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HacDC Spaceblimp 4

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Revision as of 18:38, 13 April 2011 by Hexagon5un (talk | contribs)

Spaceblimp-4 sucessfully launched and retrieved: April 10, 2011 Sb4 IMG 7739 small.JPG Sb4 path.png


Summary

We launched from Breezewood Elementary School‎ at 1:30 pm, the balloon popped at 2:41 pm at 103,764 ft, and touched back down at 3:09 pm. Again, we were exceptionally lucky with the recovery and were able to drive up to within 200 ft of the package.

Data

On-board Logging

The on-board datalogger keeps records of interior/exterior temperature and GPS data.

Media: SB-4_flight_log.gz (and here's the code in R that generates the above images, and some PDFs to boot: Media: spaceblimp4_analysis.gz)


Sb4 altitude time.png Sb4 gpsHeading time.png Sb4 location.png Sb4 riseSpeed altitude.png Sb4 riseSpeed histogram.png Sb4 riseSpeed time.png Sb4 temp altitude.png Sb4 temp time.png Sb4 windspeed altitude.png

Accelerometer

The accelerometer package flown was the same as last time, with the exception of having half the memory, so there are 50 observations per second. The data are 0-255, with (roughly) 127 being no acceleration. If you graph it, you can clearly see liftoff, popping, and landing. Until we get some time for analysis, the rest is left up to you:

Accelerometer CSV raw data

Photos and Video

Launch Plans (Historic)

Planned launch date: Sunday, April 10, 2011
Launch time: 10:00 AM, Launch should take less than an hour.
Launch Location:
Where: Breezewood Elementary School‎
Address: 133 North Main Street, Breezewood PA 15533-8142
Lat/Long: 39.9970,-78.2440
Coordination/Talk-in: 146.685 MHz simplex
Planned Altitude: 100,000 feet
Planned Ascent Rate: 1,300 ft/min
Planned Descent Rate: 1,000 ft/min
Primary Beacon: Tiny Track 4 with 0.5 W transmitter on 144.390 MHz, call sign W3HAC-11 (map). $3 GPS module
Secondary Beacon: Son-of-WhereAVR with ublox GPS. Yaesu VX-1 handi-talkie with 1 W Transmitter, call sign W3HAC-12 (map), Frequency 432.225 MHz
Payload: Still camera, HD video camera, Geiger counter to measure cosmic rays, a nine degree of freedom Inertial Measurement Unit, accelerometer, pressure, light and temperature sensors.

The balloon is a 2000g Kaymont/Totex with 291 cubic feet of helium. The total weight of the capsule is about five pounds.

HacDC Spaceblimp Project:
Main Page Press Page First Launch (Found) Second Launch (Successful)
Third Launch (Successful) Fourth Launch (Successful) Fifth Launch (3% short of goal) Sixth Launch (Successful) Seventh Launch (Successful)


HacDC Spaceblimp Team Contact Info:
[email protected]
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