# Space Camera 1

Project Hollands Hoogte: Scientific / Educational High Altitude near-space balloon project from The Netherlands
“Project HoHoHo I”
Buy a balloon, put helium in. Attach a camera, and let it go, then pick it up when it lands! Sounds easy? It is! We put a GPS device in the balloon, that broadcasted its location through radiosignals so we knew where it was during flight. So we picked it up from the ijsselmeer, where it landed. It taped video and took many pictures on its journey through 32km of atmosphere. It’s result is displayed below.

#### First a picture!

Oh hi: it's Friesland from 31km!

Tracked it with GPS, that we picked up in the car with a radio, and got an sms from the payload when it splashed down in the middle of the ijsselmeer. Asked someone for a boat, and chased the payload, and found it, still making pictures! Hence the pictures here..

that includes the trajectory on the earth, including thumbnails of ALL the pictures taken over north holland! It’s only 3Mb big.

## Flight Statistics

 Cost €250 Launch 01-08-2010 (11:35 GMT+1), Heiloo, Northern Holland (Netherlands) Recovery 14:25 Time-to-ground ~1:52h Float-time 58 min Max. Altitude 31.300 meter Weight ~1000g Contents Sensors, Flightcomputer (x1), GPS (x2), Camera (x3) # Pictures 700 Pictures # Video 111 min + 61 min

OK Time to watch the video that sums it all up. Don’t hesitate to drop a comment! You can leave a comment at the bottom of this page, or per picture individually!
Scroll down for pictures and movies!

## Video: Compilation

We tracked the balloon live from the car on google maps

It splashed down in the Ijsselmeer. We just asked someone's boat and picked it up! (see the end of the video)

These were all the GPS positions that we received from launch to splashdown (you can download this data if you scroll down))

## Pictures!

Red=Did not work  Green=Worked

 Canon A720IS Videotaped for 1:30 hours Canon A560 Took >700 pictures in 3:00 hours Spycam Keychain HD Videotaped 58min Parachute Worked but tangled Radio Radiometrix NTX2-10mW @ 434.650MHz RTTY 50b, 7n1, 350Hz shift GPS Tyco Vinotech Sirf III (from Libelium) GPS Falcom FSA03 (ublox) Flightcomputer Arduino Mega (1280)

## More Video’s…

##### All 700 pictures stitched into a video:

[.kmz] Google Earth Trajectory file: HoHoHo_1.kmz WITH IMAGES

## Telemetry Data

Altitude record
\$\$TBL,328,13:05:41,52.8731,5.0361,31303,F*2E
First telemetry after release
\$\$TBL,41,11:35:30,52.6052,4.6997,2,T*0F
Last Telemetry before crash
\$\$TBL,395,13:26:21,52.9488,5.1544,248,F*23
Duration: 60+27+25=112 minutes

Autoreboot after spashdown/crash:
First: \$\$TBB,2,13:27:31,52.9487,5.1555,18,T*0A
Last: \$\$TBL,213,14:27:06,52.9455,5.1657,-4,T*1B
Float duration in water: 58 minutes

Sensory graphs

The formula for the Light Value in the bottom graph is from the camera. (It’s like EV but it takes ISO in account). I had absolutely no idea what exposure you need in “space”, so i set it to automatic. It turns out an EV of around 14 would be best (for instance 1/500 f5.6 ISO100).
$LV=log2(Fnumber^{2}/Shutterspeed/ (ISO/100))$

Some people helped tracking the balloon live with their radio's. One of them from Schotland, 460km away picked up our GPS signals from the balloon!

## Thanks:

Special thanks to: Wouter Dasselaar, the driver of the Pollo; Daniela for filming, Daniel Richman for helping with the code; Terry Baume and Richard Harrison for code snippets, Jon Sowman for setting the tracker; the UKHAS (UK High Altitude Society) team for advice and support and tracking/listening in; CUSF (Cambridge University Space Flight) for hosting the tracker and all that.