EOSS-205/206 Fun Flights, March 14, 2015 - Recap

The EOSS Fun Flight was a success for our three STEM payloads and one club member payload, and a trying day for our beacon builders. Work continues on getting the new beacons into flight-ready conditions.

EOSS-205 AND 206 launched from Deer Trail at 0720 and 0732. Both balloons flew south and landed near Rush, Colorado (yes, it does have a Post Office). Student payloads were all a success and EOSS gained valuable experience with our new beacons.

Our STEM programs have generated some press coverage, promoting the good work the students did. See coverage of the NSSTI Pongsat program here, and the Montclair School fo Academics and Enrichment 4th Grade science project here.

Original Announcement: 

The EOSS Fun Flight is now two 1600g balloons. We will be carrying three STEM program payloads and flight qualifying three new EOSS beacons.

  • Montclair School of Academics and Enrichment in Denver will be flying a 4th grade-designed payload with cockroach and tardigrade astronauts on board.
  • National Space Science & Technology Institute in Colorado Springs will be flying 50 pongsats built by middle and high school students.
  • A Standley Lake High School Earth Sciences project will be flying a radiation sensor experiment.

EOSS will be flight qualifying two beacons built by NØIX and two built by KØSCC. KCØRPS will be flying an experiment with two Geiger counters on board.

Pongsats Ready to Fly!



Click here for the Fligthpath Prediction. If you look at the current prediction under EOSS-205, Click on the "GIF" link for the most recent initialization date and time, the prediction takes the balloon down into DIA airspace. Look for the link that says "Predictions for alternate sites" and look at the EOSS-205 prediciton for Deer Trail. This looks like the best bet. The prediction will update every 24 hours.

 Click here: for EOSS 205/206 Millage Reimbursement form THis flight will not be reimbursed but we want to test the form and have some recordsof the flight. 

Event Date: 
Saturday, March 14, 2015 - 00:00
Flight Coordinator: 
Launch Site: 
Punkin Center 65,45 Grid Test N 38.6289, W 104.7226 -- X 10 Y 30


This is the first of two balloons for the EOSS "Fun Flight"This balloon carries two flight beacons, two new beacons for flight qualification, two STEM payloads, and one EOSS memeber experiment.This balloon will launch at 7:15am.

Balloon Type: 
Hwoyee 1600g
5 ft with fast release mechanism
144.340 MHzKCØUUO-11APRS and DigipeaterTimeslotted on :15 & :45 seconds after the minute
147.420 MHzKØSCC-11DF/APRS/CutterSecondary Beacon
146.40 MHzAEØSS-13APRSTimeslotted on :00 & :30 (Flight Qualification)


This is the second of two balloons for the EOSS "Fun Flight"The balloon carries a flight beacon, a DF flight beacon, a STEM payload, and two new beacons for flight qualification.This balloon will launch at 7:30am.

Balloon Type: 
Hwoyee 1600g
8.5 ft with fast release mechanism
147.555 MHzAEØSSCW/Cutdown
144.340 MHzAEØSS-11APRS/DigipeaterTime Slotted on :00 & :30 Primary Beacon
145.600 MHzKEØBMV-11APRS/DF/CutterFlight Qualification
146.400 MHzAEØSS-12APRSTime Slotted :15 & :45 (Flight Qualification)

Preflight Net:

  • 147.225 MHz CRA Repeater (107.2 Hz Tone) 8 pm MDT preceding night
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the CRA machine is down
  • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency

Recovery Operations:

  • 448.450 MHz PPFMA (100.0 Hz Tone)
  • 446.100 MHz Field Simplex for EOSS #205
  • 446.150 MHZ Field Simplex for EOSS #206
  • 446.275 MHz Travel Simplex for inter-traveler comms enroute to recovery sites

Launch Site Simplex: 146.550 MHz

HF - Possible ops: 7.235 LSB

Tactical Calls: 
TacticalCall SignNameNotes
AlphaWA0GEH, KC0D, N0KKZMarty, Mark, RickAlpha, Prognasticator
BravoW9CN, KE0CQQMike, RyanAlpha, Tracker
CharlieKE7KCKTom, Norm BlackTracker, NSSTI Official
DeltaK0SCC, KE0BMVStephen, ParkerTrackers, Investigator
GolfKC0UUO, N0IXRob, DougTracker, Investigator
HotelKC0RPS, W0NFW, KA5IGCJim, George, VinceTracker, Flight Coordinator
TR Breakfast: 
Breakfast at Limon, McDonalds.