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51.65 degrees. This is a low orbit and subject to a significant amount
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of drag.
  
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* controller: [http://www.ti.com/product/cc430f6137 CC430F6137] (16-Bit Ultra-Low-Power MCU, 32KB Flash, 4KB RAM, CC1101 Radio, AES-128, 12Bit ADC, USCI, LCD driver)
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Sixteen days after launch, KickSat was due to deploy HackSat and its
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* sensors: temperature + one other TBC (KickSat are taking suggestions)
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other satellite sprites. The delay was required by Nasa to avoid
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* radio: we can transmit what and when we like (subject to solar power) but data rate is only a few bits per second
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interfering with ISS operations. This meant HackSat would have began
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orbiting on 4th May.
  
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''"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"''
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On 30th April the watchdog microcontroller that runs the KickSat timer
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reset, probably due to a cosmic ray. This pushed the deployment of
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HackSat out to 16th May. Attempts to manually deploy HackSat via the
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uplink failed: the KickSat batteries never reached a high enough
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voltage to enable the uplink receiver.
  
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== The Orbit ==
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Since launch signals from KickSat have been regularly received by
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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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ground stations around the world. Recent orbital predictions suggested
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that re-entry was likely 13-14th May. No stations have reported
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hearing KickSat overnight, so it seems very likely it has already
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re-entered.
  
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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). The basic concept that as it circles earth in a bit over 90 minutes; each pass is a couple of degrees westward (on the illuminated side of earth usually) - returning to roughly the same orbit after a couple of days/weeks. Key is then having (had) enough power to charge any batteries to be able to power up the transmitter (and generally not having enough time/power to establish position - so you need to do this a lot - in a hit and run mode looking for the elusive ground station and then offload your wares quickly -- within the 10's of seconds you have (left).
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- [[User:Flux|Flux]] ([[User talk:Flux|talk]]) 09:40, 14 May 2014 (UTC)
  
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B.t.w. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4526281 has a pretty good overview.
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=== Schedule ===
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After several launch delays, KickSat is now in low Earth orbit.
  
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HackSat and the other sprites will be deploying ~ 20:00 UTC on 4th May.
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Our satellite is contained with the bigger KickSat. 128 sprites are loaded into it. It has the names of contributors engraved on it, including "London Hackspace". You can see a [http://zacinaction.github.io/kicksat/engraving_photos/KickSat_minusY_Zoom2.jpg photo of the actual KickSat], complete with our engraving (we're on the bottom row, 4th from the right).
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=== Software Payload ===
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HackSat broadcasts a simple set of data on temperature, magnetic field and angular velocity. It will also broadcast the HackSpace URL: http://hack.rs
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If you're interested in trying to receive the signal from HackSat (and
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the other KickSat sprites) yourself see [https://github.com/zacinaction/kicksat/wiki/Setting-Up-A-Ground-Station setting up a ground station].
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=== Hardware ===
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Below, you can see a photograph of the dev board and dev kit. The sprite board itself is outlined in yellow, with the solar panel taking up most of the left-hand side. The boards beneath beneath the sprite are the TI LaunchPad and connecting board. Key components on the spite are:
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* '''TI CC430F6137 microcontroller''' (red): 16-Bit [http://en.wikipedia.org/wiki/TI_MSP430 MSP430], 32KB Flash, 4KB RAM, CC1101 Radio [[http://www.ti.com/product/cc430f6137 datasheet]]
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* '''InvenSense ITG-3200 Gyroscope''' (orange) [[https://www.sparkfun.com/datasheets/Sensors/Gyro/PS-ITG-3200-00-01.4.pdf datasheet]]
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* '''Honeywell HMC5883L Magnetometer''' (blue) [[http://www51.honeywell.com/aero/common/documents/myaerospacecatalog-documents/Defense_Brochures-documents/HMC5883L_3-Axis_Digital_Compass_IC.pdf datasheet]]
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* '''TXC 7Z-26.000MDG-T Oscillator''' (purple)  [[http://www.txccrystal.com/images/pdf/7z.pdf datasheet]]
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* '''Nitinol antennas''' (extend off top right of photograph) [[http://en.wikipedia.org/wiki/Nitinol nitinol info]]
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For more detail on the sprite hardware, including EagleCAD layouts, see the [https://github.com/zacinaction/kicksat/tree/master/Sprite/EagleCAD/Sprite KickSat Git repo].
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''NB. The dev board (pictured) has a different oscillator to that mentioned above.''
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[[File:Annotated-kicksat-dev-board.jpg]]
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=== Decal ===
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[[File:Hacksatone-mission-decal.png]]
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''Decal created by Nick Cramp.''
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[[Category:Projects]]
 
[[Category:Satellites]]
 
[[Category:Satellites]]

Latest revision as of 09:41, 14 May 2014

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