{"guid":"9ab2952e-ac75-5a68-a15e-4f75cc95ad91","title":"How to build and launch a high-altitude balloon project","subtitle":null,"slug":"why2025-173-how-to-build-and-launch-a-high-altitude-balloon-project","link":"https://program.why2025.org/why2025/talk/RC9LR7/","description":"If you want to try something new, unusual, and technically creative, try high-altitude ballooning! In this short presentation, I'll share my experiences from a series of three high-altitude balloon projects. These projects included launching sensor payloads to altitudes about 25km and live HD video transmission from the stratosphere. You will learn how to prepare your payload, how to track its position and telemetry data using solutions, and even how to rescue a landed payload from a tall tree!\n\nLicensed to the public under https://creativecommons.org/licenses/by/4.0/","original_language":"eng","persons":["Aleksander Parachniewicz"],"tags":["173","2025","why2025","Wonderful creations","Delphinus","why2025-eng","Day 3"],"view_count":270,"promoted":false,"date":"2025-08-09T12:35:00.000+02:00","release_date":"2025-08-09T00:00:00.000+02:00","updated_at":"2026-03-21T15:15:04.997+01:00","length":1838,"duration":1838,"thumb_url":"https://static.media.ccc.de/media/events/why2025/173-9ab2952e-ac75-5a68-a15e-4f75cc95ad91.jpg","poster_url":"https://static.media.ccc.de/media/events/why2025/173-9ab2952e-ac75-5a68-a15e-4f75cc95ad91_preview.jpg","timeline_url":"https://static.media.ccc.de/media/events/why2025/173-9ab2952e-ac75-5a68-a15e-4f75cc95ad91.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/events/why2025/173-9ab2952e-ac75-5a68-a15e-4f75cc95ad91.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/why2025-173-how-to-build-and-launch-a-high-altitude-balloon-project","url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_title":"What Hackers Yearn 2025","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025","related":[],"recordings":[{"size":570,"length":1838,"mime_type":"video/webm;codecs=av01","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_av1-hd.webm","state":"new","folder":"av1-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2025-08-10T00:56:43.912+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/av1-hd/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_av1-hd.webm","url":"https://api.media.ccc.de/public/recordings/89107","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":19,"length":1838,"mime_type":"audio/opus","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_opus.opus","state":"new","folder":"opus","high_quality":false,"width":0,"height":0,"updated_at":"2025-08-09T23:55:27.287+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/opus/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_opus.opus","url":"https://api.media.ccc.de/public/recordings/89082","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":28,"length":1838,"mime_type":"audio/mpeg","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_mp3.mp3","state":"new","folder":"mp3","high_quality":false,"width":0,"height":0,"updated_at":"2025-08-09T23:55:23.573+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/mp3/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_mp3.mp3","url":"https://api.media.ccc.de/public/recordings/89081","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":550,"length":1838,"mime_type":"video/webm","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_webm-hd.webm","state":"new","folder":"webm-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2025-08-10T01:15:49.294+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/webm-hd/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_webm-hd.webm","url":"https://api.media.ccc.de/public/recordings/89119","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":157,"length":1838,"mime_type":"video/webm","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_webm-sd.webm","state":"new","folder":"webm-sd","high_quality":false,"width":720,"height":576,"updated_at":"2025-08-10T00:48:05.431+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/webm-sd/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_webm-sd.webm","url":"https://api.media.ccc.de/public/recordings/89103","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":230,"length":1838,"mime_type":"video/mp4","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_sd.mp4","state":"new","folder":"h264-sd","high_quality":false,"width":720,"height":576,"updated_at":"2025-08-10T00:08:00.462+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/h264-sd/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_sd.mp4","url":"https://api.media.ccc.de/public/recordings/89088","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"},{"size":1475,"length":1838,"mime_type":"video/mp4","language":"eng","filename":"why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_hd.mp4","state":"new","folder":"h264-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2025-08-09T23:54:30.995+02:00","recording_url":"https://cdn.media.ccc.de/events/why2025/h264-hd/why2025-173-eng-How_to_build_and_launch_a_high-altitude_balloon_project_hd.mp4","url":"https://api.media.ccc.de/public/recordings/89080","event_url":"https://api.media.ccc.de/public/events/9ab2952e-ac75-5a68-a15e-4f75cc95ad91","conference_url":"https://api.media.ccc.de/public/conferences/WHY2025"}]}