EOSS Flight Archives

EOSSP-3/4 Pico Balloon Launch at HAMCON 2025 - Recap

Monitor all four EOSS pico balloons here.

EOSS-383 NDIA Flight - Recap

(Draft of flight summary)

EOSS-383 was launched at 7:25 a.m.on Saturday, October 17, 2025 from the Limon Softball Complex and achieved an altitude of 96,548 feet before cutdown and release of the parachute which brought the payload safely to rest at 09:48 AM in far eastern Cheyenne County near the intersection of CO State Hwy 385 and  County Road Y (38.9233333,-102.3451667).

EOSSP-2 Pico Balloon Launch - Recap

This isn't really a Recap, because the pico balloon is still flying, as of June 8, 2026 (day 263) it has made eighteen circumnavigations of the world (see map in Charts & Data).

EOSS-381 &382 Colorado Space Grant Consortium Summer Launch - Recap

This will henceforth be known as the EOSS 381/382 Fog, Battery, Brakes, Fork Flights. Two 1500g balloons were launched from the Limon Soft Ball Fields on Saturday, August 2, 2025.

EOSS-380 BAE BIRST - Recap

EOSS FLIGHT 380 a 3000g balloon was launched at 7:10am Saturdat July 26, 2025 from Genoa Campground. It carried two payloads designed and built by BAE Systems Interns. Picture perfect launch with a little dance done by the last two payload handlers.  They followed instruction perfectly. Great Job. The balloon birst at 98,184ft, and landed at 39.59657, -103.46211, or County Rd 2 and County Road P. This might be the first time the land owners phone number was on the corner post of the field! It warned about hunting without written permission and gave two numbers.

EOSS-379 Youth on the Air - Recap

 

One 1500g balloon was launched on Tuesday, June 17, 2025 from VFW Post 7945, Thornton, CO and reported a maximum altitude of 96,874 ft. A successful recovery was achieved in north Adams County at 40.03883, -104.3635. A detailed summary of the flight will follow soon.

EOSS member mileage reimbursement submission here

EOSS-378 Great Plains Superlaunch - Recap

GPSL launch scheduled for June 14, 2025 at 7:30am in Buhler KS was put on a weather hold. We sat in the hotel breakfast area watching the rain falling sidewise because of high winds and looking for tornadoes.  We heard from Zack that the rain would stop and the skies would clear for an 1:00 pm launch.  We headed to Buhler around 11:30am to set up.EOSS launched one 2000g balloon with our scheduled payloads and added two additional beacons with Horus binary.  With help from other teams our balloon was up and away.  We stayed at the launch site and helped other teams launch.

EOSS-376 and EOSS-377: DSST /Wheatridge HS - Recap

May 10, 2025

Two balloons were launched and payloads recovered successfully.

EOSS-376, a 1500g latex balloon carrying an exempt payload of CubeSats for DSST Cedar High School students was launched from the Limon Softball Fields at 6:55 a.m. It reached an altitidue of 92500 feet before burst, and its parachute carried the payloads to landing near Colorado State Highway 71 and County Road 2K in Lincoln County, about 23 miles south of Limon, CO.

EOSS-374/375 Gateway to Space - Recap

Summary:

Two 1500g balloons were launched with exempt payload strings on Saturday, May 3, 2025 from Limon Colorado. This was the third attempt to launch the Gateway to Space payloads, delayed by weather. All class payloads flew, but sadly some students could not attend the launch because of final exams. The balloons flew as follows

EOSS-372/373 Metro State University - Intro2Space & Littleton EPIC - Recap

A beautiful morning a few light clouds and a big moon.

We launched 2 balloons on April 12, 2025, 373H @ 6:45am with MSU payloads and 372L @ 7:08 am with Littleton EPIC Payloads. Both balloons headed towards Arriba/Flagler CO reaching over 90,000ft.

373 landed closer to Arriba W of hw 63 and S of 3Z.  372 landed north of Flagler at the corner of CR 6 and FF.

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