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A look at recent events and member projects
This blog post contains images from the balloon taken by two of the three Raspberry Pi Zero cameras on-board. Unfortunately the third suffered catastrophic data loss (probably upon landing) and everything on its SD-card was lost. One of the Pi cameras faced outward from the side of the payload and the other at about a 30° angle off of straight down.
The balloon was kitted out with cameras, sensors and way-finding equipment. After being aloft for about 3.5 hours, the increasing altitude contributed to the balloon’s anticipated popping and rapid fall back to earth. It traveled around 100 miles, capturing video and photos before, during and after the eclipse.
This project page from our Wiki, prepared pre-launch, contains a wealth of details about the endeavor, including specs of the equipment, testing needs, and compliance considerations leading up to the launch. Member Dan Julio also posted about the project on Hackaday.
The balloon crew included SSD members Brandon Skari, Dan Julio, Tim Pegg, Andrew Bigoney, Specter, Rob Bryan, Sarah Gjestvang, along with additional crewmembers Kate, Bob, Tessa, Jason, and Sarah’s family.
A remote launch site surrounded by land with considerable public access to make recovery easier was carefully researched prior to the launch, though modified after reviewing different wind forecasts. The crew gradually assembled starting Friday night through Sunday, traveling from Boulder to an area about 10 miles ESE of Shoshoni Wyoming. The group split into three teams: a launch team, a recovery team and a remote telemetry receiver in Casper.
Most team members were on the launch team, who released the balloon at about 10:30 am. The initial climb rate of 2.5 m/s was a bit slower than expected and meant that the balloon was ultimately aloft for longer than initially anticipated.
The balloon traveled almost due east, eventually succumbing to the effects of partial vacuum about 20 miles north of Casper after reaching a maximum altitude of over 90,000 feet! At that point the balloon burst, and it and its payload quickly fell to earth. The recovery team, consisting of Kate, Bob, Sarah and her family, found out that the payload had landed on a private ranch. The balloon was found in about 5 hours near the last LoRa telemetry message.
In 360-degree video footage captured aloft during the event, a noticeable shadow can be seen visibly encroaching from the west over the land below. A few minutes later, totality arrived at approximately 11:39 AM. The darkened sky showed stars and the solar corona. The balloon’s cameras continued filming along its eastward trek for almost another hour before the balloon burst.
While not exactly a tradition, we have these combination bbq / clean-up / build events at least a couple times a year. For example, last fall one of the center tables in the main room of the space was built, and last spring several members built the built-in wall-side table that is also in the main room.
A few of the other many accomplishments included: Brandon tackled the floors in the metal shop and beyond, Jay transferred items cluttering up common areas to the member and other storage shelves, Nick got the mask glowing again, and Liz guided several additions to our bios webpage.
Remember to stay tuned to our Meetup page to keep posted on future events!