We present a publicly-available toolkit of flight-proven hardware and software to retrieve 5 TB of data or small physical samples from a stratospheric balloon platform. Before launch, a capsule is attached to the balloon, and rises with it. Upon remote command, the capsule is released and descends via parachute, continuously transmitting its location. Software to predict the trajectory can be used to select a safe but accessible landing site. We dropped two such capsules from the SuperBIT telescope, in September 2019. The capsules took ~37 minutes to descend from ~30 km altitude. They drifted 32 km and 19 km horizontally, but landed within 300 m and 600 m of their predicted landing sites. We found them easily, and successfully recovered the data. We welcome interest from other balloon teams for whom the technology would be useful.

中文翻译：

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降落伞下载：从高空气球上取回资产

我们提供了一个公开可用的飞行验证硬件和软件工具包，用于从平流层气球平台检索 5 TB 数据或小物理样本。在发射之前，一个胶囊被连接到气球上，并随着它上升。根据远程命令，太空舱被释放并通过降落伞下降，不断传输其位置。可以使用预测轨迹的软件来选择安全但可访问的着陆点。2019 年 9 月，我们从 SuperBIT 望远镜上放下了两个这样的太空舱。太空舱花了大约 37 分钟从大约 30 公里的高度下降。他们水平漂移了 32 公里和 19 公里，但降落在他们预测的着陆点 300 米和 600 米以内。我们很容易找到它们，并成功恢复了数据。我们欢迎其他对该技术有用的气球团队的兴趣。