EOSS Upcoming Flights

EOSS-374 Gateway to Space

05/03/2025 - 00:00 to 23:45
Denver School of Science and Technology (DSST)

05/10/2025 - 00:00 to 23:45
EOSS Pico Balloon

05/24/2025 - 00:00 to 23:45
Great Plains Superlaunch

06/14/2025 - 00:00 to 23:45
Youth on the Air

06/17/2025 - 00:00 to 23:45
BAE BIRST

07/26/2025 - 00:00 to 23:00
Colorado Space Grant Consortium Summer Launch

08/02/2025 - 00:00 to 23:45
HAMCON 2025

10/23/2025 - 00:00 to 23:45
Metro State University - Intro2Space

11/01/2025 - 00:00 to 23:45

EOSS Flight Archives

EOSS-253, 254,255,256 COSGC DemoSat and BIRST Flights - Recap

Submitted by Tom Londrigan (... on Fri, 07/14/2017 - 10:55

EOSS-253, 254, 255, and 256 were launched in rapid succession starting at 0700 from the Limon Softball fields launch site on July 15, 2017. All were 1500g exempt balloons.
EOSS-253 reached an altitude of 98,885 ft
EOSS-254 reached an altitude of 100,795 ft
EOSS-255 reached an altitude of 97,847 ft
EOSS-256 reached an altitude of 96,219 ft
All payloads were recovered north of Matheson, CO. Recap galleries have been created below. Check back for updates to Charts, data and photos as they are loaded.

Read more about EOSS-253, 254,255,256 COSGC DemoSat and BIRST Flights - Recap

EOSS-252 Great Plains Super Launch - Recap

Submitted by KCØRPS on Mon, 05/01/2017 - 18:48

EOSS-252 was launched from the Hutchinson Kansas Airport as part of GPSL, and recovered southeast of Newton, Kansas. It achieved an altitude of 98,990 ft.

Altitude vs. Time plots from aprs.fi have been added. Please add any pictures to the galleries below.

Read more about EOSS-252 Great Plains Super Launch - Recap

EOSS-250 and 251 Eclipse Practice Flight, COSCG - Recap

Submitted by Tom Londrigan (... on Sun, 04/30/2017 - 11:54

Updated 5/20/17: Posted additional pictures to Prep and launch gallery.

EOSS-250 and 251 were launched from Guernsey, Wyoming and recovered northeast of Lusk, Wyoming. EOSS would like to thank WA7SNU, AE7AF, KD7JNQ and all the local Wyoming hams for help in setting up communications to support this flight.

Read more about EOSS-250 and 251 Eclipse Practice Flight, COSCG - Recap

EOSS-247/248/249 Metro State University Intro to Space - Recap

Submitted by KCØRPS on Mon, 04/17/2017 - 18:46

Three balloons were successfully launched and retrieved, with a little rain and some muddy roads and fields.

EOSS-247 Burst at 95,382 ft and landed at 38.986624, -102.990035
EOSS-248 Burst at 92,282 ft and landed at 39.05677, -103.12716
EOSS-249 Burst at 96,748 ft and landed at 39.1470, -103.2405

Mileage link for EOSS members.

Read more about EOSS-247/248/249 Metro State University Intro to Space - Recap

EOSS-241, 242, 243, 244, 245 246 - Recap

Submitted by Tom Londrigan (... on Mon, 04/10/2017 - 08:31

Submit mileage here: Mileage Form Charts and Data, Launch and Recovery Photo galleries posted below.

Altitude vs. Time for 241,242,243,244, 246 posted.

Read more about EOSS-241, 242, 243, 244, 245 246 - Recap

EOSS-238/239/240 STEM Flight - Recap

Submitted by KCØRPS on Sat, 03/11/2017 - 17:22

More graphs and data, and a few in-flight pictures posted.

National Space Science & Technical Institute (NSSTI) has posted a YouTube flight video captured during the flight of EOSS-240. An updated "Director's Cut" video is posted here.

Read more about EOSS-238/239/240 STEM Flight - Recap

EOSS-237 Eaton MS Flight - Recap

Submitted by KCØRPS on Tue, 01/03/2017 - 21:38

Additional pictures added.

The balloon launched at 0831 and landed at 1218. It flew approximately 116 miles and landed at 40.96950, -102.57883, 3-1/2 miles northwest of Sedwick, Colorado. The balloon reached a height of 94,963 ft. After landing, the parachute dragged the payload string 962 feet. Good payload construction saved all the experiments!