The University of Texas at Austin
  • 3…2…1…Liftoff!

    By Gracelin Baskaran, Department of Aerospace Engineering and Engineering Mechanics
    Published: April 29, 2013

    Designing, Building and Launching a BalloonSat

    Extremely high winds made for a very difficult launch. The balloon is shown here seriously deformed from high winds. WIALD team members scrambled to keep the balloon off the ground while the payload teams ran downwind.

    Extremely high winds made for a very difficult launch. The balloon is shown here seriously deformed from the wind. WIALD team members scrambled to keep the balloon off the ground while the payload teams ran downwind.

    As members of the Women in Aerospace for Leadership and Development (WIALD) student organization launched their payloads from a weather balloon on a windy Texas morning, they bid farewell to Bevo the Dragon, with high hopes that their miniature satellites would be retrieved and intact after landing.

    Working in two teams, WIALD members spent the fall and spring semesters designing and building BalloonSats — small, simple packages that carry lightweight experiments to the edge of space. The goal of the project was to design, build and test multiple payloads, then launch them aboard a weather balloon to over 100,000 feet in altitude. Each BalloonSat contained components including a GPS unit, accelerometer, temperature sensor, data logger and camera. The trial project was designed as a test mission and, if successful, could eventually be incorporated into the introductory aerospace engineering course.

    The teams arrived at Hillsboro Municipal Airport at daybreak on April 6 and began to prepare for launch in the large hangar. They laid out the balloon on a clean surface, inflated it, prepped all of the payloads and created harnesses to hold them, conducted systems checks and performed a final integration. The payloads were tied together as the balloon was inflated. [View a slideshow of their launch preparation.]

    Once the group was finally ready to launch, gusts of wind began reaching up to 30 mph. Winds were so strong that it took seven women to hold the 50-pound launch unit to the ground. Launch was further delayed by an airplane dropping skydivers overhead. Then, seconds before final liftoff, Ciara Waldron noticed severe balloon disfiguration and was sure the balloon had popped. Fortunately, it was strong winds causing the disfiguration — the balloon had not been damaged.

    Finally, after all obstacles were overcome, liftoff became a reality. As the balloon whipped around in the gusty winds, the women ran along with it, holding onto their payloads, until the entire balloon and all attachments were carried away into the sky.

    “This project was our most exciting yet,” Pinto said. “We created everything that went up — procured the balloon, picked the tether line that tied everything together, figured how much helium we needed and more. We designed the entire system ourselves. It was so rewarding.”

    Immediately after the launch, WIALD members entered chase mode. Using the payload’s automatic packet reporting system (APRS), Nicole Pinto and Waldron began tracking the balloon’s position, which was being transmitted through a frequency for amateur radio operators. Nearby amateur operators who were listening in also came out to help them track and locate the balloon.

    Nearly an hour later, the payloads landed flawlessly, but their location was somewhat difficult to access. The last packet of APRS data was sent from 3,000 feet, so there was quite a stretch of land to search. First, they suspected it had landed in a lake. Fortunately, it had landed safely on a patch of green grass between a lake and a river.

    But there was just one problem — the payloads landed on private property. With a little coaxing, WIALD members were able to gain access to the property from the owners. Team leaders and project managers finally located the balloon — it was laid out so perfectly that when they took photos and sent them to other members, they thought the photo was staged. All of the payloads were in excellent condition.

    After completing the mission successfully, WIALD members believe this project is perfect for the aerospace engineering introductory course.

    “This is terrific,” Waldron said. “Participating in a project like this that has such visual and scientific rewards so early in students’ careers will be inspiring. There’s no feeling like launching something into space and getting it returned safely.”

    For more information, photos and video of WIALD’s BalloonSat launch, visit

    Our thanks to Millennium Engineering and Integration Company for funding WIALD’s balloon satellite project. This is the second year in a row that Millennium has been the primary benefactor for WIALD’s hands-on projects. Last year, WIALD launched three IMU payloads to the edge of space aboard a U.S. Air Force rocket.

    To learn more about student projects and/or to support our student teams, please contact Amanda Brown at 512-471-4046 or

    A version of this story originally appeared on the Department of Aerospace Engineering and Engineering Mechanics website.

    • Quote 2
      Kevin Van Genechten said on May 12, 2013 at 7:42 a.m.
      Wow,this is awesome. Great job Wiald girls! Where can we read the results of the project? :)
    • Quote 2
      Heather Scoggins said on May 9, 2013 at 10:01 p.m.
      That is pretty cool, did make me a little dizzy though. Lol. Good job WIALD girls.
    • Quote 2
      Jatekok said on May 9, 2013 at 10:35 a.m.
      Awesome guys! Thats so cool. Great job. The first photo is little funny, you want to catch the flying balloon. Sorry, i cant take it. Seriously, I thank you for sharing these pics and video with us. And I wish You more successfully Balloon project.
    • Quote 2
      Melanie Gulick said on May 6, 2013 at 2:23 p.m.
      This was really exciting! Great job, WIALD team.
    • Quote 2
      Austin said on May 4, 2013 at 4:06 p.m.
      Looks like you guys had a lot of fun. Thanks for sharing the pics and video with us.
    • Quote 2
      Keila Luna said on May 4, 2013 at 11:21 a.m.
      That is so cool! Great job WIALD girls!
    • Quote 2
      brandon said on May 1, 2013 at 12:23 p.m.
      who fun is it to be on ut campas
    • Quote 2
      Andrea Zabcik said on April 30, 2013 at 2:03 p.m.
      Awsome. So much fun to watch. The warning about dizziness was much appreciated.
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