How can we use balloons to collect data via small model satellites?
In this mission, we will take to the field to launch our satellites into “orbit!" Using a tethered balloon, we’ll deploy our models to collect information about the local environment, and also create artworks using data, gravity, and environmental conditions.
✋ Multi-Session 🥰 Ages 8+ 🕐 1–1.5 Hours 👩👦👦 up to 20 Participants 🍎 1–2 Facilitators 🎨 Craft Materials
Background & Materials
Balloon launches do NOT work well in the rain (and the satellite prototypes will not, either), so certainly plan a back-up date if your initial launch is washed out. Also, if it's too windy outside it will be easy to get the balloon up, but very difficult to control and gather consistent data. As a general rule of thumb, your body is the best determinant of launch conditions; if you're happy, the balloon will be, too!
Selecting a Field Site
In most areas, you won't need permission to do a tethered balloon launch (but do a quick Google search to double-check). When selecting a field site for launch, the most important consideration is the adjacency of nearby buildings (and power lines). Strive for 50-100 yards of space on all sides from nearby buildings. In our play-testing, we launched from public tennis courts, which worked well, and allowed for safe distancing from trees, buildings, and passers-by.
Plan for one facilitator to deploy the balloon at all times (controlling the tether/slack; must wear gloves at all times), and another to focus on attaching satellites to the tether. At no point should you let patrons have control of the tether line! However, they can help in the attachment process. When starting launch, ensure a safe distance between the balloon and patrons; there is a chance that the CubeSat will detach, the line will break, or that the payload will dislodge from the chassis. You can set up cones or flags to denote the safety perimeter.
Preparing for Launch
Plan for about 45 minutes of prep. time before the start of the workshop: you'll use this time to inflate the balloons, and prepare the tether and rig for attaching patrons' prototypes. Each tank of helium will fill between 2 and 3 mylar balloons. For launch, you'll want to use at least 3 balloons per tether, but you will need more if the prototypes are too heavy or if the line breaks. In total, plan to fill between 6 and 9 balloons. For safety reasons, we recommend only launching one satellite at a time. Use 1–2 carabiners or zip ties to create a rig for attaching balloons; if using zip ties, make sure that you have scissors on-site to easily remove satellites!
Introductory Activity: Safety Orientation and Run of Show
Suggested Timing: 10 minutes
Spend five minutes or so describing the safety protocols as outlined above. Then, depending on the number of satellites you need to deploy, create a rough schedule with order of launch, and equal flight duration for each payload to gather data.
Main Activity: Balloon Deployment!
Suggested Timing: 60 minutes
The focus of this session is to deploy patrons' satellites and payloads on balloons! Because you are using between 4 and 7 balloons, you'll only be able to launch one satellite at a time. Schedule the session such that each patron will have at least three minutes to gather data.
Suggested Timing: 20 minutes
Spend the remaining time allowing patrons to show off the data they've collected! Also reflect on the entire build and launch process:
- What do the data collected tell you?
- What other types of data would you be interested in gathering using this technique?
- Did your satellite perform as expected?
- In what ways would you alter your design for a future launch?