Feeds

LOHAN serves up Raspberry Pi sensorgasmotry

Inside our spaceplane mission's fruity electronics

Secure remote control for conventional and virtual desktops

Taking snaps 19 miles above Earth

We had two of these lightweight gadgets for the mission - one in the CHAV and another in the main payload box - both acting as back-up trackers.

Anthony's PAVA tracker on the scales at 4.98g

Anthony brewed up the PAVA with a view to making a tracker "small enough and power efficient enough to be run from a single battery for enough time for a flight and possibly to reside in the neck of a balloon".

Cue an ATMega328P Microcontroller, Ublox MAX6 GPS and a HopeRF RFM22B radio module and you've got a tracker small enough to insert into the CHAV's fuselage through a small aperture:

Anthony installs the PAVA tracker the in CHAV's fusleage

Both units performed impeccably during the flight, as did the PiCam:

Montage of flight images from the Raspberry Picam

Another montage at altitude from the Raspberry Picam

Montage of images from the Picam at around 100,000ft

Dave said of the mission: "For me the impressive thing was the camera and Pi kept working with outside temperatures down to -60°C with minimal insulation."

Indeed, and at the end of this vid of some of the flight footage, you can see the PiCam video grab from 2,000m to the tree near Perham Down on the edge of Salisbury Plain, where the flight ended:

Watch Video

All in all, then, a great success for the LOHAN electronics chaps. As a final bonus, Dave provided this "sensorgasmotry" from the Pi, representing around three minutes either side of the landing:

Graph showing data from the Raspberry Pi sensors

Dave explained: "The green line is the air pressure. This increases from 820mb at an altitude of around 1,800m to 1007mb at landing and is then constant.

"The purple jagged line going through it is the temperature, gently rising from 8°C to 21°C, and still getting warmer in the tree (which provided shelter from the wind).

"The three lower lines are accelerometer readings from the 3-axis magnetometer. The fact that the yellow line flips from negative to positive shows that the plane ended up inverted after the collision with the tree"

In case you're wondering, the negative to positive flip was because the Pi was mounted upside down in the CHAV, so the sensor correctly read this initial inversion.

The minimum recorded temperature was -47°C, although "it would have been colder, but sunlight heats the sensor", as Dave put it. The minimum pressure recorded was 5mb, though this is beyond the specification for the IMU. ®


Further LOHAN resources:

  • New to LOHAN? Try this mission summary for enlightenment.
  • You can find full LOHAN coverage right here.
  • Join the expert LOHAN debate down at Reg forums.
  • All the LOHAN and Paper Aircraft Released Into Space (PARIS) vids live on YouTube.
  • For our SPB photo archive, proceed directly to Flickr.
  • We sometimes indulge in light consensual tweeting, as you can see here.

LOHAN - A Special Projects Bureau production in association with...

  • 3T RPD logo
  • University of Southampton logo
  • Applied Vacuum Engineering logo
  • Escher Technologies
  • Flashpoint Fireworks logo
  • HAB Supplies logo
  • Rock 7 logo

Paper Aircraft Released Into Space

Next gen security for virtualised datacentres

More from The Register

next story
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
TRIANGULAR orbits will help Rosetta to get up close with Comet 67P
Probe will be just 10km from Space Duck in October
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.