Tag Archives: balloon launch

The Mission Ends, and Afternotes

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The Mission Ends

I would not stay around to see the mission end.  Once the instrument was airborne, there was no further purpose for our lab in the airplane hangar, and my job title became moving man and trucker.  The packing went ok, but on the way home I ran into another weather condition: severe thunderstorms.  Driving the broad-sided truck east on Highway 12, it was a challenge to keep it in my lane.  The rain slowed me down but fortunately, the wind was not enough to blow me over.  I thought about how fickle the spring weather in the Midwest could be.  After weeks of steady wind, the short window of calm that permitted a balloon launch was followed by a gale force blast, perhaps to compensate and bring the average wind speed back up to the South Dakota standard.

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Launch at Last!

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Our next opportunity finally arrived two weeks later. Having been through two “dress rehearsals,” we knew what to expect. 

The procedure was to lay out the balloon on a protective tarp on the runway.  The topmost section of the balloon, a small portion that would become the “bubble”, was fed through a retaining “spool” and folded back on itself.  The top section had two tubes, made of balloon material, through which helium would be fed, inflating the bubble, which would gradually ease up from the tarp, eventually becoming large enough to lift itself off the ground entirely, with only the spool and the tension from the uninflated remainder keeping it in place.

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Off Duty, Styrofoam Insulation, False Starts

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Off Duty

While the wind blew, the various research groups and the launch crew prepared and tested their experiments and rigs, like fishermen mending nets to get ready for the next big catch.  At the end of each day we would check the wind conditions and then give up for the day, leaving the airport to seek dinner and retire to our rooms at the Super-8 for a few hours of personal time and sleep before repeating the routine the next day. 

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Setting up Shop, Monitoring the Weather

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Setting up Shop

Scientific balloon launches have been part of NASA’s mission for over 30 years, but in 1977, they were conducted by NCAR– the National Center for Atmospheric Research.  NCAR maintained a balloon launching facility in Texas that had all of the equipment and resources to support experiments like ours.  Unfortunately, Texas was too far south for our experiment.  Instead, we would be operating from makeshift facilities in Aberdeen, a town of 25,000 in an area of South Dakota that offered low population, but enough infrastructure to meet our technical and launch requirements.

There was a regional airport outside of town, and an airplane hangar was provided to house our laboratory field station.  We were not the only researchers, however.  Groups from other universities were also trying to measure the properties of cosmic rays.  We each had a section of the hangar to set up and prepare our experiments for launch.  After packing up our instrument and all the essential support equipment from our 4th-floor lab in the Physics building into a rental truck and driving a day west on Highway 12, we arrived in Aberdeen.  It took us several more days to recreate an operational cosmic ray field lab in the airplane hangar.  

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