The High Altitude Balloon (HAB) Mk1 project is a collaboration between three Cornell Clubs:
The goal of the project is to engage in a Hackathon day to build a HAB launch vehicle and payload, and on the following day, launch, track, and recover the balloon payload. In doing so, we hope to give Cornell students some exposure to HAM radio as well as supplement their Cornell education with some additional hands-on engineering experience.
We plan to launch a latex weather balloon with a Raspberry Pi and camera payload, transmit images back to ground using SSTV, and track the balloon using APRS. To cover a broad array of interests, we will offer several sub projects such as antenna builds and the various balloon subsystems.
|Launch Vehicle||Latex Weather Balloon||Latex Weather Balloon + H2|
|Payload||APRS, SSTV, Pi Camera||Ursus Minimus, SSTV, Raspberry Pi, Radio|
|Payload container||CAD design, 3D print?, styrofoam?|
|Max Payoad Weight||730g|
|Flight Time||45-90 min|
|Cutdown A||Nichrome + Accelerant|
|Cutdown B||Balloon Failure|
|Latex Weather Balloon||$25|
|Bottle of H2, filling gear||(Assuming half bottle, not including bottle and regulator) $45|
|Raspberry Pi Camera Module||$30|
|Baofang UV5R Radio||$30|
|AAA Batteries (16 count includes testing)||$27|
|Payload radio cabling||Donated by CARC|
|Ursus Minimus Tracking||Donated by CARC|
|Microcontroller and cutdown technology||Donated by CARC|
|Foam for recovery package||Donated by CARC|
|Batteries - (3) AA||45|
|Total (730 max)||656|
|APRS Tracking setup - radio, laptop, etc||CARC members|
|BNC connector hardware||$20|
|Web server||Donated by KC2WAC|
As we mount more balloon missions, it would be beneficial to have a fixed doppler station for DF purposes. That way, even with only one mobile bearing we might be able to triangulate. This will also be a useful addition to foxhunts.
There are several kits for building DF dopplers, the most popular of which seems to be the PicoDopp. Other doppler kits are approximately the same cost and complexity, so the total parts bill would be approximately $200.
We can install a 2m and 70cm doppler array on the roof of Barton and put it on the internet for remote usage.