EOSS-264 Metro State University Intro to Space, Recap

EOSS-264 was flown sucessfully as a single 3000g balloon under FAA 14 CFR Part 101 rules.The balloon launched at 7:34am and reached an altitude of 107,162 feet. It landed at 40.56792, -102.73136, a distance of 127 miles near Haxtun, Colorado.The mileage link for EOSS members is https://goo.gl/forms/7WzkhIvvhhNIucmB3Drone video of the recovery is posted on youtube: https://www.youtube.com/watch?v=85AUGQyZH14jim was here

Original Announcement: 

Final payload plans posted with only minor changes. 24-hour prediction (the last one) posted here. Winds and skycover look good for launch of a single balloon from Windsor. See you there!

One 3000g balloon carrying payloads for Metro State University Intro to Space classes. The payload plan for that balloon is linked below. If cloud cover does not allow the flight of an exempt balloon, the payloads will be split into two 1500g exempt balloons, each balloon carrying the payloads for one class section. The exempt balloon payload plans are linked here:

The Fatton Stratoranch in Windsor, Colorado has been selected as the launch site for this flight. Directions to the launch site are available at this link. If the predicted winds shift and the flight path enters DIA Class B airspace, the launch site will be moved to prevent this. Watch this website (especially in the three days before the flight) for any changes. If the weather prevents launch the following day (November 5th) has been identified as the weather backup date. That decision is usually made the night before the launch, so watch this website closely!

Predictions can be viewed at www.eoss.org/predict. Find the appropriate flight number (EOSS-264) and the correct date. Then click on the data for the selected launch site. The GIF picture of the predicted flight path is most informative. The prediciton is updated daily at approximately 1:00pm. Check back daily. This website (http://wxqa.com/eoss264.html) contains a number of intersting links with predictions, observations, and links to monitor during the flight that show the location of the balloon.

EOSS is always looking for local hams to IGATE the beacons off of the airwaves and put them on the internet. If you are able to provide this service, please click here and sign up.



EOSS Member Mileage Reimbursement Link

Event Date: 
Saturday, November 4, 2017 - 00:00
Flight Coordinator: 
Launch Site: 
Last Chance: 10,10 Test N40.000 W103.00 Ans: 41.3, 27.9


A 3000g heavy balloon carrying balloonsats developed by Metro State University's Intro to Space classes.

Balloon Type: 
3000g Totex Laytex
10 ft Spherachute with mechanical fast release
144.340 MHzAEØSS-13APRS/Digi EOSSPrimary Beacon timeslotted at :00 and :30
147.420 MHzKCØD-14APRS / DF / CutterSecondary Beacon

Preflight Net:

  • 449.225 MHz RMHAM Repeater (141.3 Hz Tone) 8 pm MDT preceding night
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the RMHAM machine is down
  • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency

Recovery Operations:

  • 449.450 MHz RMRL (103.5 Hz Tone)
  • 446.100 MHz Field Simplex, EOSS #264
  • 446.100 MHz Field Simplex, EOSS #265, if required
  • 146.550 MHz Backup field simplex

Launch Site Simplex: 446.050 MHz

HF - Possible ops: 7.235 LSB

TR Breakfast: 
Breakfast at Country Kitchen in Ramada Inn, east of I-76. Tentative time 6:15, leave at 6:45. This is a very long flight, over 130 miles, so please bring some chow and drinks. The long flight may mean that the trackers deploying from the launch site may not make it in time to the recovery site (except, of course, K0SCC). Trackers positioned downrange will bear the brunt of locating the payload whilst awaiting the launch teams and students. Stations Alpha, Bravo and Echo will pre-deploy to the recovery site. Alternative repeaters TBD. Sterling, if operational, may be of help. More later. Student staging and rally point will be at the Kwik Stop on the NE corner of Highway 6 and Highway 385 in Holyoke.