Difference between revisions of "Project:HackSat One"

From London Hackspace Wiki
Jump to navigation Jump to search
 
(65 intermediate revisions by 3 users not shown)
Line 1: Line 1:
−
[[File:Hacksat1-mission-patch.png|right]]
+
{{Project||created=10/10/2011|status=Mission Failed|members=[[User:Flux|Flux]], [[User:Datagramm|Samuel]]}}
 +
[[File:Hacksat-devboard-hand.jpeg|thumb|right|Dev board for HackSat One]]
 +
[[File:Radio-testing-at-london-hackspace.jpeg|thumb|right|Radio testing with Samuel]]
 +
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]].
  
−
'''See https://flux.org.uk/projects/hacksat/ for latest info. Dev board should be going to board house imminently. Flux will update the wiki in July 2012.'''
+
__TOC__
  
−
'''HackSat1''' will be a sprite: a tiny independent satellite. It's due to launch in 2013 as part of the [http://kicksat.org KickSat] swarm. The primary goal of the project is to receive signals from HackSat1 at a [[Project:Hoxton Space Centre|ground station]] in the [[Laboratory 24|London Hackspace, Hoxton]]. In the longer term we hope to design and launch our own hardware.  
+
=== Mission Update: 14 May 2014 ===
 +
I'm sad to report that HackSat will not be stretching its solar panels
 +
after all. HackSat likely re-entered overnight whilst still inside
 +
KickSat.
  
−
All the sprites in the KickSat swarm will have the same hardware design. So focus is on the software and ground station. Speak to [[User:Flux|Flux]] if you're interested in getting involved.
+
HackSat launched on 18th April inside the KickSat satellite. KickSat
 +
started out in an orbit of 299 by 331 Kilometers at an inclination of
 +
51.65 degrees. This is a low orbit and subject to a significant amount
 +
of drag.
  
−
== Current Activities ==
+
Sixteen days after launch, KickSat was due to deploy HackSat and its
−
* 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]].
+
other satellite sprites. The delay was required by Nasa to avoid
−
* Working out the [[Project:HackSat1 Payload|payload]]
+
interfering with ISS operations. This meant HackSat would have began
−
* Working out what's needed for [[Project:Hoxton Space Centre|Hoxton Space Centre]] (ground station)
+
orbiting on 4th May.
  
−
== Sprite Hardware ==
+
On 30th April the watchdog microcontroller that runs the KickSat timer
−
We don't get to design the hardware on this mission, just program it. The current KickSat code is available on [https://github.com/zacinaction/kicksat GitHub]. Development of HackSat specific code is due to being summer 2012.
+
reset, probably due to a cosmic ray. This pushed the deployment of
 +
HackSat out to 16th May. Attempts to manually deploy HackSat via the
 +
uplink failed: the KickSat batteries never reached a high enough
 +
voltage to enable the uplink receiver.
  
−
* MSP430 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)
+
Since launch signals from KickSat have been regularly received by
−
* sensors: temperature + one other TBC (KickSat are taking suggestions)
+
ground stations around the world. Recent orbital predictions suggested
−
** According to a [http://www.kickstarter.com/projects/zacinaction/kicksat-your-personal-spacecraft-in-space/posts/247545 kickstarter update], the latest dev boards have a magnetometer and a gyro onboard. No mention of the temperature sensor. (The MCU has a temperature sensor build-in)
+
that re-entry was likely 13-14th May. No stations have reported
−
* radio: we can transmit what and when we like (subject to solar power) but data rate is only a few bits per second
+
hearing KickSat overnight, so it seems very likely it has already
−
**Signals cannot be sent to the sprite: communication is strictly one way (from sprite to ground station)
+
re-entered.
  
−
''"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"''
+
- [[User:Flux|Flux]] ([[User talk:Flux|talk]]) 09:40, 14 May 2014 (UTC)
  
−
== The Launch ==
+
=== Schedule ===
−
July 2013 on Space X Falcon 9 rocket as part of ELaNa 5 / CRS 3.
+
After several launch delays, KickSat is now in low Earth orbit.
  
−
== The Orbit ==
+
HackSat and the other sprites will be deploying ~ 20:00 UTC on 4th May.
−
''"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 height - 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).
+
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).
  
−
B.t.w. [http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4526281 "Criteria and Trade-offs for LEO Orbit Design" in IEEE Xplore] has a pretty good overview.
+
=== Software Payload ===
 +
HackSat broadcasts a simple set of data on temperature, magnetic field and angular velocity. It will also broadcast the HackSpace URL: http://hack.rs
  
−
== Useful Resources ==
+
If you're interested in trying to receive the signal from HackSat (and
−
* [http://hackaday.com/2011/11/21/tracking-satellites-with-an-arduino/ Tracking satellites with an Arduino]
+
the other KickSat sprites) yourself see [https://github.com/zacinaction/kicksat/wiki/Setting-Up-A-Ground-Station setting up a ground station].
−
[[Category:Satellites|H]]
 
−
* [http://events.ccc.de/congress/2011/Fahrplan/events/4699.en.html Building a Distributed Satellite Ground Station Network - A Call To Arms]
 
  
−
''Mission patch created by Nick Cramp.''
+
=== Hardware ===
 +
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:
 +
 
 +
* '''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]]
 +
* '''InvenSense ITG-3200 Gyroscope''' (orange) [[https://www.sparkfun.com/datasheets/Sensors/Gyro/PS-ITG-3200-00-01.4.pdf datasheet]]
 +
* '''Honeywell HMC5883L Magnetometer''' (blue) [[http://www51.honeywell.com/aero/common/documents/myaerospacecatalog-documents/Defense_Brochures-documents/HMC5883L_3-Axis_Digital_Compass_IC.pdf datasheet]]
 +
* '''TXC 7Z-26.000MDG-T Oscillator''' (purple)  [[http://www.txccrystal.com/images/pdf/7z.pdf datasheet]]
 +
* '''Nitinol antennas''' (extend off top right of photograph) [[http://en.wikipedia.org/wiki/Nitinol nitinol info]]
 +
 
 +
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].
 +
 
 +
''NB. The dev board (pictured) has a different oscillator to that mentioned above.''
 +
 
 +
[[File:Annotated-kicksat-dev-board.jpg]]
 +
 
 +
=== Decal ===
 +
[[File:Hacksatone-mission-decal.png]]
 +
 
 +
 
 +
''Decal created by Nick Cramp.''
  
 
[[Category:Projects]]
 
[[Category:Projects]]
 +
[[Category:Satellites]]

Latest revision as of 09:41, 14 May 2014

Retrieved from ‘https://wiki.london.hackspace.org.uk/w/index.php?title=Project:HackSat_One&oldid=41423’